CN103014590A - Method for thermally spraying monel metal coating on surface of stainless steel - Google Patents
Method for thermally spraying monel metal coating on surface of stainless steel Download PDFInfo
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- CN103014590A CN103014590A CN2011102874177A CN201110287417A CN103014590A CN 103014590 A CN103014590 A CN 103014590A CN 2011102874177 A CN2011102874177 A CN 2011102874177A CN 201110287417 A CN201110287417 A CN 201110287417A CN 103014590 A CN103014590 A CN 103014590A
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- 238000000576 coating method Methods 0.000 title claims abstract description 65
- 239000011248 coating agent Substances 0.000 title claims abstract description 62
- 229910000792 Monel Inorganic materials 0.000 title claims abstract description 54
- 239000010935 stainless steel Substances 0.000 title claims abstract description 37
- 229910001220 stainless steel Inorganic materials 0.000 title claims abstract description 37
- 238000000034 method Methods 0.000 title claims abstract description 34
- 238000005507 spraying Methods 0.000 title claims abstract description 24
- 238000007789 sealing Methods 0.000 claims abstract description 9
- 238000007751 thermal spraying Methods 0.000 claims abstract description 7
- 230000008569 process Effects 0.000 claims description 15
- 238000005202 decontamination Methods 0.000 claims description 10
- 230000003588 decontaminative effect Effects 0.000 claims description 10
- 238000010891 electric arc Methods 0.000 claims description 7
- NPXOKRUENSOPAO-UHFFFAOYSA-N Raney nickel Chemical compound [Al].[Ni] NPXOKRUENSOPAO-UHFFFAOYSA-N 0.000 claims description 6
- 238000005555 metalworking Methods 0.000 claims description 5
- 239000003960 organic solvent Substances 0.000 claims description 3
- TWNQGVIAIRXVLR-UHFFFAOYSA-N oxo(oxoalumanyloxy)alumane Chemical compound O=[Al]O[Al]=O TWNQGVIAIRXVLR-UHFFFAOYSA-N 0.000 claims description 3
- 238000012545 processing Methods 0.000 claims description 3
- 239000000463 material Substances 0.000 abstract description 6
- 239000011148 porous material Substances 0.000 abstract description 4
- 239000000758 substrate Substances 0.000 abstract description 3
- 238000012360 testing method Methods 0.000 abstract description 3
- 239000000945 filler Substances 0.000 abstract 1
- 238000000386 microscopy Methods 0.000 abstract 1
- 238000005488 sandblasting Methods 0.000 abstract 1
- 238000005260 corrosion Methods 0.000 description 13
- 230000007797 corrosion Effects 0.000 description 12
- 239000011159 matrix material Substances 0.000 description 10
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 7
- 239000002245 particle Substances 0.000 description 6
- 239000007921 spray Substances 0.000 description 6
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 5
- 229910045601 alloy Inorganic materials 0.000 description 5
- 239000000956 alloy Substances 0.000 description 5
- KRHYYFGTRYWZRS-UHFFFAOYSA-N Fluorane Chemical compound F KRHYYFGTRYWZRS-UHFFFAOYSA-N 0.000 description 4
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 description 4
- 239000012298 atmosphere Substances 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 229910052742 iron Inorganic materials 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 229910052751 metal Inorganic materials 0.000 description 3
- 239000002184 metal Substances 0.000 description 3
- 239000003921 oil Substances 0.000 description 3
- 239000007858 starting material Substances 0.000 description 3
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 2
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 description 2
- PWHULOQIROXLJO-UHFFFAOYSA-N Manganese Chemical group [Mn] PWHULOQIROXLJO-UHFFFAOYSA-N 0.000 description 2
- 229910000934 Monel 400 Inorganic materials 0.000 description 2
- 229910052799 carbon Inorganic materials 0.000 description 2
- 229910052802 copper Inorganic materials 0.000 description 2
- 239000010949 copper Substances 0.000 description 2
- OANFWJQPUHQWDL-UHFFFAOYSA-N copper iron manganese nickel Chemical compound [Mn].[Fe].[Ni].[Cu] OANFWJQPUHQWDL-UHFFFAOYSA-N 0.000 description 2
- 230000002950 deficient Effects 0.000 description 2
- 239000008393 encapsulating agent Substances 0.000 description 2
- 239000012530 fluid Substances 0.000 description 2
- 238000007542 hardness measurement Methods 0.000 description 2
- 229910052748 manganese Inorganic materials 0.000 description 2
- 239000011572 manganese Substances 0.000 description 2
- 238000002844 melting Methods 0.000 description 2
- 239000007769 metal material Substances 0.000 description 2
- 229910052759 nickel Inorganic materials 0.000 description 2
- 230000003647 oxidation Effects 0.000 description 2
- 238000007254 oxidation reaction Methods 0.000 description 2
- 229910052710 silicon Inorganic materials 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- YCKRFDGAMUMZLT-UHFFFAOYSA-N Fluorine atom Chemical compound [F] YCKRFDGAMUMZLT-UHFFFAOYSA-N 0.000 description 1
- 229910000990 Ni alloy Inorganic materials 0.000 description 1
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 1
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 1
- 239000005864 Sulphur Substances 0.000 description 1
