CN116005079A - High-temperature oxidation resistant coating with high conductivity and preparation method thereof - Google Patents
High-temperature oxidation resistant coating with high conductivity and preparation method thereof Download PDFInfo
- Publication number
- CN116005079A CN116005079A CN202310028647.4A CN202310028647A CN116005079A CN 116005079 A CN116005079 A CN 116005079A CN 202310028647 A CN202310028647 A CN 202310028647A CN 116005079 A CN116005079 A CN 116005079A
- Authority
- CN
- China
- Prior art keywords
- workpiece
- temperature oxidation
- powder
- resistant coating
- coating
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 238000000576 coating method Methods 0.000 title claims abstract description 92
- 239000011248 coating agent Substances 0.000 title claims abstract description 84
- 230000003647 oxidation Effects 0.000 title claims abstract description 59
- 238000007254 oxidation reaction Methods 0.000 title claims abstract description 59
- 238000002360 preparation method Methods 0.000 title abstract description 21
- 239000000843 powder Substances 0.000 claims abstract description 88
- 238000007747 plating Methods 0.000 claims abstract description 39
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 claims abstract description 20
- 229910052786 argon Inorganic materials 0.000 claims abstract description 10
- 239000012298 atmosphere Substances 0.000 claims abstract description 10
- 230000001681 protective effect Effects 0.000 claims abstract description 10
- 238000000151 deposition Methods 0.000 claims abstract description 3
- 239000000203 mixture Substances 0.000 claims description 13
- 229910018072 Al 2 O 3 Inorganic materials 0.000 claims description 12
- 238000000034 method Methods 0.000 claims description 12
- 229910000838 Al alloy Inorganic materials 0.000 claims description 11
- 229910003771 Gold(I) chloride Inorganic materials 0.000 claims description 11
- FDWREHZXQUYJFJ-UHFFFAOYSA-M gold monochloride Chemical compound [Cl-].[Au+] FDWREHZXQUYJFJ-UHFFFAOYSA-M 0.000 claims description 11
- 238000000227 grinding Methods 0.000 claims description 11
- 238000005498 polishing Methods 0.000 claims description 11
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 11
- 238000009792 diffusion process Methods 0.000 claims description 10
- 239000002245 particle Substances 0.000 claims description 9
- 238000005238 degreasing Methods 0.000 claims description 2
- 238000004519 manufacturing process Methods 0.000 claims description 2
- 229910000951 Aluminide Inorganic materials 0.000 description 10
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 description 9
- 230000003746 surface roughness Effects 0.000 description 9
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 8
- 239000010953 base metal Substances 0.000 description 8
- 229910001220 stainless steel Inorganic materials 0.000 description 8
- 229910045601 alloy Inorganic materials 0.000 description 7
- 239000000956 alloy Substances 0.000 description 7
- 239000010935 stainless steel Substances 0.000 description 7
- 230000007797 corrosion Effects 0.000 description 5
- 238000005260 corrosion Methods 0.000 description 5
- 238000005516 engineering process Methods 0.000 description 5
- 239000000446 fuel Substances 0.000 description 5
- 229910052751 metal Inorganic materials 0.000 description 5
- 239000002184 metal Substances 0.000 description 5
- 238000002474 experimental method Methods 0.000 description 4
- 230000003068 static effect Effects 0.000 description 4
- 230000007774 longterm Effects 0.000 description 3
- 239000011159 matrix material Substances 0.000 description 3
- 238000012986 modification Methods 0.000 description 3
- 230000004048 modification Effects 0.000 description 3
- 239000007787 solid Substances 0.000 description 3
- 229910004298 SiO 2 Inorganic materials 0.000 description 2
- 229910052782 aluminium Inorganic materials 0.000 description 2
- 239000012300 argon atmosphere Substances 0.000 description 2
- 230000004888 barrier function Effects 0.000 description 2
- 239000002131 composite material Substances 0.000 description 2
- 239000010410 layer Substances 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 241000501667 Etroplus Species 0.000 description 1
- 229910002796 Si–Al Inorganic materials 0.000 description 1
- 229910001069 Ti alloy Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 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
