CN114086178B - Corrosion-resistant alloy feeding pipe for producing isooctane and processing technology thereof - Google Patents
Corrosion-resistant alloy feeding pipe for producing isooctane and processing technology thereof Download PDFInfo
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- CN114086178B CN114086178B CN202111416353.6A CN202111416353A CN114086178B CN 114086178 B CN114086178 B CN 114086178B CN 202111416353 A CN202111416353 A CN 202111416353A CN 114086178 B CN114086178 B CN 114086178B
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- tube body
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- 229910045601 alloy Inorganic materials 0.000 title claims abstract description 149
- 239000000956 alloy Substances 0.000 title claims abstract description 149
- 238000005260 corrosion Methods 0.000 title claims abstract description 44
- 230000007797 corrosion Effects 0.000 title claims abstract description 44
- NHTMVDHEPJAVLT-UHFFFAOYSA-N Isooctane Chemical compound CC(C)CC(C)(C)C NHTMVDHEPJAVLT-UHFFFAOYSA-N 0.000 title claims abstract description 27
- JVSWJIKNEAIKJW-UHFFFAOYSA-N dimethyl-hexane Natural products CCCCCC(C)C JVSWJIKNEAIKJW-UHFFFAOYSA-N 0.000 title claims abstract description 27
- 238000005516 engineering process Methods 0.000 title claims abstract description 27
- 238000012545 processing Methods 0.000 title claims abstract description 24
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 58
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims abstract description 42
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 claims abstract description 36
- 239000011863 silicon-based powder Substances 0.000 claims abstract description 23
- 239000002002 slurry Substances 0.000 claims abstract description 23
- 229910052782 aluminium Inorganic materials 0.000 claims abstract description 18
- UXVMQQNJUSDDNG-UHFFFAOYSA-L Calcium chloride Chemical compound [Cl-].[Cl-].[Ca+2] UXVMQQNJUSDDNG-UHFFFAOYSA-L 0.000 claims abstract description 13
- 239000001110 calcium chloride Substances 0.000 claims abstract description 13
- 229910001628 calcium chloride Inorganic materials 0.000 claims abstract description 13
- 229910052710 silicon Inorganic materials 0.000 claims abstract description 13
- 239000010703 silicon Substances 0.000 claims abstract description 13
- 239000010935 stainless steel Substances 0.000 claims abstract description 10
- 229910001220 stainless steel Inorganic materials 0.000 claims abstract description 10
- 238000000034 method Methods 0.000 claims abstract description 9
- 239000000243 solution Substances 0.000 claims description 101
- KRKNYBCHXYNGOX-UHFFFAOYSA-N citric acid Chemical compound OC(=O)CC(O)(C(O)=O)CC(O)=O KRKNYBCHXYNGOX-UHFFFAOYSA-N 0.000 claims description 72
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 claims description 68
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 58
- 238000002156 mixing Methods 0.000 claims description 49
- 239000008367 deionised water Substances 0.000 claims description 46
- 229910021641 deionized water Inorganic materials 0.000 claims description 46
- 238000001035 drying Methods 0.000 claims description 35
- GSYTVXOARWSQSV-BYPYZUCNSA-N L-methioninamide Chemical compound CSCC[C@H](N)C(N)=O GSYTVXOARWSQSV-BYPYZUCNSA-N 0.000 claims description 30
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 claims description 29
- 238000002791 soaking Methods 0.000 claims description 29
- 238000004506 ultrasonic cleaning Methods 0.000 claims description 27
- 239000000843 powder Substances 0.000 claims description 22
- 238000003756 stirring Methods 0.000 claims description 22
- CSCPPACGZOOCGX-UHFFFAOYSA-N Acetone Chemical compound CC(C)=O CSCPPACGZOOCGX-UHFFFAOYSA-N 0.000 claims description 20
- 239000002253 acid Substances 0.000 claims description 20
- -1 rare earth chloride Chemical class 0.000 claims description 20
- 229910052761 rare earth metal Inorganic materials 0.000 claims description 20
- NMGYKLMMQCTUGI-UHFFFAOYSA-J diazanium;titanium(4+);hexafluoride Chemical compound [NH4+].[NH4+].[F-].[F-].[F-].[F-].[F-].[F-].[Ti+4] NMGYKLMMQCTUGI-UHFFFAOYSA-J 0.000 claims description 19
- 238000006243 chemical reaction Methods 0.000 claims description 18
- MLQBTMWHIOYKKC-KTKRTIGZSA-N (z)-octadec-9-enoyl chloride Chemical compound CCCCCCCC\C=C/CCCCCCCC(Cl)=O MLQBTMWHIOYKKC-KTKRTIGZSA-N 0.000 claims description 16
- FFEARJCKVFRZRR-BYPYZUCNSA-N L-methionine Chemical compound CSCC[C@H](N)C(O)=O FFEARJCKVFRZRR-BYPYZUCNSA-N 0.000 claims description 16
- 239000004372 Polyvinyl alcohol Substances 0.000 claims description 16
- 229930182817 methionine Natural products 0.000 claims description 16
- 229920002451 polyvinyl alcohol Polymers 0.000 claims description 16
- 238000005406 washing Methods 0.000 claims description 16
- 238000010438 heat treatment Methods 0.000 claims description 15
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 claims description 12
- 235000021355 Stearic acid Nutrition 0.000 claims description 11
- GDVKFRBCXAPAQJ-UHFFFAOYSA-A dialuminum;hexamagnesium;carbonate;hexadecahydroxide Chemical compound [OH-].[OH-].[OH-].[OH-].[OH-].[OH-].[OH-].[OH-].[OH-].[OH-].[OH-].[OH-].[OH-].[OH-].[OH-].[OH-].[Mg+2].[Mg+2].[Mg+2].[Mg+2].[Mg+2].[Mg+2].[Al+3].[Al+3].[O-]C([O-])=O GDVKFRBCXAPAQJ-UHFFFAOYSA-A 0.000 claims description 11
- 229960001545 hydrotalcite Drugs 0.000 claims description 11
- 229910001701 hydrotalcite Inorganic materials 0.000 claims description 11
- QIQXTHQIDYTFRH-UHFFFAOYSA-N octadecanoic acid Chemical compound CCCCCCCCCCCCCCCCCC(O)=O QIQXTHQIDYTFRH-UHFFFAOYSA-N 0.000 claims description 11
- OQCDKBAXFALNLD-UHFFFAOYSA-N octadecanoic acid Natural products CCCCCCCC(C)CCCCCCCCC(O)=O OQCDKBAXFALNLD-UHFFFAOYSA-N 0.000 claims description 11
- 239000008117 stearic acid Substances 0.000 claims description 11
- XIOUDVJTOYVRTB-UHFFFAOYSA-N 1-(1-adamantyl)-3-aminothiourea Chemical compound C1C(C2)CC3CC2CC1(NC(=S)NN)C3 XIOUDVJTOYVRTB-UHFFFAOYSA-N 0.000 claims description 10
- PAWQVTBBRAZDMG-UHFFFAOYSA-N 2-(3-bromo-2-fluorophenyl)acetic acid Chemical compound OC(=O)CC1=CC=CC(Br)=C1F PAWQVTBBRAZDMG-UHFFFAOYSA-N 0.000 claims description 10
- 238000004140 cleaning Methods 0.000 claims description 10
- 238000005498 polishing Methods 0.000 claims description 10
- 244000137852 Petrea volubilis Species 0.000 claims description 9
- 238000004321 preservation Methods 0.000 claims description 9
- 238000007789 sealing Methods 0.000 claims description 9
- 238000001291 vacuum drying Methods 0.000 claims description 9