- 238000009825 accumulation Methods 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- 229910021529 ammonia Inorganic materials 0.000 description 1
- 238000004176 ammonification Methods 0.000 description 1
- 238000004458 analytical method Methods 0.000 description 1
- 230000002421 anti-septic effect Effects 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 229910052804 chromium Inorganic materials 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 238000010205 computational analysis Methods 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 239000010779 crude oil Substances 0.000 description 1
- 230000008021 deposition Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 239000011737 fluorine Substances 0.000 description 1
- 229910052731 fluorine Inorganic materials 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 239000004615 ingredient Substances 0.000 description 1
- 238000002955 isolation Methods 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 239000013528 metallic particle Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 239000003129 oil well Substances 0.000 description 1
- 238000007750 plasma spraying Methods 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 239000010703 silicon Substances 0.000 description 1
- 238000010186 staining Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 230000008719 thickening Effects 0.000 description 1
Landscapes
- Coating By Spraying Or Casting (AREA)
Abstract
The invention relates to a method for thermally spraying a monel metal coating on the surface of the stainless steel. The method comprises the following steps: decontaminating the surface of a stainless steel substrate, sand-blasting and roughing the decontaminated stainless steel substrate, thermally spraying a nickel-aluminum bond coating on the roughed surface, thermally spraying a monel metal work coating to cover the bond coating, and carrying out sealing treatment on the monel metal coating. By adopting the method provided by the invention, the test of metallurgical microscopy and microhardness proves that the monel metal coating prepared on the surface of the stainless steel can effectively reduce the pore and cavity of the coating, and can effectively seal the pore and cavity of the surface by using the hole-sealing filler. As the coating hardness is influenced by the characteristics of the thermal spraying, the coating has material oxide inclusion, and the coating hardness is improved by 1.426 times in comparison with that of the primary monel metal.
Description
Technical field
The present invention relates to a kind of method in stainless steel surface thermospray Monel metal coating.
Background technology
Hot-spraying techniques is trickle and metal or nonmetallic coated material that disperse with a kind of fusing or semi-molten state, deposit to a kind of matrix surface through preparation, forms certain spray deposited layer.It is to utilize certain thermal source (such as electric arc, plasma spraying or combustion flame etc.) that Powdered or thread metal or non-metallic material are heated to melting or semi-melting state, then be ejected into pretreated matrix surface by flame stream itself or pressurized air with certain speed, deposition and the process of the top coat with various functions of forming.
The constructional feature of hot spray coating: the hot spray coating forming process has determined the constructional feature of coating; sprayed coating is to have countless deformed shaped particles to intermesh to be the stacking lamellar structure's structure together of wave; inevitably there are some holes and cavity in the coating between particle and the particle, and with oxide inclusion.The characteristics of coating profile structure are:
1. be stratiform;
2. contain oxide inclusion;
3. contain hole or pore.
Along with updating with perfect of hot-spraying techniques, its Application Areas is constantly expanded.Along with the enforcement of contemporary energy-saving and emission-reduction policy, thermospray is conducive to product greatly as process for modifying surface to be made and the resources conservation of later stage in repairing, and the development of national economy is had important effect.
The submersible electric pump technology has had nearly 30 years history so far since 1981 introduce China, over nearly 30 years, submersible electric pump is widely applied in the oil field mainly as important artificial lift equipment.Data shows according to statistics, ends for the end of the year 1996, and the existing submersible electric pump of China advances nearly 3700 mouthfuls, and only Daqing oil field just has nearly 1700 mouthfuls, accounts for 10% of mechanical oil well sum, and the production fluid amount accounts for 30% of total fluid production, and becoming the oil field is one of important means of high yield, stable yields.
Because down-hole high temperature, corrosion and wearing and tearing may cause the motor infringement, the down-hole outside atmosphere is often with high temperature and extremely harsh abominable corrosive environment.Therefore the anti-corrosive treatment of submersible electric pump appearance just seemed particularly important.