- 230000015572 biosynthetic process Effects 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
- 239000003054 catalyst Substances 0.000 description 1
- 239000011247 coating layer Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000006731 degradation reaction Methods 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000002001 electrolyte material Substances 0.000 description 1
- 238000009713 electroplating Methods 0.000 description 1
- 239000007769 metal material Substances 0.000 description 1
- 229910052759 nickel Inorganic materials 0.000 description 1
- 230000006911 nucleation Effects 0.000 description 1
- 238000010899 nucleation Methods 0.000 description 1
- 239000007800 oxidant agent Substances 0.000 description 1
- 230000001590 oxidative effect Effects 0.000 description 1
- TWNQGVIAIRXVLR-UHFFFAOYSA-N oxo(oxoalumanyloxy)alumane Chemical compound O=[Al]O[Al]=O TWNQGVIAIRXVLR-UHFFFAOYSA-N 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 229910052761 rare earth metal Inorganic materials 0.000 description 1
- 238000005245 sintering Methods 0.000 description 1
- 239000000758 substrate Substances 0.000 description 1
- 238000007751 thermal spraying Methods 0.000 description 1
- 238000012876 topography Methods 0.000 description 1
- 238000004073 vulcanization Methods 0.000 description 1
Images
Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/30—Hydrogen technology
- Y02E60/50—Fuel cells
Abstract
The invention discloses a high-temperature oxidation resistant coating with high conductivity and a preparation method thereof, wherein the high-temperature oxidation resistant coating with high conductivity comprises 15-25% of Al, 1-3% of Ni, 1-5% of Cr, 1-3% of Au and the balance of Fe element in percentage by mass; the preparation method of the high-temperature oxidation resistant coating with high conductivity comprises the following steps: 1) Pretreating the surface of a workpiece; 2) Immersing a workpiece in an Au plating solution for plating, and depositing an Au coating on the surface of the workpiece; 3) The workpiece deposited with the Au coating is buried in Al-containing powder and is diffused in an argon protective atmosphere to obtain the high-temperature oxidation resistant coating with high conductivity.
Description
Technical Field
The invention belongs to the technical field of high-temperature coatings, and relates to a high-temperature oxidation resistant coating with high conductivity and a preparation method thereof.
Background
In a solid oxide fuel cell, the connection plates should meet the following requirements: good conductivity, acceptable specific surface resistance should be less than 0.1mΩ/cm 2 The catalyst can be kept stable for 40000 hours at the working temperature of 800 ℃, and the excellent barrier property can prevent the direct combination of the oxidant and the fuel; the thermal expansion coefficient is matched with that of the electrode and the electrolyte material; the connection plate and the SOFC component cannot react and internally diffuse; good oxidation resistance, vulcanization resistance and carbon adhesion resistance. From the cost performance consideration, the connecting plate is generally made of a series of stainless steel materials with 18% -25% Cr content, but the contact resistance of the connecting plate is increased due to oxidation in the long-term service process, so that the battery efficiency is reduced.
In general, the formation of protective oxide films by selective high temperature oxidation of alloys is an important principle in designing high temperature alloys and their coatings. Increasing the content of the element selectively oxidized in the alloy or increasing the diffusion speed of the element selectively oxidized in the alloy, reducing the content of oxygen in the alloy and the diffusion speed of the element selectively oxidized, and increasing the nucleation rate of the oxide can promote the selective oxidation of the alloy. The selective oxide film with the best oxidation resistance comprises Al 2 O 3 、SiO 2 And Cr (V) 2 O 3 And (3) a film. However, in the case of titanium alloys, stainless steels, nickel-based alloys, and the like having low Cr, al, and Si contents, protective Al cannot be formed during oxidation 2 O 3 、SiO 2 And Cr (V) 2 O 3 The film can only improve the high-temperature oxidation resistance of the metal material through surface modification.