- 229910004664 Cerium(III) chloride Inorganic materials 0.000 claims description 8
- VYLVYHXQOHJDJL-UHFFFAOYSA-K cerium trichloride Chemical compound Cl[Ce](Cl)Cl VYLVYHXQOHJDJL-UHFFFAOYSA-K 0.000 claims description 8
- 238000001816 cooling Methods 0.000 claims description 8
- 238000000227 grinding Methods 0.000 claims description 8
- BHXBZLPMVFUQBQ-UHFFFAOYSA-K samarium(iii) chloride Chemical compound Cl[Sm](Cl)Cl BHXBZLPMVFUQBQ-UHFFFAOYSA-K 0.000 claims description 8
- 238000011065 in-situ storage Methods 0.000 claims description 4
- 239000011259 mixed solution Substances 0.000 claims description 4
- 238000002360 preparation method Methods 0.000 claims description 4
- 150000001875 compounds Chemical class 0.000 claims description 3
- 239000010409 thin film Substances 0.000 claims description 3
- 238000001764 infiltration Methods 0.000 abstract description 6
- 230000002209 hydrophobic effect Effects 0.000 abstract description 5
- CSDREXVUYHZDNP-UHFFFAOYSA-N alumanylidynesilicon Chemical compound [Al].[Si] CSDREXVUYHZDNP-UHFFFAOYSA-N 0.000 abstract description 4
- 238000004519 manufacturing process Methods 0.000 abstract description 4
- 238000013461 design Methods 0.000 abstract description 3
- 230000003647 oxidation Effects 0.000 abstract description 3
- 238000007254 oxidation reaction Methods 0.000 abstract description 3
- 230000002035 prolonged effect Effects 0.000 abstract description 3
- 239000000126 substance Substances 0.000 abstract description 3
- 230000003213 activating effect Effects 0.000 abstract description 2
- 238000004381 surface treatment Methods 0.000 abstract description 2
- 230000000052 comparative effect Effects 0.000 description 12
- 235000019441 ethanol Nutrition 0.000 description 8
- 239000002904 solvent Substances 0.000 description 7
- 238000013329 compounding Methods 0.000 description 6
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 4
- 238000005804 alkylation reaction Methods 0.000 description 4
- 125000000217 alkyl group Chemical group 0.000 description 3
- CYUOWZRAOZFACA-UHFFFAOYSA-N aluminum iron Chemical compound [Al].[Fe] CYUOWZRAOZFACA-UHFFFAOYSA-N 0.000 description 3
- 238000001514 detection method Methods 0.000 description 3
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- FAPWRFPIFSIZLT-UHFFFAOYSA-M Sodium chloride Chemical compound [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 description 2
- 150000001335 aliphatic alkanes Chemical class 0.000 description 2
- 230000029936 alkylation Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000002474 experimental method Methods 0.000 description 2
- 229910052742 iron Inorganic materials 0.000 description 2
- 239000011159 matrix material Substances 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 229910000611 Zinc aluminium Inorganic materials 0.000 description 1
- 238000010306 acid treatment Methods 0.000 description 1
- 150000001298 alcohols Chemical class 0.000 description 1
- 150000001336 alkenes Chemical class 0.000 description 1
- 150000001350 alkyl halides Chemical class 0.000 description 1
- 150000008051 alkyl sulfates Chemical class 0.000 description 1
- 229940100198 alkylating agent Drugs 0.000 description 1
- 239000002168 alkylating agent Substances 0.000 description 1
- HXFVOUUOTHJFPX-UHFFFAOYSA-N alumane;zinc Chemical compound [AlH3].[Zn] HXFVOUUOTHJFPX-UHFFFAOYSA-N 0.000 description 1
- 150000001412 amines Chemical class 0.000 description 1
- 150000004945 aromatic hydrocarbons Chemical class 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 150000001735 carboxylic acids Chemical class 0.000 description 1
- 238000009792 diffusion process Methods 0.000 description 1
- 238000005530 etching Methods 0.000 description 1
- 125000001495 ethyl group Chemical group [H]C([H])([H])C([H])([H])* 0.000 description 1
- 150000002191 fatty alcohols Chemical class 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 230000005764 inhibitory process Effects 0.000 description 1
- 125000001449 isopropyl group Chemical group [H]C([H])([H])C([H])(*)C([H])([H])[H] 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 125000002496 methyl group Chemical group [H]C([H])([H])* 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- 230000006911 nucleation Effects 0.000 description 1
- 238000010899 nucleation Methods 0.000 description 1
- 239000003921 oil Substances 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 239000011780 sodium chloride Substances 0.000 description 1
- 230000003746 surface roughness Effects 0.000 description 1
- 125000000999 tert-butyl group Chemical group [H]C([H])([H])C(*)(C([H])([H])[H])C([H])([H])[H] 0.000 description 1
Classifications
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- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C28/00—Coating for obtaining at least two superposed coatings either by methods not provided for in a single one of groups C23C2/00 - C23C26/00 or by combinations of methods provided for in subclasses C23C and C25C or C25D
- C23C28/30—Coatings combining at least one metallic layer and at least one inorganic non-metallic layer
- C23C28/34—Coatings combining at least one metallic layer and at least one inorganic non-metallic layer including at least one inorganic non-metallic material layer, e.g. metal carbide, nitride, boride, silicide layer and their mixtures, enamels, phosphates and sulphates
-
- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C10/00—Solid state diffusion of only metal elements or silicon into metallic material surfaces
- C23C10/02—Pretreatment of the material to be coated
-
- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C10/00—Solid state diffusion of only metal elements or silicon into metallic material surfaces
- C23C10/18—Solid state diffusion of only metal elements or silicon into metallic material surfaces using liquids, e.g. salt baths, liquid suspensions
- C23C10/26—Solid state diffusion of only metal elements or silicon into metallic material surfaces using liquids, e.g. salt baths, liquid suspensions more than one element being diffused
-
- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C10/00—Solid state diffusion of only metal elements or silicon into metallic material surfaces
- C23C10/60—After-treatment
-
- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C22/00—Chemical surface treatment of metallic material by reaction of the surface with a reactive liquid, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals
- C23C22/05—Chemical surface treatment of metallic material by reaction of the surface with a reactive liquid, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals using aqueous solutions
- C23C22/60—Chemical surface treatment of metallic material by reaction of the surface with a reactive liquid, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals using aqueous solutions using alkaline aqueous solutions with pH greater than 8
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- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C22/00—Chemical surface treatment of metallic material by reaction of the surface with a reactive liquid, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals
- C23C22/82—After-treatment
- C23C22/83—Chemical after-treatment
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- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C28/00—Coating for obtaining at least two superposed coatings either by methods not provided for in a single one of groups C23C2/00 - C23C26/00 or by combinations of methods provided for in subclasses C23C and C25C or C25D
- C23C28/30—Coatings combining at least one metallic layer and at least one inorganic non-metallic layer
- C23C28/32—Coatings combining at least one metallic layer and at least one inorganic non-metallic layer including at least one pure metallic layer
- C23C28/321—Coatings combining at least one metallic layer and at least one inorganic non-metallic layer including at least one pure metallic layer with at least one metal alloy layer
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- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Inorganic Chemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Preventing Corrosion Or Incrustation Of Metals (AREA)
- Cleaning And De-Greasing Of Metallic Materials By Chemical Methods (AREA)
Abstract
The invention discloses a corrosion-resistant alloy feeding pipe for producing isooctane and a processing technology thereof, wherein the feeding pipe disclosed by the application is used for producing the isooctane, and the feeding pipe related to the production technology is contacted with chemical substances for a long time, so that the limitation of the application environment requires that the alloy feeding pipe has excellent oxidation resistance and corrosion resistance; therefore, the alloy pipe body is prepared from 316L stainless steel and subjected to surface treatment to improve the surface corrosion resistance. Aluminum powder is used as an aluminum supplying agent, silicon powder is used as a silicon supplying agent, calcium chloride is used as an activating agent, and an aluminum layer is subjected to co-infiltration on the surface of an alloy pipe body after co-infiltration slurry is prepared according to a formula; the corrosion resistance of the alloy feeding pipe can be effectively improved by arranging the aluminum-silicon co-permeation layer; the process design is reasonable, the operation is simple, the prepared alloy feeding pipe has excellent corrosion resistance, the surface is hydrophobic, the entry of corrosive media can be effectively prevented, the service life of the feeding pipe is prolonged, and the practicability is high.
Description
Technical Field
The invention relates to the technical field of alloys, in particular to a corrosion-resistant alloy feeding pipe for isooctane production and a processing technology thereof.
Background
Alkylation reaction (Alkylation reaction) is a reaction of introducing alkyl (-R) into carbon, nitrogen, oxygen and other atoms in an organic molecule, and is called Alkylation for short. Commonly used alkylating agents are alkenes, haloalkanes, alkyl sulfates, alcohols, and the like; the alkylate is mainly alkane and its derivatives, aromatic hydrocarbon and its derivatives. The alkane and its derivatives include fatty alcohol, fatty amine, carboxylic acid and its derivatives, etc., and alkyl groups such as methyl, ethyl, isopropyl, tert-butyl, long carbon chain alkyl, etc. can be introduced into the alkylated compound molecule by alkylation.
In the production process of isooctane, a raw material feeding pipe needs to be contacted with chemical substances for a long time, so the limitation of the application environment requires that an alloy feeding pipe needs to have excellent oxidation resistance and corrosion resistance, and the corrosion resistance of the existing alloy feeding pipe disclosed in the market can not meet the requirements of people.
Based on the situation, the corrosion-resistant alloy feeding pipe for producing isooctane and the processing technology thereof are disclosed to solve the technical problem.
Disclosure of Invention
The invention aims to provide a corrosion-resistant alloy feeding pipe for producing isooctane and a processing technology thereof, which aim to solve the problems in the background technology.
In order to solve the technical problems, the invention provides the following technical scheme:
a processing technology of a corrosion-resistant alloy feeding pipe for producing isooctane comprises the following steps:
(1) taking an alloy tube body, polishing the surface of the alloy tube body through sand paper, placing the polished alloy tube body in a hydrochloric acid solution for ultrasonic cleaning, ultrasonic cleaning through acetone, ultrasonic cleaning through deionized water, and drying for later use;
(2) taking the cleaned alloy pipe body, taking aluminum powder as an aluminum supplying agent and silicon powder as a silicon supplying agent, preparing a co-permeation agent, preparing co-permeation slurry, and performing aluminum-silicon co-permeation to obtain an alloy pipe body containing a surface co-permeation layer;
(3) soaking the alloy tube body treated in the step (2) into acid liquor, washing with absolute ethyl alcohol, and drying in vacuum to obtain a pretreated tube body;
(4) mixing and stirring zinc nitrate hexahydrate, ammonium nitrate and deionized water, and adjusting the pH value to 10 to obtain a solution A; putting the solution A and the pretreatment pipe body into a reaction kettle for sealing, controlling the external temperature to be 120-125 ℃, carrying out heat preservation treatment for 7.5-8h, taking out the pretreatment pipe body, washing with deionized water, and carrying out vacuum drying;
(5) And (3) mixing methionine amide and ammonium fluotitanate solution, adding the pretreated alloy tube body treated in the step (4), soaking in water bath at 48-50 ℃, soaking in stearic acid solution, taking out, drying and curing to obtain the finished product.
