CN115354341A - Mildew spot cleaning agent, preparation method of mildew spot cleaning agent and cleaning method of alloy - Google Patents
Mildew spot cleaning agent, preparation method of mildew spot cleaning agent and cleaning method of alloy Download PDFInfo
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- CN115354341A CN115354341A CN202211024369.7A CN202211024369A CN115354341A CN 115354341 A CN115354341 A CN 115354341A CN 202211024369 A CN202211024369 A CN 202211024369A CN 115354341 A CN115354341 A CN 115354341A
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- 239000012459 cleaning agent Substances 0.000 title claims abstract description 58
- 238000004140 cleaning Methods 0.000 title claims abstract description 46
- 229910045601 alloy Inorganic materials 0.000 title claims abstract description 21
- 239000000956 alloy Substances 0.000 title claims abstract description 21
- 238000000034 method Methods 0.000 title claims abstract description 14
- 238000002360 preparation method Methods 0.000 title abstract description 11
- KRKNYBCHXYNGOX-UHFFFAOYSA-N citric acid Chemical compound OC(=O)CC(O)(C(O)=O)CC(O)=O KRKNYBCHXYNGOX-UHFFFAOYSA-N 0.000 claims abstract description 90
- UMGDCJDMYOKAJW-UHFFFAOYSA-N thiourea Chemical compound NC(N)=S UMGDCJDMYOKAJW-UHFFFAOYSA-N 0.000 claims abstract description 44
- 239000000654 additive Substances 0.000 claims abstract description 43
- 230000000996 additive effect Effects 0.000 claims abstract description 39
- 229910002651 NO3 Inorganic materials 0.000 claims abstract description 26
- NHNBFGGVMKEFGY-UHFFFAOYSA-N Nitrate Chemical compound [O-][N+]([O-])=O NHNBFGGVMKEFGY-UHFFFAOYSA-N 0.000 claims abstract description 26
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 24
- KRKNYBCHXYNGOX-UHFFFAOYSA-K Citrate Chemical compound [O-]C(=O)CC(O)(CC([O-])=O)C([O-])=O KRKNYBCHXYNGOX-UHFFFAOYSA-K 0.000 claims abstract description 23
- XSQUKJJJFZCRTK-UHFFFAOYSA-N Urea Natural products NC(N)=O XSQUKJJJFZCRTK-UHFFFAOYSA-N 0.000 claims abstract description 22
- 239000003995 emulsifying agent Substances 0.000 claims abstract description 21
- LNOPIUAQISRISI-UHFFFAOYSA-N n'-hydroxy-2-propan-2-ylsulfonylethanimidamide Chemical compound CC(C)S(=O)(=O)CC(N)=NO LNOPIUAQISRISI-UHFFFAOYSA-N 0.000 claims abstract description 21
- BAERPNBPLZWCES-UHFFFAOYSA-N (2-hydroxy-1-phosphonoethyl)phosphonic acid Chemical compound OCC(P(O)(O)=O)P(O)(O)=O BAERPNBPLZWCES-UHFFFAOYSA-N 0.000 claims abstract description 16
- 238000013329 compounding Methods 0.000 claims abstract description 14
- 238000002156 mixing Methods 0.000 claims abstract description 14
- GRYLNZFGIOXLOG-UHFFFAOYSA-N Nitric acid Chemical compound O[N+]([O-])=O GRYLNZFGIOXLOG-UHFFFAOYSA-N 0.000 claims abstract description 10
- 229910017604 nitric acid Inorganic materials 0.000 claims abstract description 10
- 229910000838 Al alloy Inorganic materials 0.000 claims description 58
- 238000003756 stirring Methods 0.000 claims description 13
- 239000004094 surface-active agent Substances 0.000 claims description 13
- ZBJVLWIYKOAYQH-UHFFFAOYSA-N naphthalen-2-yl 2-hydroxybenzoate Chemical compound OC1=CC=CC=C1C(=O)OC1=CC=C(C=CC=C2)C2=C1 ZBJVLWIYKOAYQH-UHFFFAOYSA-N 0.000 claims description 9
- VWDWKYIASSYTQR-UHFFFAOYSA-N sodium nitrate Chemical compound [Na+].[O-][N+]([O-])=O VWDWKYIASSYTQR-UHFFFAOYSA-N 0.000 claims description 6
- 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 3
- NLJMYIDDQXHKNR-UHFFFAOYSA-K sodium citrate Chemical compound O.O.[Na+].[Na+].[Na+].[O-]C(=O)CC(O)(CC([O-])=O)C([O-])=O NLJMYIDDQXHKNR-UHFFFAOYSA-K 0.000 claims description 3
- 239000001509 sodium citrate Substances 0.000 claims description 3
- 239000004317 sodium nitrate Substances 0.000 claims description 3
- 235000010344 sodium nitrate Nutrition 0.000 claims description 3