Aluminide coatings form Al primarily through the coating surface at high temperatures 2 O 3 The film provides protection. The alumina film is very dense, preventing further oxidation and corrosion. The aluminide coating may provide aluminum element forming an aluminum oxide film, continuously providing protection. The aluminide coating has good high temperature oxidation resistance, but has poorer hot corrosion resistance than the chromide coating. In general, improving the resistance of aluminide coatings to high temperature oxidation and hot corrosion is largely driven by two aspects: firstly, the binding force between the oxide film and the matrix is improved, and secondly, the internal diffusion of Al element in the coating is reduced, and the specific means comprise (1) adding Cr, si, pt or rare earth element to modify the aluminide coating so as to improve the binding force between the oxide film and the matrix; (2) The inner diffusion of Al element is inhibited by adding a diffusion barrier between the coating and the substrate. Modified aluminide coatings (Si-Al, cr-Al, pt-Al and the like) have been applied in batches abroad, and since the commercialization of aluminide coatings has been applied to date, modified aluminide coatings have been systematically optimized and developed in terms of preparation process technology, microstructure and composition control and the like, and serialized coatings have been formed.
Besides the thermal diffusion preparation process, the preparation methods of the high-temperature resistant coating are more, such as a composite thermal spraying technology, a composite electroplating technology, a sintering technology and the like, but the quality of the coating prepared by the technologies is poor, the problems of uneven thickness and non-compactness of the coating on the surface of a workpiece with a complex shape caused by a sight effect are solved, and the preparation difficulty of a device with a complex structure is particularly outstanding.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provide the high-temperature oxidation resistant coating with high conductivity and the preparation method thereof.
In order to achieve the aim, the high-temperature oxidation resistant coating with high conductivity comprises 15-25% of Al, 1-3% of Ni, 1-5% of Cr, 1-3% of Au and the balance of Fe element by mass percent.
The preparation method of the high-temperature oxidation resistant coating with high conductivity comprises the following steps:
1) Pretreating the surface of a workpiece;
2) Immersing a workpiece in an Au plating solution for plating, and depositing an Au coating on the surface of the workpiece;
3) And (3) embedding the workpiece deposited with the Au coating into Al-containing powder, and diffusing in an argon protective atmosphere to obtain the high-temperature oxidation resistant coating with high conductivity.
The specific operation of the step 1) is as follows: and (3) degreasing and derusting the surface of the workpiece, and grinding and polishing the surface of the workpiece.
In the step 2), the specific plating process is as follows: plating in water bath at 90-95 deg.c for 5-10 hr.
In the step 2), the Au plating solution is prepared from 5g/L AuCl 3 NH of 70g/L 4 Cl, 60g/L C6H5Na3O7, 15g/L NiCl 2 And 20g/L NaH2PO 2.
The specific process of diffusion in step 3) is: and the diffusion is carried out for 2 to 6 hours at the temperature of 850 to 1050 ℃.
The Al-containing powder comprises 1 to 3 percent of Al powder and 1 to 3 percent of NH by mass percent 4 Cl powder, NH4NO3 powder of 1% -3%, fe-Al alloy powder of 30% -40% and the balance of Al 2 O 3 Powder composition.
In step 3), the particle size of the Al-containing powder is less than 200 mesh.
The invention has the following beneficial effects:
according to the high-temperature oxidation resistant coating with high conductivity and the preparation method thereof, in the specific operation, au element and phases are introduced into the traditional aluminide coating, the advantage of excellent thermal stability of the Au element is fully utilized, the high-temperature oxidation resistant capability of the aluminide coating is further improved through Au modification, the degradation rate of the coating is reduced, and the solid oxidation is remarkably reducedThe contact resistance of the metal connector of the object fuel cell in long-term service period is compact in combination with the metal matrix, the coating thickness is uniform, the metal connector has excellent high-temperature oxidation resistance, and CrO in the fuel cell environment can be effectively solved 2 (OH) 2 The problem of rapid corrosion of the electrode plate caused by volatilization, and the specific resistance of the electrode plate after long-term corrosion at the high temperature of 800 ℃ is lower than 40mΩ/cm 2 The metal connector is used for the solid oxide fuel cell, and can prolong the service life of the metal connector.