The optimized scheme comprises the following steps:
(1) taking an alloy tube body, polishing the surface of the alloy tube body through sand paper, placing the polished alloy tube body in a hydrochloric acid solution for ultrasonic cleaning for 3-4min, ultrasonic cleaning with acetone for 20-30min, ultrasonic cleaning with deionized water for 10-20min, and drying for later use;
(2) taking the cleaned alloy tube body, taking aluminum powder as an aluminum supplying agent and silicon powder as a silicon supplying agent, preparing a co-permeation agent, preparing co-permeation slurry, burying the alloy tube body into the co-permeation slurry, heating to 650 plus 660 ℃ at a heating rate of 8-10 ℃, preserving heat for 4-4.5h, cooling along with a furnace, cleaning with deionized water, and drying to obtain the alloy tube body with a surface co-permeation layer;
(3) soaking the alloy tube body treated in the step (2) into acid liquor for 40-50s, cleaning with absolute ethyl alcohol, and drying in vacuum to obtain a pretreated tube body;
(4) mixing and stirring zinc nitrate hexahydrate, ammonium nitrate and deionized water for 20-30min, and adjusting the pH value to 10 to obtain a solution A; putting the solution A and the pretreatment pipe body into a reaction kettle for sealing, controlling the external temperature to be 120-125 ℃, carrying out heat preservation treatment for 7.5-8h, taking out the pretreatment pipe body, washing with deionized water, and carrying out vacuum drying;
(5) And (3) mixing methionine amide and ammonium fluotitanate solution, adding the pretreated alloy tube body treated in the step (4), soaking in water bath at 48-50 ℃ for 35-40min, then placing in stearic acid solution, soaking for 30-40min, taking out, and drying and curing at 90-100 ℃ for 2-3h to obtain a finished product.
According to an optimized scheme, in the step (2), the preparation method of the co-cementation slurry comprises the following steps: mixing the co-permeation agent, grinding for 2-3h, adding a polyvinyl alcohol solution, and uniformly stirring to obtain co-permeation slurry; the mass ratio of the co-permeation agent to the polyvinyl alcohol solution is 1: 5.
in an optimized scheme, the co-permeation agent comprises the following components: by mass percentage, 10-12% of silicon powder, 23-26% of aluminum powder, 54-60% of alumina powder, 4-6% of calcium chloride powder and 1-2% of rare earth chloride.
According to an optimized scheme, in the step (3), the acid solution is a mixed solution of citric acid and hydrochloric acid, and the volume ratio of the citric acid to the hydrochloric acid is 1: 1.
in the optimized scheme, in the step (5), the preparation method of the methionine amide comprises the following steps: uniformly mixing methionine and oleoyl chloride, and reacting at 110-115 ℃ for 1.5-2h to obtain methionine amide; the mol ratio of methionine to oleoyl chloride is 1: 1.
in the optimized scheme, in the step (5), the volume ratio of the methionine amide solution to the ammonium fluotitanate solution is 1: (2-3).
In an optimized scheme, the alloy pipe body is made of 316L stainless steel. The rare earth chloride is any one or a plurality of compounds of cerium trichloride and samarium trichloride.
According to the optimized scheme, the alloy feeding pipe is prepared by the processing technology of the corrosion-resistant alloy feeding pipe for producing isooctane.
Compared with the prior art, the invention has the following beneficial effects:
the invention discloses a corrosion-resistant alloy feeding pipe for producing isooctane and a processing technology thereof, wherein the feeding pipe disclosed by the application is used for producing the isooctane, and the feeding pipe related to the production technology is contacted with chemical substances for a long time, so that the limitation of the application environment requires that the alloy feeding pipe has excellent oxidation resistance and corrosion resistance; therefore, the alloy pipe body is prepared from 316L stainless steel and subjected to surface treatment to improve the surface corrosion resistance.
Firstly, polishing the surface of an alloy pipe body, and sequentially cleaning hydrochloric acid, acetone and deionized water to remove impurities, oil stains and oxide layers on the surface of the alloy pipe body and ensure the adhesion of a subsequent aluminum-silicon co-permeation layer; then, the aluminum powder is used as an aluminum supply agent, silicon powder is used as a silicon supply agent, and calcium chloride is used as an activating agent, so that the formula is obtained: by mass percentage, 10-12% of silicon powder, 23-26% of aluminum powder, 54-60% of alumina powder, 4-6% of calcium chloride powder and 1-2% of rare earth chloride; preparing co-permeation slurry according to the formula, and then co-permeating an aluminum layer on the surface of the alloy pipe body; the aluminum-silicon co-permeation layer can effectively improve the corrosion resistance of the alloy feeding pipe, physically protect the alloy feeding pipe and prevent corrosive media from entering the alloy feeding pipe; the arrangement of the rare earth chloride can improve the uniform density of the co-permeation layer and avoid cracks on the surface of the co-permeation layer.
In the co-infiltration process, the silicon powder accounts for 10-12% and the aluminum powder accounts for 23-26%, based on the limitation of the components, the surface of the co-infiltration layer is flat, uniform and compact, and meanwhile, the silicon element can improve the outward diffusion resistance of iron in the co-infiltration process, so that the silicon element and the aluminum powder form a structure which sequentially comprises the following components from outside to inside on the surface of an alloy pipe body: the aluminum-rich layer, the aluminum-iron phase layer and the silicon-rich layer exist, an aluminum-rich phase exists at the outer side of the alloy tube body, and the existence of the aluminum-rich phase can effectively ensure the in-situ growth of the subsequent hydrotalcite so as to improve the corrosion resistance of the alloy tube body; here, it is to be emphasized that: when the content of the silicon powder is less, the silicon powder has less resistance to iron, so that the aluminum-iron co-doped layer is arranged on the outer side of the alloy tube body, an aluminum-iron phase is generated, and the content and the density of the generated hydrotalcite are far lower than those of the hydrotalcite in the subsequent hydrotalcite generation process; when the content of the silicon powder is more than that of the formula, cracks are easy to generate on the surface of the co-permeation layer, the physical protection of the alloy tube body is reduced, and the content and the density of the subsequently generated hydrotalcite are not improved, so that the technical effect realized by the limitation of the formula amount is the most excellent.
After the co-cementation treatment, the alloy pipe body with the co-cementation layer on the surface is soaked in acid liquor, and the acid liquor soaking can clean the surface of the alloy pipe body to remove surface alumina generated by the too fast cementation of aluminum in the co-cementation process on the surface, so as to provide a reaction matrix for the in-situ growth of subsequent hydrotalcite; meanwhile, after acid liquor treatment, the surface roughness of the alloy tube body can be improved, so that the surface of the alloy tube body contains more nucleation sites, the subsequent generation of a hydrotalcite layer is facilitated, and the corrosion resistance of the alloy tube body is improved.
After acid liquor treatment, zinc aluminum hydrotalcite thin film is grown in situ through zinc nitrate hexahydrate, ammonium nitrate and other components, and due to the cooperation of the co-infiltration and acid etching steps, the surface of the alloy pipe body contains an aluminum-rich layer, more reaction sites exist, a hydrotalcite layer can grow compactly and uniformly, and the uniform and compact hydrotalcite thin film layer can effectively block an anticorrosive medium so as to improve the corrosion resistance of the alloy pipe body.