Monel metal claims again nickelalloy, is a kind of alloy that other elements such as copper, iron, manganese form that adds take metallic nickel as matrix.This alloy has extremely outstanding solidity to corrosion in fluorine gas, hydrochloric acid, sulfuric acid, hydrofluoric acid and their growth.Acid medium: Monel metal all is anti-corrosion in concentration in less than 85% sulfuric acid.But Monel metal is to be one of few important materials of number in the hydrofluoric acid resistant.Aqueous corrosion: Monel metal is in most aqueous corrosion situations, not only solidity to corrosion is splendid, and pitting, stress corrosion etc. are also seldom found, corrosion speed is less than the 0.025mm/a high temperature corrosion: the top temperature of Monel metal non-stop run in air is generally about 600 ℃, in high-temperature steam, corrosion speed is less than 0.026mm/a.Ammonia: because Monel metal nickel content is high, so can anti-anhydrous ammonia below 585 ℃ and the ammonification condition under corrosion.
Because a lot of parts of submersible electric pump all follow crude oil directly to contact, and the part parts end in depth, be subjected to the impact of underground heat and underground harsh corrosive environment.Use at first part that stainless material makes in depth lower parts can't bear underground harsh corrosive environment, changing into afterwards and selecting Monel metal is the starting material making, can effectively resist corrosion.But stainless 10 times of the close prices of Monel metal, this is so that the cost of submersible electric pump has very significantly raising.Concerning the market of present China narrow resources, research and develop a kind of more novel, save, handy again process program is the task of top priority really.
Summary of the invention
Technical problem to be solved by this invention is stainless steel submersible electric pump outside surface is carried out the improvement of coating process, saves manufacturing cost under the constant prerequisite of Corrosion Protection.Improve the constructional feature defective of coating, coating is fine and close, reduce the coating oxidation thing and be mingled with, reduce hole and cavity, and existing hole cavity filled sealing treatment, strengthen the bonding strength of coating, a kind of method of stainless steel surface thermospray Monel metal coating is provided, to realize that the parts product antiseptic property of submersible electric pump take stainless steel as substrate surface thermospray Monel metal coating can be suitable with Monel metal.
Technical solution of the present invention is as follows: the method for stainless steel surface thermospray Monel metal coating comprises the following steps:
(1) decontamination being carried out in stainless steel-based surface processes.
(2) stainless steel base after the decontamination being carried out sandblast texturing processes.
(3) to the thermal spraying on surface nickel aluminium prime coat after the texturing.
(4) thermospray covers the Monel metal working lining on prime coat.
(5) the Monel metal coating is carried out sealing treatment.
Further, above-mentioned steps (1) is carried out the decontamination processing to stainless steel-based surface, with an organic solvent carries out wiping.
Further, above-mentioned steps (2) is carried out the sandblast texturing processing to the stainless steel base after the decontamination.Use the aluminum oxide emergy, granularity is 0.5mm ~ 1.5mm, sandblast air pressure 0.6 ~ 0.7Mpa.Roughness is controlled at 50 ~ 120um behind the sandblast texturing.
Further, above-mentioned steps (3) is to the thermal spraying on surface nickel aluminium prime coat after the texturing.Stainless steel surface after using electric arc spraying equipment to texturing uses the ni-al alloyed wire bottoming, spraying air pressure 0.6Mpa, the thickness 0.03 ~ 0.08mm of prime coat.
Further, above-mentioned steps (4) thermospray on prime coat covers the Monel metal working lining.Use electric arc spraying equipment at prime coat spraying Monel metal coating, coat-thickness 0.3mm.
The technology of the present invention effect:
The coating of making is carried out microscopic test observe the coating situation: with metaloscope, micro-hardness testing, hole and cavity that the Monel metal coating that the inventive method prepares at stainless steel surface effectively reduces and reduced coating, and use the sealing of hole weighting agent, effectively hole and the cavity of effects on surface are sealed.This coating hardness exists material oxide to be mingled with owing to affected by the thermospray essential characteristic in the coating, coating hardness has improved 1.426 times than former Monel metal.
Embodiment
The invention will be further described below in conjunction with embodiment.
The method of embodiment 1. stainless steel surface thermospray Monel metal coatings, stainless steel is 1Cr18Ni9, its composition is:
C≤0.12% Si≤1.0% Mn≤2.0%
S≤0.03% P≤0.035% Cr:17.00～19.00%
Ni:8.00～11.00% Fe: surplus
Nickel aluminium prime coat alloy is: Ni:95% Al:5%
Monel metal is standard brand Monel 400 alloys, chemical ingredients such as following table:
| Element | Content (%) |
| Nickel | 63min |
| Copper | 28min~34max |
| Iron | 2.5max |
| Manganese | 2.0max |
| Carbon | 0.3max |
| Silicon | 0.5max |
| Sulphur | 0.024max |
The present invention includes the following step:
(1) decontamination is carried out in stainless steel-based surface and process, with an organic solvent carry out wiping.