Drawings
FIG. 1 is a topography of a 316L stainless steel surface coating according to an embodiment of the present invention;
FIG. 2 is a graph showing the morphology and composition characteristics of a coating after oxidation according to an embodiment of the present invention.
Detailed Description
In order to make the present invention better understood by those skilled in the art, the following description will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings, and it is apparent that the described embodiments are only some embodiments of the present invention, not all embodiments, but not intended to limit the scope of the present disclosure. In addition, in the following description, descriptions of well-known structures and techniques are omitted so as not to unnecessarily obscure the concepts of the present disclosure. All other embodiments, which can be made by those skilled in the art based on the embodiments of the present invention without making any inventive effort, shall fall within the scope of the present invention.
In the accompanying drawings, there is shown a schematic structural diagram in accordance with a disclosed embodiment of the invention. The figures are not drawn to scale, wherein certain details are exaggerated for clarity of presentation and may have been omitted. The shapes of the various regions, layers and their relative sizes, positional relationships shown in the drawings are merely exemplary, may in practice deviate due to manufacturing tolerances or technical limitations, and one skilled in the art may additionally design regions/layers having different shapes, sizes, relative positions as actually required.
The high-temperature oxidation resistant coating with high conductivity comprises 15-25% of Al, 1-3% of Ni, 1-5% of Cr, 1-3% of Au and the balance of Fe element by mass percent.
The preparation method of the high-temperature oxidation resistant coating with high conductivity comprises the following steps:
1) Oil and rust removal are carried out on the surface of the workpiece, and grinding and polishing equipment is used to ensure that the surface roughness of the workpiece is better than 0.8;
2) Immersing the workpiece in Au plating solution, and plating for 5-10 hours in a water bath environment at 90-95 ℃, wherein the Au plating solution is prepared from 5g/L AuCl 3 NH of 70g/L 4 Cl, 60g/L C6H5Na3O7, 15g/L NiCl 2 And 20g/L NaH2PO 2;
3) Burying a workpiece deposited with an Au coating into Al-containing powder, and diffusing the workpiece in an argon protective atmosphere at 850-1050 ℃ for 2-6 hours to obtain the high-temperature oxidation-resistant coating with high conductivity, wherein the Al-containing powder comprises 1-3% of Al powder and 1-3% of NH by mass percent 4 Cl powder, NH4NO3 powder of 1% -3%, fe-Al alloy powder of 30% -40% and the balance of Al 2 O 3 Powder composition, wherein the granularity of the Al-containing powder is less than 200 meshes.
The high-temperature oxidation resistant coating with high conductivity is suitable for series stainless steel materials with the Cr mass fraction content of 18-25%.
Example 1
The preparation method of the high-temperature oxidation resistant coating with high conductivity provided by the invention takes a 316L stainless steel electrode plate as an object, and comprises the following steps:
1) Oil and rust removal are carried out on the surface of the workpiece, and grinding and polishing equipment is used for enabling the surface roughness of the workpiece to be 0.6;
2) Immersing the workpiece in Au plating solution, plating for 10 hours in a water bath environment at 95 ℃, wherein the Au plating solution consists of 5g/L of AuCl 3 NH of 70g/L 4 Cl, 60g/L C6H5Na3O7, 15g/L NiCl 2 And 20g/L NaH2PO 2;
3) Burying the workpiece deposited with Au coating into Al-containing powder, and diffusing at 860 deg.C for 6 hr in argon atmosphere to obtain high-temperature oxidation resistance with high conductivityA coating layer, wherein the Al-containing powder consists of 1.2% of Al powder and 1.1% of NH by mass percent 4 Cl powder, 3% NH4NO3 powder, 35% Fe-Al alloy powder and the balance Al 2 O 3 Powder composition the particle size of the Al-containing powder was 300 mesh.