On the basis, a mixed solution of methionine amide and ammonium fluotitanate is introduced, and the alloy tube body is immersed into the mixed solution, so that the surface of the alloy tube body is sealed to ensure the corrosion resistance of an alloy matrix, and the methionine amide has an excellent corrosion inhibition effect and contains hydrophobic long-chain alkyl, so that water molecules or corrosion media can be prevented from entering the alloy tube body; this application is after that carried out stearic acid modification on the surface, further improves the surface hydrophobic property of alloy body, improves the corrosion resisting property of alloy body, simultaneously can also very big degree avoid the material to remain, reduces the corruption of alloy body, improves life.
The invention discloses a corrosion-resistant alloy feeding pipe for producing isooctane and a processing technology thereof, the process is reasonable in design and simple to operate, the prepared alloy feeding pipe has excellent corrosion resistance, the surface of the alloy feeding pipe is hydrophobic, the corrosion medium can be effectively prevented from entering the alloy feeding pipe, the service life of the feeding pipe is prolonged, and the practicability is high.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely below, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Example 1:
a processing technology of a corrosion-resistant alloy feeding pipe for producing isooctane comprises the following steps:
(1) taking an alloy tube body, polishing the surface of the alloy tube body through sand paper, placing the polished alloy tube body in a hydrochloric acid solution with the volume fraction of 5% for ultrasonic cleaning for 3min, ultrasonic cleaning with acetone for 20min, ultrasonic cleaning with deionized water for 10min, and drying for later use; the alloy pipe body is made of 316L stainless steel;
(2) taking the cleaned alloy pipe body, taking aluminum powder as an aluminum supply agent and silicon powder as a silicon supply agent, and preparing a co-permeation agent, wherein the co-permeation agent comprises the following components: by mass percentage, 12% of silicon powder, 25% of aluminum powder, 57% of alumina powder, 4% of calcium chloride powder and 2% of rare earth chloride; the rare earth chloride is cerium trichloride and samarium trichloride in a mass ratio of 1: 1, compounding;
mixing the co-permeation agent, grinding for 2 hours, adding a polyvinyl alcohol solution, and uniformly stirring to obtain co-permeation slurry; the mass ratio of the co-permeation agent to the polyvinyl alcohol solution is 1: 5; embedding the alloy pipe body into the co-permeation slurry, heating to 660 ℃ at the heating rate of 8 ℃, preserving heat for 4 hours, cooling along with a furnace, washing with deionized water, and drying to obtain the alloy pipe body with the surface co-permeation layer;
(3) Taking citric acid and deionized water, and uniformly mixing to obtain a citric acid solution with the concentration of 20 g/L; taking 3ml of hydrochloric acid and 500ml of deionized water, and uniformly mixing to obtain a hydrochloric acid solution; mixing the hydrochloric acid solution and the citric acid solution, and stirring for 15min to obtain an acid solution; the volume ratio of the citric acid to the hydrochloric acid is 1: 1.
soaking the alloy tube body treated in the step (2) into acid liquor for 40s, cleaning with absolute ethyl alcohol, and drying in vacuum to obtain a pretreated tube body;
(4) mixing and stirring zinc nitrate hexahydrate, ammonium nitrate and deionized water for 20min, and adjusting the pH value to 10 to obtain a solution A; putting the solution A and the pretreatment pipe body into a reaction kettle, sealing, transferring the reaction kettle into an oven, controlling the temperature of the oven to be 120 ℃, carrying out heat preservation treatment for 8 hours, taking out the pretreatment pipe body, washing with deionized water, and carrying out vacuum drying;
(5) uniformly mixing methionine and oleoyl chloride, and reacting at 110 ℃ for 2h to obtain methionine amide; the mol ratio of methionine to oleoyl chloride is 1: 1; mixing methionine amide (30g/L) and an ammonium fluotitanate solution (30g/L), wherein the volume ratio of the methionine amide to the ammonium fluotitanate solution is 1: 3; and (3) adding the pretreated alloy tube body treated in the step (4), soaking in water bath at 48 ℃ for 40min, then placing in stearic acid solution (the mass fraction is 1%, and the solvent is ethanol), soaking for 30min, taking out, and drying and curing at 90 ℃ for 3h to obtain a finished product.
Example 2:
a processing technology of a corrosion-resistant alloy feeding pipe for producing isooctane comprises the following steps:
(1) taking an alloy tube body, polishing the surface of the alloy tube body through sand paper, placing the polished alloy tube body in a hydrochloric acid solution with the volume fraction of 5% for ultrasonic cleaning for 4min, ultrasonic cleaning with acetone for 25min, ultrasonic cleaning with deionized water for 15min, and drying for later use; the alloy pipe body is made of 316L stainless steel;
(2) taking the cleaned alloy pipe body, taking aluminum powder as an aluminum supply agent and silicon powder as a silicon supply agent, and preparing a co-permeation agent, wherein the co-permeation agent comprises the following components: by mass percentage, 12% of silicon powder, 25% of aluminum powder, 57% of alumina powder, 4% of calcium chloride powder and 2% of rare earth chloride; the rare earth chloride is cerium trichloride and samarium trichloride in a mass ratio of 1: 1, compounding;
mixing the co-permeation agent, grinding for 2.5 hours, adding a polyvinyl alcohol solution, and uniformly stirring to obtain co-permeation slurry; the mass ratio of the co-permeation agent to the polyvinyl alcohol solution is 1: 5; embedding the alloy pipe body into the co-permeation slurry, heating to 655 ℃ at a heating rate of 9 ℃, preserving heat for 4.2 hours, cooling along with a furnace, washing with deionized water, and drying to obtain the alloy pipe body with the surface co-permeation layer;
(3) taking citric acid and deionized water, and uniformly mixing to obtain a citric acid solution with the concentration of 20 g/L; taking 3ml of hydrochloric acid and 500ml of deionized water, and uniformly mixing to obtain a hydrochloric acid solution; mixing the hydrochloric acid solution and the citric acid solution, and stirring for 18min to obtain an acid solution; the volume ratio of the citric acid to the hydrochloric acid is 1: 1.