- YWYZEGXAUVWDED-UHFFFAOYSA-N triammonium citrate Chemical compound [NH4+].[NH4+].[NH4+].[O-]C(=O)CC(O)(CC([O-])=O)C([O-])=O YWYZEGXAUVWDED-UHFFFAOYSA-N 0.000 claims description 3
- 238000004519 manufacturing process Methods 0.000 claims description 2
- 238000009472 formulation Methods 0.000 claims 2
- 239000000203 mixture Substances 0.000 claims 2
- IIACRCGMVDHOTQ-UHFFFAOYSA-N sulfamic acid Chemical compound NS(O)(=O)=O IIACRCGMVDHOTQ-UHFFFAOYSA-N 0.000 claims 1
- 230000000694 effects Effects 0.000 abstract description 12
- 230000002195 synergetic effect Effects 0.000 abstract description 3
- 238000005266 casting Methods 0.000 description 20
- 238000002791 soaking Methods 0.000 description 16
- 239000008367 deionised water Substances 0.000 description 15
- 229910021641 deionized water Inorganic materials 0.000 description 15
- DBVJJBKOTRCVKF-UHFFFAOYSA-N Etidronic acid Chemical compound OP(=O)(O)C(O)(C)P(O)(O)=O DBVJJBKOTRCVKF-UHFFFAOYSA-N 0.000 description 13
- 230000000052 comparative effect Effects 0.000 description 13
- 238000012360 testing method Methods 0.000 description 13
- 238000002161 passivation Methods 0.000 description 10
- 238000005406 washing Methods 0.000 description 10
- 230000007797 corrosion Effects 0.000 description 7
- 238000005260 corrosion Methods 0.000 description 7
- 150000003839 salts Chemical class 0.000 description 7
- 239000007921 spray Substances 0.000 description 7
- 238000001035 drying Methods 0.000 description 5
- 238000010438 heat treatment Methods 0.000 description 5
- 239000002994 raw material Substances 0.000 description 5
- 239000011248 coating agent Substances 0.000 description 4
- 238000000576 coating method Methods 0.000 description 4
- 230000007935 neutral effect Effects 0.000 description 4
- 238000005488 sandblasting Methods 0.000 description 4
- 230000008034 disappearance Effects 0.000 description 3
- RTZKZFJDLAIYFH-UHFFFAOYSA-N Diethyl ether Chemical compound CCOCC RTZKZFJDLAIYFH-UHFFFAOYSA-N 0.000 description 2
- FAPWRFPIFSIZLT-UHFFFAOYSA-M Sodium chloride Chemical compound [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000005764 inhibitory process Effects 0.000 description 2
- 239000003595 mist Substances 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000009467 reduction Effects 0.000 description 2
- 238000004381 surface treatment Methods 0.000 description 2
- 230000002087 whitening effect Effects 0.000 description 2
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 description 1
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000005422 blasting Methods 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 239000003153 chemical reaction reagent Substances 0.000 description 1
- 229910052804 chromium Inorganic materials 0.000 description 1
- 239000011651 chromium Substances 0.000 description 1
- 150000001860 citric acid derivatives Chemical class 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 238000009833 condensation Methods 0.000 description 1
- 230000005494 condensation Effects 0.000 description 1
- 238000005238 degreasing Methods 0.000 description 1
- 239000006185 dispersion Substances 0.000 description 1
- 230000008030 elimination Effects 0.000 description 1
- 238000003379 elimination reaction Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 150000002191 fatty alcohols Chemical class 0.000 description 1
- 238000000227 grinding Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000009776 industrial production Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- PABMYGSISSUOET-UHFFFAOYSA-N nitric acid;thiourea Chemical compound NC(N)=S.O[N+]([O-])=O PABMYGSISSUOET-UHFFFAOYSA-N 0.000 description 1
- 231100000252 nontoxic Toxicity 0.000 description 1
- 230000003000 nontoxic effect Effects 0.000 description 1