Through experiments, the coating is metallurgically bonded with the base metal, the thickness is 38 micrometers, and the coating comprises 16.5% of Al, 2.5% of Au, 2.8% of Ni, 4.0% of Cr and the balance of base metal element Fe in parts by weight. The cross-sectional morphology of the coating is shown in figure 2. The oxidation rate of the coating was 0.012mg/cm in static air at 800 ℃ 2 The specific resistance of the high-temperature surface at 800 ℃ is 38.2mΩ/cm 2 。
Example two
The preparation method of the high-temperature oxidation resistant coating with high conductivity provided by the invention takes a 316L stainless steel electrode plate as an object, and comprises the following steps:
1) Oil and rust removal are carried out on the surface of the workpiece, and grinding and polishing equipment is used for enabling the surface roughness of the workpiece to be 0.6;
2) Immersing the workpiece in Au plating solution, plating for 5 hours in a water bath environment at 90 ℃, wherein the Au plating solution is prepared from 5g/L AuCl 3 NH of 70g/L 4 Cl, 60g/L C6H5Na3O7, 15g/L NiCl 2 And 20g/L NaH2PO 2;
3) Burying a workpiece deposited with an Au coating into Al-containing powder, and diffusing the workpiece for 2 hours at 1050 ℃ in an argon protection atmosphere to obtain the high-temperature oxidation-resistant coating with high conductivity, wherein the Al-containing powder comprises 3% of Al powder and 3% of NH by mass percent 4 Cl powder, 2.5% NH4NO3 powder, 300% Fe-Al alloy powder and the balance Al 2 O 3 Powder composition the particle size of the Al-containing powder was 300 mesh.
Through experiments, the coating is metallurgically bonded with the base metal, the thickness is 86 micrometers, and the coating comprises 24.5% of Al, 1.1% of Au, 1.5% of Ni, 2.5% of Cr and the balance of base metal element Fe in parts by weight. The oxidation rate of the test coating was 0.009mg/cm in static air at 800℃ 2 The specific resistance of the high-temperature surface at 800 ℃ is 37.8mΩ/cm 2 。
Example III
The preparation method of the high-temperature oxidation resistant coating with high conductivity provided by the invention takes a 316L stainless steel electrode plate as an object, and comprises the following steps:
1) Oil and rust removal are carried out on the surface of the workpiece, and grinding and polishing equipment is used for enabling the surface roughness of the workpiece to be 0.6;
2) Immersing the workpiece in Au plating solution, plating for 5 hours in a water bath environment at 95 ℃, wherein the Au plating solution is prepared from 5g/L AuCl 3 NH of 70g/L 4 Cl, 60g/L C6H5Na3O7, 15g/L NiCl 2 And 20g/L NaH2PO 2;
3) Burying a workpiece deposited with an Au coating into Al-containing powder, and diffusing the workpiece in an argon protective atmosphere at 950 ℃ for 4 hours to obtain the high-temperature oxidation-resistant coating with high conductivity, wherein the Al-containing powder comprises 1.8% of Al powder and 2% of NH by mass percent 4 Cl powder, 1% NH4NO3 powder, 40% Fe-Al alloy powder and the balance Al 2 O 3 Powder composition the particle size of the Al-containing powder was 300 mesh.
Through experiments, the coating is metallurgically bonded with the base metal, the thickness is 66 microns, and the coating comprises 22.5% of Al, 1.8% of Au, 2.1% of Ni, 3.2% of Cr and the balance of base metal element Fe in parts by weight. The oxidation rate of the coating was 0.010mg/cm when tested in static air at 800℃ 2 The specific resistance of the high-temperature surface at 800 ℃ is 37.9mΩ/cm 2 。
Example IV
The preparation method of the high-temperature oxidation resistant coating with high conductivity provided by the invention takes a 310 stainless steel electrode plate as an object, and comprises the following steps:
1) Oil and rust removal are carried out on the surface of the workpiece, and grinding and polishing equipment is used for enabling the surface roughness of the workpiece to be 0.6;
2) Immersing the workpiece in Au plating solution, plating for 8 hours in a water bath environment at 95 ℃, wherein the Au plating solution is prepared from 5g/L AuCl 3 NH of 70g/L 4 Cl, 60g/L C6H5Na3O7, 15g/L NiCl 2 And 20g/L NaH2PO 2;
3) Burying the workpiece deposited with Au coating into Al-containing powder, and diffusing at 950 deg.C for 4 hr under argon atmosphere to obtain high conductivityThe high-temperature oxidation resistant coating with electric property comprises 1.2% of Al powder and 1.1% of NH by mass 4 Cl powder, 1% NH4NO3 powder, 35% Fe-Al alloy powder and the balance Al 2 O 3 Powder composition the particle size of the Al-containing powder was 300 mesh.