Soaking the alloy tube body treated in the step (2) into acid liquor for 45s, cleaning with absolute ethyl alcohol, and drying in vacuum to obtain a pretreated tube body;
(4) mixing and stirring zinc nitrate hexahydrate, ammonium nitrate and deionized water for 25min, and adjusting the pH value to 10 to obtain a solution A; putting the solution A and the pretreatment pipe body into a reaction kettle, sealing, transferring the reaction kettle into an oven, controlling the temperature of the oven to be 122 ℃, carrying out heat preservation treatment for 7.8 hours, taking out the pretreatment pipe body, washing with deionized water, and carrying out vacuum drying;
(5) uniformly mixing methionine and oleoyl chloride, and reacting at 112 ℃ for 1.8h to obtain methionine amide; the mol ratio of methionine to oleoyl chloride is 1: 1; mixing methionine amide (30g/L) and an ammonium fluotitanate solution (30g/L), wherein the volume ratio of the methionine amide to the ammonium fluotitanate solution is 1: 3; and (3) adding the pretreated alloy tube body treated in the step (4), soaking in water bath at 48 ℃ for 38min, then placing in stearic acid solution (the mass fraction is 1%, and the solvent is ethanol), soaking for 35min, taking out, and drying and curing at 95 ℃ for 2.5h to obtain a finished product.
Example 3:
a processing technology of a corrosion-resistant alloy feeding pipe for producing isooctane comprises the following steps:
(1) taking an alloy tube body, polishing the surface of the alloy tube body through sand paper, placing the polished alloy tube body in a hydrochloric acid solution with the volume fraction of 5% for ultrasonic cleaning for 4min, ultrasonic cleaning with acetone for 30min, ultrasonic cleaning with deionized water for 20min, and drying for later use; the alloy pipe body is made of 316L stainless steel;
(2) Taking the cleaned alloy pipe body, taking aluminum powder as an aluminum supply agent and silicon powder as a silicon supply agent, and preparing a co-permeation agent, wherein the co-permeation agent comprises the following components: by mass percentage, 12% of silicon powder, 25% of aluminum powder, 57% of alumina powder, 4% of calcium chloride powder and 2% of rare earth chloride; the rare earth chloride is cerium trichloride and samarium trichloride in a mass ratio of 1: 1, compounding;
mixing the co-permeation agent, grinding for 3 hours, adding a polyvinyl alcohol solution, and uniformly stirring to obtain co-permeation slurry; the mass ratio of the co-permeation agent to the polyvinyl alcohol solution is 1: 5; embedding the alloy pipe body into the co-permeation slurry, heating to 650 ℃ at a heating rate of 10 ℃, preserving heat for 4.5 hours, cooling along with a furnace, washing with deionized water, and drying to obtain the alloy pipe body with the surface co-permeation layer;
(3) taking citric acid and deionized water, and uniformly mixing to obtain a citric acid solution with the concentration of 20 g/L; taking 3ml of hydrochloric acid and 500ml of deionized water, and uniformly mixing to obtain a hydrochloric acid solution; mixing the hydrochloric acid solution and the citric acid solution, and stirring for 20min to obtain an acid solution; the volume ratio of the citric acid to the hydrochloric acid is 1: 1.
soaking the alloy tube body treated in the step (2) into acid liquor for 50s, cleaning with absolute ethyl alcohol, and drying in vacuum to obtain a pretreated tube body;
(4) Mixing and stirring zinc nitrate hexahydrate, ammonium nitrate and deionized water for 30min, and adjusting the pH value to 10 to obtain a solution A; putting the solution A and the pretreatment pipe body into a reaction kettle, sealing, transferring the reaction kettle into an oven, controlling the temperature of the oven to be 125 ℃, carrying out heat preservation treatment for 7.5 hours, taking out the pretreatment pipe body, washing with deionized water, and carrying out vacuum drying;
(5) uniformly mixing methionine and oleoyl chloride, and reacting at 115 ℃ for 1.5h to obtain methionine amide; the mol ratio of methionine to oleoyl chloride is 1: 1; mixing methionine amide (30g/L) and an ammonium fluotitanate solution (30g/L), wherein the volume ratio of the methionine amide to the ammonium fluotitanate solution is 1: 3; and (3) adding the pretreated alloy tube body treated in the step (4), soaking in water bath at 50 ℃ for 35min, then placing in a stearic acid solution (the mass fraction is 1%, and the solvent is ethanol), soaking for 40min, taking out, and drying and curing at 100 ℃ for 2h to obtain a finished product.
The following comparative experiments were carried out using example 2 as a control, and the contents of the other components and the process parameters except for the variables were the same as in example 2, specifically comparative examples 1 to 4:
comparative example 1: the formula of the co-permeation agent in comparative example 1 is as follows: 15% of silicon powder, 25% of aluminum powder, 52% of alumina powder, 4% of calcium chloride powder and 2% of rare earth chloride.
A processing technology of a corrosion-resistant alloy feeding pipe for producing isooctane comprises the following steps:
(1) taking an alloy tube body, polishing the surface of the alloy tube body through sand paper, placing the polished alloy tube body in a hydrochloric acid solution with the volume fraction of 5% for ultrasonic cleaning for 4min, ultrasonic cleaning with acetone for 25min, ultrasonic cleaning with deionized water for 15min, and drying for later use; the alloy pipe body is made of 316L stainless steel;
(2) taking the cleaned alloy pipe body, taking aluminum powder as an aluminum supply agent and silicon powder as a silicon supply agent, and preparing a co-permeation agent, wherein the co-permeation agent comprises the following components: by mass percentage, 15% of silicon powder, 25% of aluminum powder, 52% of alumina powder, 4% of calcium chloride powder and 2% of rare earth chloride; the rare earth chloride is cerium trichloride and samarium trichloride in a mass ratio of 1: 1, compounding;
mixing the co-permeation agent, grinding for 2.5 hours, adding a polyvinyl alcohol solution, and uniformly stirring to obtain co-permeation slurry; the mass ratio of the co-permeation agent to the polyvinyl alcohol solution is 1: 5; embedding the alloy pipe body into the co-permeation slurry, heating to 655 ℃ at a heating rate of 9 ℃, preserving heat for 4.2 hours, cooling along with a furnace, washing with deionized water, and drying to obtain the alloy pipe body with the surface co-permeation layer;
(3) taking citric acid and deionized water, and uniformly mixing to obtain a citric acid solution with the concentration of 20 g/L; taking 3ml of hydrochloric acid and 500ml of deionized water, and uniformly mixing to obtain a hydrochloric acid solution; mixing the hydrochloric acid solution and the citric acid solution, and stirring for 18min to obtain an acid solution; the volume ratio of the citric acid to the hydrochloric acid is 1: 1.