- 239000003973 paint Substances 0.000 description 1
- 238000005498 polishing Methods 0.000 description 1
- 229920002503 polyoxyethylene-polyoxypropylene Polymers 0.000 description 1
- 239000011780 sodium chloride Substances 0.000 description 1
- 238000005063 solubilization Methods 0.000 description 1
- 230000007928 solubilization Effects 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
- 239000000725 suspension Substances 0.000 description 1
Classifications
-
- 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
- C23G—CLEANING OR DE-GREASING OF METALLIC MATERIAL BY CHEMICAL METHODS OTHER THAN ELECTROLYSIS
- C23G5/00—Cleaning or de-greasing metallic material by other methods; Apparatus for cleaning or de-greasing metallic material with organic solvents
- C23G5/06—Cleaning or de-greasing metallic material by other methods; Apparatus for cleaning or de-greasing metallic material with organic solvents using emulsions
-
- 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
- C23C22/06—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 aqueous acidic solutions with pH less than 6
- C23C22/48—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 aqueous acidic solutions with pH less than 6 not containing phosphates, hexavalent chromium compounds, fluorides or complex fluorides, molybdates, tungstates, vanadates or oxalates
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- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Cleaning And De-Greasing Of Metallic Materials By Chemical Methods (AREA)
Abstract
The invention discloses a mildew spot cleaning agent, a preparation method of the mildew spot cleaning agent and a cleaning method of an alloy, wherein the mildew spot cleaning agent comprises nitric acid or nitrate, citrate, thiourea, sulfamic acid, an additive and an emulsifier, and the additive is prepared by compounding hydroxyethylidene diphosphonic acid and citric acid; the preparation method comprises the steps of adding citrate, nitrate, thiourea, sulfamic acid, an emulsifier and an additive into water, and mixing to obtain the cleaning agent. The mildew spot cleaning agent disclosed by the invention is prepared by compounding the hydroxyethylidene diphosphonic acid and the citric acid as additives, and the hydroxyethylidene diphosphonic acid and the citric acid have a synergistic effect, so that the cleaning effect can be improved, and the mildew spot cleaning agent can be applied to removal of mildew spots.
Description
Technical Field
The invention relates to the technical field of surface treatment, in particular to a mildew spot cleaning agent, a preparation method of the mildew spot cleaning agent and a cleaning method of an alloy.
Background
Alloys have many excellent properties, but some of their corrosion resistance properties have in some cases been short sheets of their properties, limiting their widespread use, for example, aluminum alloys. At present, the most simple and effective applications in the treatment of aluminum alloy corrosion mildew are sand blasting, sand blasting and pure nitric acid whitening, wherein the pure nitric acid whitening is a treatment technology for quickly removing the mildew, and the nitrate mist has high volatility or strong corrosivity and has different degrees of harm to the environment and a human body, so that more effective and environment-friendly aluminum alloy surface treatment technologies are developed in an effort, such as industrial application of grinding, sand blasting and shot blasting, the efficiency is low, the cost is high, but at present, satisfactory research results are not obtained, and the aluminum alloy cleaning agent in the existing market can only clean surface oil stains and cannot clean corrosion points and mildew.