Through experiments, the coating is metallurgically bonded with the base metal, the thickness is 59 micrometers, and the coating comprises 20.5% of Al, 1.1% of Au, 2.5% of Ni, 4.8% of Cr and the balance of base metal element Fe in parts by mass. The oxidation rate of the test coating was 0.009mg/cm in static air at 800℃ 2 The specific resistance of the high-temperature surface at 800 ℃ is 37.8mΩ/cm 2 。
Example five
The preparation method of the high-temperature oxidation resistant coating with high conductivity comprises the following steps:
1) Oil and rust removal are carried out on the surface of the workpiece, and grinding and polishing equipment is used to enable the surface roughness of the workpiece to be 0.3;
2) Immersing the workpiece in Au plating solution, plating for 5 hours in a water bath environment at 90 ℃, wherein the Au plating solution is prepared from 5g/L AuCl 3 NH of 70g/L 4 Cl, 60g/L C6H5Na3O7, 15g/L NiCl 2 And 20g/L NaH2PO 2;
3) Embedding the workpiece deposited with the Au coating into Al-containing powder, and diffusing for 2 hours at 850 ℃ in an argon protection atmosphere to obtain the high-temperature oxidation-resistant coating with high conductivity, wherein the Al-containing powder comprises 1% of Al powder and 1% of NH by mass percent 4 Cl powder, 1% NH4NO3 powder, 30% Fe-Al alloy powder and the balance Al 2 O 3 Powder composition, the particle size of the Al-containing powder was 400 mesh.
Example six
The preparation method of the high-temperature oxidation resistant coating with high conductivity comprises the following steps:
1) Oil and rust removal are carried out on the surface of the workpiece, and grinding and polishing equipment is used to enable the surface roughness of the workpiece to be 0.7;
2) Immersing the workpiece in Au plating solution, plating for 10 hours in a water bath environment at 95 ℃, wherein the Au plating solution consists of 5g/L of AuCl 3 NH of 70g/L 4 Cl, 60g/L C6H5Na3O7, 15g/L NiCl 2 And 20g/L NaH2PO 2;
3) Burying a workpiece deposited with an Au coating into Al-containing powder, and diffusing the workpiece in an argon protective atmosphere at 1050 ℃ for 6 hours to obtain the high-temperature oxidation-resistant coating with high conductivity, wherein the Al-containing powder comprises 3% of Al powder and 3% of NH by mass percent 4 Cl powder, 3% NH4NO3 powder, 40% Fe-Al alloy powder and the balance Al 2 O 3 Powder composition, the particle size of the Al-containing powder was 500 mesh.
Example seven
The preparation method of the high-temperature oxidation resistant coating with high conductivity comprises the following steps:
1) Oil and rust removal are carried out on the surface of the workpiece, and grinding and polishing equipment is used to enable the surface roughness of the workpiece to be 0.5;
2) Immersing the workpiece in Au plating solution, plating for 6 hours in a water bath environment at 92 ℃, wherein the Au plating solution is prepared from 5g/L AuCl 3 NH of 70g/L 4 Cl, 60g/L C6H5Na3O7, 15g/L NiCl 2 And 20g/L NaH2PO 2;
3) Burying a workpiece deposited with an Au coating into Al-containing powder, and diffusing the workpiece in an argon protective atmosphere at 1000 ℃ for 4 hours to obtain the high-temperature oxidation-resistant coating with high conductivity, wherein the Al-containing powder comprises 2% of Al powder and 2% of NH by mass percent 4 Cl powder, 2% NH4NO3 powder, 32% Fe-Al alloy powder and the balance Al 2 O 3 Powder composition, wherein the granularity of the Al-containing powder is less than 200 meshes.