Soaking the alloy tube body treated in the step (2) into acid liquor for 45s, cleaning with absolute ethyl alcohol, and drying in vacuum to obtain a pretreated tube body;
(4) mixing and stirring zinc nitrate hexahydrate, ammonium nitrate and deionized water for 25min, and adjusting the pH value to 10 to obtain a solution A; putting the solution A and the pretreatment pipe body into a reaction kettle, sealing, transferring the reaction kettle into an oven, controlling the temperature of the oven to be 122 ℃, carrying out heat preservation treatment for 7.8 hours, taking out the pretreatment pipe body, washing with deionized water, and carrying out vacuum drying;
(5) uniformly mixing methionine and oleoyl chloride, and reacting at 112 ℃ for 1.8h to obtain methionine amide; the mol ratio of methionine to oleoyl chloride is 1: 1; mixing methionine amide (30g/L) and an ammonium fluotitanate solution (30g/L), wherein the volume ratio of the methionine amide to the ammonium fluotitanate solution is 1: 3; and (3) adding the pretreated alloy tube body treated in the step (4), soaking in water bath at 48 ℃ for 38min, then placing in stearic acid solution (the mass fraction is 1%, and the solvent is ethanol), soaking for 35min, taking out, and drying and curing at 95 ℃ for 2.5h to obtain a finished product.
Comparative example 2: the formula of the co-permeation agent in comparative example 2 is: 34% of aluminum powder, 60% of alumina powder, 4% of calcium chloride powder and 2% of rare earth chloride;
A processing technology of a corrosion-resistant alloy feeding pipe for producing isooctane comprises the following steps:
(1) taking an alloy tube body, polishing the surface of the alloy tube body through sand paper, placing the polished alloy tube body in a hydrochloric acid solution with the volume fraction of 5% for ultrasonic cleaning for 4min, ultrasonic cleaning with acetone for 25min, ultrasonic cleaning with deionized water for 15min, and drying for later use; the alloy pipe body is made of 316L stainless steel;
(2) taking the cleaned alloy pipe body, taking aluminum powder as an aluminum supply agent, and preparing a co-permeation agent, wherein the co-permeation agent comprises the following components: by mass percentage, 34 percent of aluminum powder, 60 percent of alumina powder, 4 percent of calcium chloride powder and 2 percent of rare earth chloride; the rare earth chloride is cerium trichloride and samarium trichloride in a mass ratio of 1: 1, compounding;
mixing the co-permeation agent, grinding for 2.5 hours, adding a polyvinyl alcohol solution, and uniformly stirring to obtain co-permeation slurry; the mass ratio of the co-permeation agent to the polyvinyl alcohol solution is 1: 5; embedding the alloy pipe body into the co-cementation slurry, heating to 655 ℃ at the temperature rise rate of 9 ℃, preserving heat for 4.2 hours, cooling along with a furnace, washing with deionized water, and drying to obtain the alloy pipe body with the surface cementation layer;
(3) taking citric acid and deionized water, and uniformly mixing to obtain a citric acid solution with the concentration of 20 g/L; taking 3ml of hydrochloric acid and 500ml of deionized water, and uniformly mixing to obtain a hydrochloric acid solution; mixing the hydrochloric acid solution and the citric acid solution, and stirring for 18min to obtain an acid solution; the volume ratio of the citric acid to the hydrochloric acid is 1: 1.
Soaking the alloy tube body treated in the step (2) into acid liquor for 45s, cleaning with absolute ethyl alcohol, and drying in vacuum to obtain a pretreated tube body;
(4) mixing and stirring zinc nitrate hexahydrate, ammonium nitrate and deionized water for 25min, and adjusting the pH value to 10 to obtain a solution A; putting the solution A and the pretreatment pipe body into a reaction kettle, sealing, transferring the reaction kettle into an oven, controlling the temperature of the oven to be 122 ℃, carrying out heat preservation treatment for 7.8 hours, taking out the pretreatment pipe body, washing with deionized water, and carrying out vacuum drying;
(5) uniformly mixing methionine and oleoyl chloride, and reacting at 112 ℃ for 1.8h to obtain methionine amide; the mol ratio of methionine to oleoyl chloride is 1: 1; mixing methionine amide (30g/L) and an ammonium fluotitanate solution (30g/L), wherein the volume ratio of the methionine amide to the ammonium fluotitanate solution is 1: 3; and (3) adding the pretreated alloy tube body treated in the step (4), soaking in water bath at 48 ℃ for 38min, then placing in stearic acid solution (the mass fraction is 1%, and the solvent is ethanol), soaking for 35min, taking out, and drying and curing at 95 ℃ for 2.5h to obtain a finished product.
Comparative example 3: comparative example 3 did not have acid treatment;
a processing technology of a corrosion-resistant alloy feeding pipe for producing isooctane comprises the following steps:
(1) Taking an alloy tube body, polishing the surface of the alloy tube body through sand paper, placing the polished alloy tube body in a hydrochloric acid solution with the volume fraction of 5% for ultrasonic cleaning for 4min, ultrasonic cleaning with acetone for 25min, ultrasonic cleaning with deionized water for 15min, and drying for later use; the alloy pipe body is made of 316L stainless steel;
(2) taking the cleaned alloy pipe body, taking aluminum powder as an aluminum supply agent and silicon powder as a silicon supply agent, and preparing a co-permeation agent, wherein the co-permeation agent comprises the following components: by mass percentage, 12% of silicon powder, 25% of aluminum powder, 57% of alumina powder, 4% of calcium chloride powder and 2% of rare earth chloride; the rare earth chloride is cerium trichloride and samarium trichloride in a mass ratio of 1: 1, compounding;
mixing the co-permeation agent, grinding for 2.5 hours, adding a polyvinyl alcohol solution, and uniformly stirring to obtain co-permeation slurry; the mass ratio of the co-permeation agent to the polyvinyl alcohol solution is 1: 5; embedding the alloy pipe body into the co-permeation slurry, heating to 655 ℃ at a heating rate of 9 ℃, preserving heat for 4.2 hours, cooling along with a furnace, washing with deionized water, and drying to obtain the alloy pipe body with the surface co-permeation layer;
(3) mixing and stirring zinc nitrate hexahydrate, ammonium nitrate and deionized water for 25min, and adjusting the pH value to 10 to obtain a solution A; putting the solution A and the tube body processed in the step (2) into a reaction kettle, sealing, transferring the reaction kettle into an oven, controlling the temperature of the oven to be 122 ℃, carrying out heat preservation treatment for 7.8 hours, taking out the pretreated tube body, washing with deionized water, and carrying out vacuum drying;
(4) Uniformly mixing methionine and oleoyl chloride, and reacting at 112 ℃ for 1.8h to obtain methionine amide; the mol ratio of methionine to oleoyl chloride is 1: 1; mixing methionine amide (30g/L) and an ammonium fluotitanate solution (30g/L), wherein the volume ratio of the methionine amide to the ammonium fluotitanate solution is 1: 3; and (3) adding the alloy tube body treated in the step (3), soaking in water bath at 48 ℃ for 38min, then placing in stearic acid solution (the mass fraction is 1%, and the solvent is ethanol), soaking for 35min, taking out, and drying and curing at 95 ℃ for 2.5h to obtain a finished product.
Comparative example 4: in comparative example 4, no methionine amide was introduced, and the specific steps were:
(5) and (3) adding the ammonium fluotitanate solution (30g/L) into the pretreated alloy tube body treated in the step (4), soaking in water bath at 48 ℃ for 38min, then placing in stearic acid solution (the mass fraction is 1%, and the solvent is ethanol), soaking for 35min, taking out, and drying and curing at 95 ℃ for 2.5h to obtain a finished product.
The remaining steps were unchanged.
Detection experiment:
1. the alloy tubes prepared in examples 1 to 3 and comparative examples 1 to 4 were subjected to surface hydrophobicity detection using a contact angle detector, and the detection was performed using 2 μ L water droplets, and 5 positions were measured and averaged and recorded.
2. The alloy tube bodies prepared in examples 1 to 3 and comparative examples 1 to 4 were immersed in a 4% sodium chloride solution, and the surface morphology of the alloy tube bodies was observed.
And (4) conclusion: the invention discloses a corrosion-resistant alloy feeding pipe for producing isooctane and a processing technology thereof, the process is reasonable in design and simple to operate, the prepared alloy feeding pipe has excellent corrosion resistance, the surface of the alloy feeding pipe is hydrophobic, the corrosion medium can be effectively prevented from entering the alloy feeding pipe, the service life of the feeding pipe is prolonged, and the practicability is high.
Finally, it should be noted that: although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that changes may be made in the embodiments and/or equivalents thereof without departing from the spirit and scope of the invention. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (7)
1. A processing technology of a corrosion-resistant alloy feeding pipe for producing isooctane is characterized by comprising the following steps: the method comprises the following steps:
(1) taking an alloy tube body, polishing the surface of the alloy tube body through sand paper, placing the polished alloy tube body in a hydrochloric acid solution for ultrasonic cleaning for 3-4min, ultrasonic cleaning with acetone for 20-30min, ultrasonic cleaning with deionized water for 10-20min, and drying for later use;
(2) Taking the cleaned alloy tube body, taking aluminum powder as an aluminum supplying agent and silicon powder as a silicon supplying agent, preparing a co-permeation agent, preparing co-permeation slurry, burying the alloy tube body into the co-permeation slurry, heating to 650 plus 660 ℃ at a heating rate of 8-10 ℃, preserving heat for 4-4.5h, cooling along with a furnace, cleaning with deionized water, and drying to obtain the alloy tube body with a surface co-permeation layer;
the co-permeation agent comprises the following components: by mass percentage, 10-12% of silicon powder, 23-26% of aluminum powder, 54-60% of alumina powder, 4-6% of calcium chloride powder and 1-2% of rare earth chloride;
(3) soaking the alloy tube body treated in the step (2) into acid liquor for 40-50s, cleaning with absolute ethyl alcohol, and drying in vacuum to obtain a pretreated tube body;
(4) mixing and stirring zinc nitrate hexahydrate, ammonium nitrate and deionized water for 20-30min, and adjusting the pH value to 10 to obtain a solution A; putting the solution A and the pretreatment pipe body into a reaction kettle for sealing, controlling the external temperature to be 120-125 ℃, carrying out heat preservation treatment for 7.5-8h, growing a uniform and compact hydrotalcite thin film layer in situ, taking out the pretreatment pipe body, washing with deionized water, and carrying out vacuum drying;
(5) mixing methionine amide and ammonium fluotitanate solutions, wherein the volume ratio of the methionine amide to the ammonium fluotitanate solution is 1: (2-3); and (4) adding the pretreated alloy tube body treated in the step (4), soaking in water bath at 48-50 ℃ for 35-40min, then placing in stearic acid solution, soaking for 30-40min, taking out, and drying and curing at 90-100 ℃ for 2-3h to obtain a finished product.
2. The processing technology of the corrosion-resistant alloy feeding pipe for producing isooctane according to claim 1, which is characterized in that: in the step (2), the preparation method of the co-cementation slurry comprises the following steps: mixing the co-permeation agent, grinding for 2-3h, adding a polyvinyl alcohol solution, and uniformly stirring to obtain co-permeation slurry; the mass ratio of the co-permeation agent to the polyvinyl alcohol solution is 1: 5.
3. the processing technology of the corrosion-resistant alloy feeding pipe for producing isooctane according to claim 2, which is characterized in that: in the step (3), the acid solution is a mixed solution of citric acid and hydrochloric acid, and the volume ratio of the citric acid to the hydrochloric acid is 1: 1.
4. the processing technology of the corrosion-resistant alloy feeding pipe for producing isooctane according to claim 1, which is characterized in that: in the step (5), the preparation method of the methionine amide comprises the following steps: uniformly mixing methionine and oleoyl chloride, and reacting at 110-115 ℃ for 1.5-2h to obtain methionine amide; the mol ratio of methionine to oleoyl chloride is 1: 1.
5. the processing technology of the corrosion-resistant alloy feeding pipe for producing isooctane according to claim 1, which is characterized in that: the alloy pipe body is made of 316L stainless steel.
6. The processing technology of the corrosion-resistant alloy feeding pipe for producing isooctane according to claim 1, which is characterized in that: the rare earth chloride is any one or a plurality of compounds of cerium trichloride and samarium trichloride.
7. The alloy feeding pipe prepared by the processing technology of the corrosion-resistant alloy feeding pipe for producing isooctane according to any one of claims 1-6.
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| WO2021000918A1 (en) * | 2019-07-03 | 2021-01-07 | 北京化工大学 | Composition for surface treatment of fibers and fiber treatment method |
| US20210071307A1 (en) * | 2019-04-09 | 2021-03-11 | Changsha University Of Science & Technology | Molten al-si alloy corrosion resistant composite coating and preparation method and application thereof |
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| CN111349884A (en) * | 2018-12-20 | 2020-06-30 | 天津大学 | Preparation method of zinc-aluminum hydrotalcite film growing on steel surface in situ |
| US20210071307A1 (en) * | 2019-04-09 | 2021-03-11 | Changsha University Of Science & Technology | Molten al-si alloy corrosion resistant composite coating and preparation method and application thereof |
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