In view of this, the invention is particularly proposed.
Disclosure of Invention
The invention aims to provide a mildew spot cleaning agent, a preparation method of the mildew spot cleaning agent and an alloy cleaning method, and solve the problems that the existing aluminum alloy cleaning agent can only clean oil stains on the surface and cannot clean corrosion spots and mildew spots.
The invention is realized by the following steps:
in a first aspect, the invention provides a mildew spot cleaning agent, which comprises nitric acid or nitrate, citrate, thiourea, sulfamic acid, an additive and an emulsifier, wherein the additive is prepared by compounding hydroxyethylidene diphosphonic acid and citric acid.
In an alternative embodiment, the method comprises the following steps:
17-19 g/L of nitric acid or nitrate;
3-6 g/L of citrate;
0.1-2 g/L of thiourea;
0.1-0.2 g/L sulfamic acid;
0.5-1.5 g/L of additive;
0.5-1 g/L of emulsifier.
In an alternative embodiment, the emulsifier is akysu Berol 226SA surfactant.
In an optional embodiment, the additive comprises hydroxyethylidene diphosphonic acid and citric acid in a weight ratio of (1-2): (1-3) are compounded.
In an alternative embodiment, the citrate salt is at least one of sodium citrate, ammonium citrate.
In an alternative embodiment, the nitrate is at least one of sodium nitrate, ammonium nitrate.
In a second aspect, the present invention provides a method for preparing a mildew stain cleaning agent according to any one of the preceding embodiments, wherein citrate, nitrate, thiourea, sulfamic acid, an emulsifier and an additive are added into water, and mixed to obtain the cleaning agent.
In an alternative embodiment, the mixing step is stirring the solution for 5-10min.
In a third aspect, the invention provides a method for cleaning an alloy, wherein a part to be cleaned of the alloy is contacted with the cleaning agent in any one of the previous embodiments.
In an alternative embodiment, the alloy is an aluminum alloy;
preferably, the temperature of the cleaning agent is 35-45 ℃.
In an alternative embodiment, after the alloy to be cleaned is contacted with the cleaning agent, the cleaned part is passivated.
The invention has the following beneficial effects:
compared with the traditional polishing and sand blasting, the mildew spot cleaning agent disclosed by the invention is high in cleaning efficiency.
The mildew spot cleaning agent disclosed by the invention has the advantages that the additive is compounded by hydroxyethylidene diphosphonic acid and citric acid, the hydroxyethylidene diphosphonic acid and the citric acid have a synergistic effect, the cleaning effect can be improved, and the mildew spot cleaning agent can be applied to removing mildew spots. Compared with the existing rare metal cleaning agent and chromium cleaning agent, the mildew spot cleaning agent has the advantages of good effect and low cost, the aluminum alloy cleaned by the mildew spot cleaning agent does not change color, mildew spots and oil stains are thoroughly cleaned, the mildew spot cleaning agent can be used for renovating corroded aluminum alloy, and the mildew spot cleaning agent is low in cost and high in efficiency.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below. The examples, in which specific conditions are not specified, were conducted under conventional conditions or conditions recommended by the manufacturer. The reagents or instruments used are not indicated by the manufacturer, and are all conventional products available commercially.
The embodiment can provide a mildew spot cleaning agent, which comprises nitric acid or nitrate, citrate, thiourea, sulfamic acid, an additive and an emulsifier, wherein the additive is prepared by compounding hydroxyethylidene diphosphonic acid and citric acid.
The additive is compounded by hydroxyethylidene diphosphonic acid and citric acid, the hydroxyethylidene diphosphonic acid and the citric acid have a synergistic effect, the cleaning effect can be improved, and particularly, the hydroxyethylidene diphosphonic acid and the citric acid have very good performances of complex solubilization, solution limit effect, lattice distortion and the like, have certain dispersion and suspension force, have functions of scale inhibition, corrosion inhibition and scale removal, do not lose activity at a higher temperature (such as 200 ℃), are basically nontoxic and have no pollution.
Further, comprising:
17-19 g/L of nitric acid or nitrate;
3-6 g/L of citrate;
0.1-2 g/L of thiourea;
0.1-0.2 g/L sulfamic acid;
0.5-1.5 g/L of additive;
0.5-1 g/L of emulsifier.
Further, the additive comprises hydroxyethylidene diphosphonic acid and citric acid according to the weight ratio of (1-2): (1-3) are compounded.
Further, the emulsifier is akksuo Berol 226SA surfactant.
Nitric acid or nitrate, citrate, thiourea, sulfamic acid, additives, emulsifiers and the like are applied in the existing cleaning agent, but a certain degreasing effect can be achieved only by needing a larger concentration, such as 10wt% and 8wt% of nitric acid; thiourea concentration is 1wt%, 2wt%, etc., and even at a relatively large concentration, the mold release is not possible or the mold release effect is not satisfactory. This application can adopt prior art ten times concentration can enough realize the effect of deoiling dirty, going the mildew.
According to the cleaning agent, the compound emulsifier is added, so that the using amount of each component can be obviously reduced, the cost is reduced, the environmental influence is reduced, and the cleaning effect is improved.
The Aksu Berol 226SA surfactant is a high-efficiency oil removal cleaning surfactant, and generally needs to be as high as 5-13wt% even if the oil removal concentration is high.
The Aksu Berol 226SA surfactant has affinity to two phases through different parts in a molecule, so that the two phases are both regarded as components of the phase, the molecules are arranged between the two phases, the surfaces of the two phases are equivalently transferred into the interior of the molecules, and the surface tension is reduced. Since both phases are considered as a component of the phase, this corresponds to both phases not forming an interface with the surfactant molecules, and to the partial elimination of the interface of the two phases in this way, reducing the surface tension and the surface free energy.
Further, the citrate is at least one of sodium citrate and ammonium citrate.
Further, the nitrate is at least one of sodium nitrate and ammonium nitrate.
This example can provide a method of making a mildew stain cleaner according to any of the preceding embodiments by adding citrate, nitrate, thiourea, sulfamic acid, emulsifiers and additives to water and mixing to obtain the cleaner.
In order to make the hydroxyethylidene diphosphonic acid and the citric acid in the additive fully interact, the hydroxyethylidene diphosphonic acid and the citric acid are firstly prepared into the additive.
Further, the mixing step is to stir the solution for 5-10min.
The embodiment can provide a cleaning method of the alloy, and the part to be cleaned of the alloy is contacted with any cleaning agent in the previous embodiment.
Further, the alloy is an aluminum alloy;
preferably, the temperature of the cleaning agent is 35-45 ℃.
Further, after the part to be cleaned of the alloy is contacted with a cleaning agent, the part to be cleaned is passivated.
The features and properties of the present invention are described in further detail below with reference to examples.
Example 1
A mildew spot cleaning solution comprises the following components: the additive is prepared from 18g/L of nitrate, 4g/L of citrate, 1g/L of thiourea, 0.15g/L of sulfamic acid, 1g/L of additive, 0.5g/L of Acroso Berol 226SA surfactant and the balance of deionized water, wherein the additive is prepared by compounding and mixing HEDP and citric acid according to a weight ratio of 1.
A preparation method of a mildew cleaning solution for an aluminum alloy surface comprises the following steps:
(1.1) preparing raw materials of each component according to the proportion;
(1.2) compounding and mixing HEDP and citric acid according to the weight ratio of 1;
(1.3) sequentially adding citrate, nitrate, thiourea, sulfamic acid, emulsifier and additive into water, stirring after adding to fully dissolve all the components, and stirring for about 10 min;
(1.4) obtaining the mildew cleaning agent.
The mildew cleaning solution is used for cleaning the surface of the aluminum alloy, and specifically comprises the following steps:
(A1) Mildew spot cleaning: heating the aluminum alloy cleaning agent solution to 40 ℃, then completely soaking the ADC12 aluminum alloy casting with the size of 10 multiplied by 4 multiplied by 0.5 cm into the solution, keeping the temperature of the solution at 40 ℃, taking out the aluminum alloy casting after soaking for 5min, and washing with deionized water.
(A2) Aluminum alloy passivation: and (2) completely immersing the aluminum alloy casting cleaned in the step (A1) into an aluminum alloy passivation solution at normal temperature, taking out the aluminum alloy casting after soaking for 60s, washing with deionized water, taking out and drying.
Example 2
A mildew spot cleaning solution comprises the following components: 17g/L of nitrate, 3g/L of citrate, 2g/L of thiourea, 0.2g/L of sulfamic acid, 1.5g/L of additive, 1g/L of Acroso Berol 226SA surfactant and the balance of deionized water, wherein the additive is prepared by compounding and mixing HEDP and citric acid according to a weight ratio of 1.5.
A preparation method of a mildew cleaning solution for an aluminum alloy surface comprises the following steps:
(1.1) preparing raw materials of each component according to the proportion;
(1.2) compounding and mixing HEDP and citric acid according to the weight ratio of 1.5 to obtain an additive;
(1.3) adding citrate, nitrate, thiourea, sulfamic acid, emulsifier and additive into water, stirring after adding to fully dissolve all the components, and stirring for about 10 min;
(1.4) obtaining the mildew cleaning agent.
The mildew cleaning solution is used for cleaning the surface of the aluminum alloy, and specifically comprises the following steps:
(A1) Cleaning mildew spots: heating the aluminum alloy cleaning agent solution to 45 ℃, then completely soaking the ADC12 aluminum alloy casting with the size of 10 multiplied by 4 multiplied by 0.5 cm into the solution, keeping the temperature of the solution at 40 ℃, taking out the aluminum alloy casting after soaking for 5min, and washing with deionized water.
(A2) Aluminum alloy passivation: and (2) completely soaking the aluminum alloy casting cleaned in the step (A1) into an aluminum alloy passivation solution at normal temperature, taking out the aluminum alloy casting after soaking for 60s, washing with deionized water, taking out and drying.
Example 3
A mildew spot cleaning solution comprises the following components: 19g/L of nitrate, 6g/L of citrate, 0.1g/L of thiourea, 0.1g/L of sulfamic acid, 0.5g/L of additive, 0.5g/L of Ackso Berol 226SA surfactant and the balance of deionized water, wherein the additive is prepared by mixing HEDP and citric acid according to the weight ratio of 1.
A preparation method of a mildew cleaning solution for an aluminum alloy surface comprises the following steps:
(1.1) preparing raw materials of each component according to the proportion;
(1.2) compounding and mixing HEDP and citric acid according to the weight ratio of 1;
(1.3) adding citrate, nitrate, thiourea, sulfamic acid, emulsifier and additive into water, stirring after adding to fully dissolve all the components, and stirring for about 10 min;
and (1.4) obtaining the mildew cleaning agent.
The mildew cleaning solution is used for cleaning the surface of the aluminum alloy, and specifically comprises the following steps:
(A1) Cleaning mildew spots: heating the aluminum alloy cleaning agent solution to 35 ℃, then completely soaking the ADC12 aluminum alloy casting with the size of 10 multiplied by 4 multiplied by 0.5 cm into the solution, keeping the temperature of the solution at 35 ℃, taking out the aluminum alloy casting after soaking for 5min, and washing with deionized water.
(A2) Aluminum alloy passivation: and (2) completely immersing the aluminum alloy casting cleaned in the step (A1) into an aluminum alloy passivation solution at normal temperature, taking out the aluminum alloy casting after soaking for 60s, washing with deionized water, taking out and drying.
Comparative example 1
A mildew spot cleaning solution comprises the following components: the additive is prepared from 18g/L of nitrate, 4g/L of citrate, 1g/L of thiourea, 0.15g/L of sulfamic acid, 1g/L of additive, 0.5g/L of Acroso Berol 226SA surfactant and the balance of deionized water, wherein the additive is prepared by compounding and mixing HEDP and citric acid according to a weight ratio of 1.
A preparation method of a mildew cleaning solution for an aluminum alloy surface comprises the following steps:
(1.1) preparing raw materials of each component according to the proportion;
(1.2) adding nitrate, thiourea, citric acid, sulfamic acid, HEDP, citric acid and Aksu 226 surfactant into water, stirring to fully dissolve the components, and stirring for about 10 min;
and (1.3) obtaining the mildew cleaning agent.
The mildew cleaning solution is used for cleaning the surface of the aluminum alloy, and specifically comprises the following steps:
(A1) Cleaning mildew spots: heating the aluminum alloy cleaning agent solution to 40 ℃, then completely soaking the ADC12 aluminum alloy casting with the size of 10 multiplied by 4 multiplied by 0.5 cm into the solution, keeping the temperature of the solution at 40 ℃, taking out the aluminum alloy casting after soaking for 5min, and washing with deionized water.
(A2) Aluminum alloy passivation: and (2) completely immersing the aluminum alloy casting cleaned in the step (A1) into an aluminum alloy passivation solution at normal temperature, taking out the aluminum alloy casting after soaking for 60s, washing with deionized water, taking out and drying.
Comparative example 2
A mildew spot cleaning solution comprises the following components: the additive is prepared from 18g/L of nitrate, 4g/L of citrate, 1g/L of thiourea, 0.15g/L of sulfamic acid, 1g/L of additive, 0.5g/L of fatty alcohol polyoxyethylene polyoxypropylene ether and the balance of deionized water, wherein the additive is prepared by compounding and mixing HEDP and citric acid according to a weight ratio of 1.
A preparation method of a mildew cleaning solution for an aluminum alloy surface comprises the following steps:
(1.1) preparing raw materials of all components according to the proportion;
(1.2) compounding and mixing HEDP and citric acid according to the weight ratio of 1;
(1.3) adding citrate, nitrate, thiourea, sulfamic acid, emulsifier and additive into water, stirring after adding to fully dissolve all the components, and stirring for about 10 min;
(1.4) obtaining the mildew cleaning agent.
The mildew cleaning solution is used for cleaning the surface of the aluminum alloy, and specifically comprises the following steps:
(A1) Mildew spot cleaning: heating the aluminum alloy cleaning agent solution to 40 ℃, then completely soaking the ADC12 aluminum alloy casting with the size of 10 multiplied by 4 multiplied by 0.5 cm into the solution, keeping the temperature of the solution at 40 ℃, taking out the aluminum alloy casting after soaking for 5min, and washing with deionized water.
(A2) Aluminum alloy passivation: and (2) completely immersing the aluminum alloy casting cleaned in the step (A1) into an aluminum alloy passivation solution at normal temperature, taking out the aluminum alloy casting after soaking for 60s, washing with deionized water, taking out and drying.
Testing one:
the mildew area in each of examples 1 to 3 and comparative examples 1 to 2 was 20cm 2 On the left and right, the time taken for the mildew to disappear is shown in Table 1.
TABLE 1 area of mildew disappearance and time taken for mildew disappearance
As can be seen from comparison between example 1 and comparative example 1, when HEDP and citric acid are added into the cleaning agent separately, compared with the method in which HEDP and citric acid are compounded and then added into the cleaning agent, the mildew stains disappear for a long time, and the cleaning effect is poor; it can be seen from example 1 and comparative example that when the emulsifier is replaced with other components than Acksu 226 surfactant, the mildew disappearance time is long and the cleaning effect is remarkably reduced.
And (2) testing:
the cleaned aluminum alloys of example 1, comparative example 1 and comparative example 2 were placed in a neutral salt spray experimental test chamber for performance testing, and the results are shown in table 2.
Testing the corrosion resistance of neutral salt spray:
the temperature in the test chamber was maintained at 35 c and the compressed air was preheated to between 45 c and adjusted to a sufficient pressure.
The mass concentration of the sodium chloride solution is 5% +/-1%, and the pH value of the solution after condensation is 6.5-7.2. During the salt spray test, the fog reduction amount should be controlled within the following range of every 80cm 2 In the horizontal plane, the average mist reduction amount collected per hour is between 1.0 and 2.0 ml. The sample is placed in a test box for continuous spraying, observed every 8 hours, and the corroded area is observed, and if the corroded area exceeds 5 percent, the salt spray test is stopped.
And (3) testing:
the aluminum alloys cleaned in example 1, comparative example 1 and comparative example 2 are subjected to paint baking treatment, and then the sample is subjected to a bonding force test according to GB/T9286-1998, namely lines which are vertical and horizontal are marked on the coating film of a test piece at intervals of 1mm, and whether the brittleness of the coating film and the adhesion performance to the material are good or not is judged according to the size of crack extension at a broken part. The combination grades are classified into 0-5 grades, with 5B being the best and 0B being the worst.
Table 2 results of tests on neutral salt spray corrosion resistance and coating adhesion of the aluminum alloys cleaned in example 1, comparative example 1 and comparative example 2
| Item | Example 1 | Comparative example 1 | Comparative example 2 |
| Time of neutral salt spray (h) | 120 | 72 | 48 |
| Coating binding force | 5B | 5B | 5B |
As shown in the table, the inventor unexpectedly finds that the additive compounded by HEDP and citric acid can better clean the surface mildew when being added into the mildew cleaning agent, further improves the performance and adhesive force of the later passivated salt spray after cleaning, and can realize industrial production.
The above is only a preferred embodiment of the present invention, and is not intended to limit the present invention, and various modifications and changes will occur to those skilled in the art. 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 (10)
1. The mildew spot cleaning agent is characterized by comprising nitric acid or nitrate, citrate, thiourea, sulfamic acid, an additive and an emulsifier, wherein the additive is prepared by compounding hydroxyethylidene diphosphonic acid and citric acid.
2. The mold stain cleaner of claim 1, comprising:
17-19 g/L of nitric acid or nitrate;
3-6 g/L of citrate;
0.1-2 g/L of thiourea;
0.1-0.2 g/L sulfamic acid;
0.5-1.5 g/L of additive;
0.5-1 g/L of emulsifier;
preferably, the additive is prepared from hydroxyethylidene diphosphonic acid and citric acid in a weight ratio of (1-2):
(1-3) compounding.
3. The mildew cleaning agent according to claim 1, wherein the emulsifier is Aksu Berol 226SA surfactant.
4. The mildew stain cleaner of claim 1 wherein the citrate is at least one of sodium citrate and ammonium citrate.
5. The mildew cleaning agent according to claim 1, wherein the nitrate is at least one of sodium nitrate and ammonium nitrate.
6. A method of making a mould spot cleaning formulation according to any one of claims 1 to 5 characterised in that citrate, nitrate, thiourea, sulphamic acid, emulsifiers and additives are added to water and mixed to give a cleaning formulation.
7. The method for preparing mildew spot cleaning agent according to claim 6, wherein the mixing step is stirring the solution for 5-10min.
8. A method for cleaning an alloy, which is characterized in that a part to be cleaned of the alloy is contacted with the cleaning agent as claimed in any one of claims 1 to 7.
9. The method of cleaning an alloy according to claim 8, wherein the alloy is an aluminum alloy;
preferably, the temperature of the cleaning agent is 35-45 ℃.
10. The method for cleaning an alloy as set forth in claim 8, wherein the cleaning agent is used to passivate the portion of the alloy to be cleaned after the portion of the alloy to be cleaned is contacted with the cleaning agent.
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Application publication date: 20221118 |