Example eight
The preparation method of the high-temperature oxidation resistant coating with high conductivity comprises the following steps:
1) Oil and rust removal are carried out on the surface of the workpiece, and grinding and polishing equipment is used to enable the surface roughness of the workpiece to be 0.6;
2) Immersing the workpiece in Au plating solution, plating for 8 hours in a water bath environment at 94 ℃, wherein the Au plating solution consists of 5g/L of AuCl 3 NH of 70g/L 4 Cl, 60g/L C6H5Na3O7, 15g/L NiCl 2 And 20g/L NaH2PO 2;
3) Burying a workpiece deposited with an Au coating into Al-containing powder, and diffusing the workpiece in an argon protective atmosphere at 950 ℃ for 5 hours to obtain the high-temperature oxidation-resistant coating with high conductivity, wherein the Al-containing powder comprises 2.5% of Al powder and 2.5% of NH by mass percent 4 Cl powder, 2.5% NH4NO3 powder, 38% Fe-Al alloy powder and the balance Al 2 O 3 Powder composition the particle size of the Al-containing powder was 300 mesh.
Finally, it should be noted that: the above embodiments are only for illustrating the technical aspects of the present invention and not for limiting the same, and although the present invention has been described in detail with reference to the above embodiments, it should be understood by those of ordinary skill in the art that: modifications and equivalents may be made to the specific embodiments of the invention without departing from the spirit and scope of the invention, which is intended to be covered by the claims.
Claims (8)
1. The high-temperature oxidation resistant coating with high conductivity is characterized by comprising 15-25% of Al, 1-3% of Ni, 1-5% of Cr, 1-3% of Au and the balance of Fe element by mass percent.
2. A method for preparing the high-temperature oxidation resistant coating with high conductivity according to claim 1, comprising the following steps:
1) Pretreating the surface of a workpiece;
2) Immersing a workpiece in an Au plating solution for plating, and depositing an Au coating on the surface of the workpiece;
3) And (3) embedding the workpiece deposited with the Au coating into Al-containing powder, and diffusing in an argon protective atmosphere to obtain the high-temperature oxidation resistant coating with high conductivity.
3. The method for preparing the high-temperature oxidation resistant coating with high conductivity according to claim 2, wherein the specific operation of the step 1) is as follows: and (3) degreasing and derusting the surface of the workpiece, and grinding and polishing the surface of the workpiece.
4. The method for preparing the high-temperature oxidation resistant coating with high conductivity according to claim 2, wherein in the step 2), the specific plating process is as follows: plating in water bath at 90-95 deg.c for 5-10 hr.
5. The method for preparing a high-temperature oxidation resistant coating with high conductivity according to claim 2, wherein in step 2), the Au plating solution consists of 5g/L of AuCl 3 NH of 70g/L 4 Cl, 60g/L C6H5Na3O7, 15g/L NiCl 2 And 20g/L NaH2PO 2.
6. The method for preparing the high-temperature oxidation resistant coating with high conductivity according to claim 2, wherein the specific process of diffusion in the step 3) is as follows: and the diffusion is carried out for 2 to 6 hours at the temperature of 850 to 1050 ℃.
7. The method for preparing the high-temperature oxidation resistant coating with high conductivity according to claim 2, wherein the Al-containing powder comprises 1-3% of Al powder and 1-3% of NH by mass percent 4 Cl powder, NH4NO3 powder of 1% -3%, fe-Al alloy powder of 30% -40% and the balance of Al 2 O 3 Powder composition.