(2) stainless steel base after the decontamination being carried out sandblast texturing processes.Use the aluminum oxide emergy, granularity is 0.5mm ~ 1.5mm, sandblast air pressure 0.6 ~ 0.7Mpa.Roughness is controlled at 50 ~ 120um behind the sandblast texturing.
(3) to the thermal spraying on surface nickel aluminium prime coat after the texturing.Stainless steel surface after using electric arc spraying equipment to texturing uses the ni-al alloyed wire bottoming, spraying air pressure 0.6Mpa, the thickness 0.03 ~ 0.08mm of prime coat.
(4) thermospray covers the Monel metal working lining on prime coat.Use electric arc spraying equipment at prime coat spraying Monel metal coating, coat-thickness 0.3mm.
Spray voltage: 26V wire feed voltage: 24V spraying coating line speed: 1 meter per second
Spray angle: 90 ± 10o spray distance: 220mm
Spraying air pressure 0.6Mpa ~ 0.7Mpa.
(5) the Monel metal coating is carried out sealing treatment.
Embodiment 2. is according to parameter among the embodiment 1, and the Monel metal coat-thickness sprays 0.1mm, and other parameters are with example 1.
Embodiment 3. does not carry out sealing treatment according to parameter among the embodiment 1 at last to the Monel coating, and other parameters are with example 1.
Observe after making metallographic specimen, metallograph is through the computational analysis of computer staining, and porosity is 3.5%, is higher than the technique of conventional arc thermospray porosity about 5%.The sample of comparison example 1 and 2 two kinds of different Monel metal coat-thicknesses of example finds that coating porosity is basically identical, but the pattern in the hole of two kinds of coatings and cavity is essentially different.The aperture equalization of making in the example 1 in the 0.3mm coat-thickness sample is dispersed throughout in the whole coating, but the hole in the coating area of outmost surface is not communicated to beneath stainless steel base.Think by analysis, the Monel hot spray coating is that (semicure refers in thermal spray process by the semicure metallic particles that flies at a high speed after cracked ends does not melt, after metal or stupalith melt through thermal source, form drop through high speed flame stream and air atomizing, the particle that solidifies in the appearance that forms after being subjected to exterior cooling to the matrix process of flying) piles up the coating that forms, in the process of piling up, can constantly form hole and cavity, along with the back flies to the accumulation of the particle of matrix, hole before can be filled or cover by follow-up particle, thereby cause in whole process, constantly producing hole, and hole is constantly capped.Along with the thickening of coating, the probability that is communicated to the hole existence of matrix will be more and more less like this.Observe the Monel metal coating in the example 1, do not have porosity communication to matrix, and thickness is the Monel metal coating of 0.1mm in the example 2, have part to be communicated to the hole of matrix, the appearance of these holes will cause greatly to the stainless protection defective of matrix.
Two groups of samples of paired observation example 1 and example 3 have been filled encapsulant in the hole of Monel coating outside surface in the example 1, and whole coating and outside atmosphere separate, and the sample appearance hole in the example 3 is exposed in the outside atmosphere.
Sample in the example 3 is carried out micro-hardness testing, test data HV550, this compares about starting material Monel 400 alloy rigidity HRC35 and improves nearly 1.5 times, has increased the wear resisting property of coating.
Conclusion
1. use the process heat spraying Monel metal coating that is fit to effectively to reduce the porosity of coating, make hole not connect whole coating to matrix.Make like this Monel metal coating cover stainless steel-based surface fully, make stainless steel base and outside atmosphere isolated.
2. using encapsulant sealing Monel metal coating can be the pore closure covering of Monel metal coating appearance, better stainless steel base is played isolation action.
3. the Monel metal material is after thermospray, and the coating hardness that the part material forms after oxidation is higher than starting material, can better play anti abrasive performance.
4. use suitable technique on machinery and quantitative measurement, can replace former Monel metal parts in submersible electric pump parts of stainless steel thermal spraying on surface Monel metal coating.
Claims (5)
1. the method for a stainless steel surface thermospray Monel metal coating, the method comprises the following steps:
(1) decontamination being carried out in stainless steel-based surface processes;
(2) stainless steel base after the decontamination being carried out sandblast texturing processes;
(3) to the thermal spraying on surface nickel aluminium prime coat after the texturing;
(4) thermospray covers the Monel metal working lining on prime coat;
(5) the Monel metal coating is carried out sealing treatment.
2. the method for a kind of stainless steel surface thermospray Monel metal coating according to claim 1 is characterized in that, described step (1) is carried out the decontamination processing to stainless steel-based surface, with an organic solvent carries out wiping.
3. the method for a kind of stainless steel surface thermospray Monel metal coating according to claim 1 is characterized in that, described step (2) is carried out sandblast texturing to the stainless steel base after the decontamination and processed; Use the aluminum oxide emergy, granularity is 0.5mm ~ 1.5mm, sandblast air pressure 0.6 ~ 0.7Mpa; Roughness is controlled at 50 ~ 120um behind the sandblast texturing.
4. the method for a kind of stainless steel surface thermospray Monel metal coating according to claim 1 is characterized in that, described step (3) is to the thermal spraying on surface nickel aluminium prime coat after the texturing; Stainless steel surface after using electric arc spraying equipment to texturing uses the ni-al alloyed wire bottoming, spraying air pressure 0.6Mpa, the thickness 0.03 ~ 0.08mm of prime coat.
5. the method for a kind of stainless steel surface thermospray Monel metal coating according to claim 1 is characterized in that, described step (4) thermospray on prime coat covers the Monel metal working lining; Use electric arc spraying equipment at prime coat spraying Monel metal coating, coat-thickness 0.3mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011102874177A CN103014590A (en) | 2011-09-26 | 2011-09-26 | Method for thermally spraying monel metal coating on surface of stainless steel |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011102874177A CN103014590A (en) | 2011-09-26 | 2011-09-26 | Method for thermally spraying monel metal coating on surface of stainless steel |
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| Publication Number | Publication Date |
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| CN103014590A true CN103014590A (en) | 2013-04-03 |
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| CN2011102874177A Pending CN103014590A (en) | 2011-09-26 | 2011-09-26 | Method for thermally spraying monel metal coating on surface of stainless steel |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103320739A (en) * | 2013-05-30 | 2013-09-25 | 中国船舶重工集团公司第七二五研究所 | Preparation method of anticorrosion nickel-based coating for marine environment |
| CN107475658A (en) * | 2017-07-11 | 2017-12-15 | 深圳仕上电子科技有限公司 | The electric arc combined coat processing method of solar panel processing unit (plant) |
| CN111485192A (en) * | 2020-05-15 | 2020-08-04 | 上海大学 | Preparation method of composite coating |
| CN113174618A (en) * | 2021-04-16 | 2021-07-27 | 安徽安风风机有限公司 | High-efficiency fan for HF acid-containing environment |
| CN115161732A (en) * | 2022-08-17 | 2022-10-11 | 中冶赛迪技术研究中心有限公司 | Coating suitable for Monel alloy surface and its preparation process |
| CN115305432A (en) * | 2022-08-16 | 2022-11-08 | 国网福建省电力有限公司电力科学研究院 | A rare earth nickel-based alloy wire suitable for arc spraying and preparation method thereof |
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| CN1958834A (en) * | 2005-11-03 | 2007-05-09 | 中冶京诚工程技术有限公司 | Flue heating surface alloy spraying method |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN1958834A (en) * | 2005-11-03 | 2007-05-09 | 中冶京诚工程技术有限公司 | Flue heating surface alloy spraying method |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103320739A (en) * | 2013-05-30 | 2013-09-25 | 中国船舶重工集团公司第七二五研究所 | Preparation method of anticorrosion nickel-based coating for marine environment |
| CN107475658A (en) * | 2017-07-11 | 2017-12-15 | 深圳仕上电子科技有限公司 | The electric arc combined coat processing method of solar panel processing unit (plant) |
| CN111485192A (en) * | 2020-05-15 | 2020-08-04 | 上海大学 | Preparation method of composite coating |
| CN113174618A (en) * | 2021-04-16 | 2021-07-27 | 安徽安风风机有限公司 | High-efficiency fan for HF acid-containing environment |
| CN115305432A (en) * | 2022-08-16 | 2022-11-08 | 国网福建省电力有限公司电力科学研究院 | A rare earth nickel-based alloy wire suitable for arc spraying and preparation method thereof |
| CN115161732A (en) * | 2022-08-17 | 2022-10-11 | 中冶赛迪技术研究中心有限公司 | Coating suitable for Monel alloy surface and its preparation process |
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Application publication date: 20130403 |