8. The method for producing a high-temperature oxidation resistant coating according to claim 2, wherein in step 3), the particle size of the Al-containing powder is less than 200 mesh.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310028647.4A CN116005079A (en) | 2023-01-09 | 2023-01-09 | High-temperature oxidation resistant coating with high conductivity and preparation method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310028647.4A CN116005079A (en) | 2023-01-09 | 2023-01-09 | High-temperature oxidation resistant coating with high conductivity and preparation method thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN116005079A true CN116005079A (en) | 2023-04-25 |
Family
ID=86024591
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202310028647.4A Pending CN116005079A (en) | 2023-01-09 | 2023-01-09 | High-temperature oxidation resistant coating with high conductivity and preparation method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN116005079A (en) |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101629028A (en) * | 2009-08-27 | 2010-01-20 | 北京科技大学 | Multifunctional alumina/metal micro-laminated coating |
| US20140321997A1 (en) * | 2013-04-26 | 2014-10-30 | Howmet Corporation | Internal airfoil component electroplating |
| CN108588771A (en) * | 2018-04-03 | 2018-09-28 | 浙江工业大学 | A kind of composite ceramic coat and its preparation process of the middle layer containing noble metal |
-
2023
- 2023-01-09 CN CN202310028647.4A patent/CN116005079A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101629028A (en) * | 2009-08-27 | 2010-01-20 | 北京科技大学 | Multifunctional alumina/metal micro-laminated coating |
| US20140321997A1 (en) * | 2013-04-26 | 2014-10-30 | Howmet Corporation | Internal airfoil component electroplating |
| CN108588771A (en) * | 2018-04-03 | 2018-09-28 | 浙江工业大学 | A kind of composite ceramic coat and its preparation process of the middle layer containing noble metal |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CA1044643A (en) | Ductile corrosion resistant coating on a superalloy substrate | |
| CN102009504B (en) | Steel strip plated with multi-layer micron/nano-crystal nickel films and preparation method thereof | |
| CN108130566B (en) | Electroplate liquid and its electro-plating method for nickel base superalloy electroplating surface platinum layer | |
| Tsai et al. | The fabrication and characteristics of electroless nickel and immersion Au-polytetrafluoroethylene composite coating on aluminum alloy 5052 as bipolar plate | |
| Fetohi et al. | Study of different aluminum alloy substrates coated with Ni–Co–P as metallic bipolar plates for PEM fuel cell applications | |
| CN114086016B (en) | Aluminum-based diamond composite material with high finish and preparation method thereof | |
| JP5572146B2 (en) | Protective film forming method, cell connecting member, and solid oxide fuel cell | |
| CN108588771B (en) | Composite ceramic coating containing noble metal intermediate layer and preparation process thereof | |
| CN105332029B (en) | A kind of preparation method of conductive anti-corrosion cobalt-manganese spinel coating | |
| JP5731683B2 (en) | Cell connecting member, cell for solid oxide fuel cell, and electrodeposition coating used for production thereof | |
| CN113067005A (en) | Preparation method of metal support plate for fuel cell | |
| CN108998794A (en) | A kind of Re-Si is total to modified aluminide coating and preparation method thereof | |
| EP1032725B1 (en) | Enhancement of coating uniformity by alumina doping | |
| CN113789556B (en) | Method for preparing composite bonding layer by combining electroplating and chemical vapor deposition and composite bonding layer | |
| CN116005079A (en) | High-temperature oxidation resistant coating with high conductivity and preparation method thereof | |
| EP1204532B1 (en) | One-step noble metal-aluminide coatings | |
| KR20110094184A (en) | Method for carrying out diffusion treatment on coating of engineering parts resistant to marine climate | |
| CN110306216B (en) | Active element Re modified beta- (Ni, Pt) -Al coating and preparation process thereof | |
| CN113328111B (en) | Stainless steel bipolar plate with chromium-based nitride composite coating and preparation method thereof | |
| CN112609210B (en) | CeO (CeO)2Cu/Mn-doped composite film/microcrystalline interface layer and metal-based composite connector and preparation method thereof | |
| CN114657544B (en) | Cobalt aluminizing process and cobalt aluminizing layer for inner cavity surface of nickel-based superalloy | |
| CN113789557B (en) | Preparation method of high-temperature alloy surface compact type Re-rich diffusion-resistant coating | |
| CN109457278A (en) | A kind of substep prepares titanium alloy surface TiSi2The method of+(Ni, Ti) Si composite coating | |
| CN109020591B (en) | A kind of preparation method and tesla's turbine disk of tesla's turbine disk | |
| CN114318202A (en) | Nickel-based alloy surface wear-resistant coating and preparation method thereof |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |