CN116120826B - Preparation method of normal-temperature self-drying high-temperature anti-corrosion nano ceramic coating - Google Patents
Preparation method of normal-temperature self-drying high-temperature anti-corrosion nano ceramic coating Download PDFInfo
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- 238000001035 drying Methods 0.000 title claims abstract description 73
- 238000005524 ceramic coating Methods 0.000 title claims abstract description 56
- 238000005260 corrosion Methods 0.000 title claims abstract description 31
- 238000002360 preparation method Methods 0.000 title claims abstract description 17
- 238000000498 ball milling Methods 0.000 claims abstract description 228
- 239000000919 ceramic Substances 0.000 claims abstract description 165
- 239000000843 powder Substances 0.000 claims abstract description 104
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims abstract description 94
- 238000011282 treatment Methods 0.000 claims abstract description 69
- 238000002156 mixing Methods 0.000 claims abstract description 67
- 239000002002 slurry Substances 0.000 claims abstract description 63
- 238000003756 stirring Methods 0.000 claims abstract description 61
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 claims abstract description 39
- 239000000835 fiber Substances 0.000 claims abstract description 39
- 238000000034 method Methods 0.000 claims abstract description 35
- 230000008569 process Effects 0.000 claims abstract description 24
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 62
- MRELNEQAGSRDBK-UHFFFAOYSA-N lanthanum(3+);oxygen(2-) Chemical compound [O-2].[O-2].[O-2].[La+3].[La+3] MRELNEQAGSRDBK-UHFFFAOYSA-N 0.000 claims description 52
- MCMNRKCIXSYSNV-UHFFFAOYSA-N Zirconium dioxide Chemical compound O=[Zr]=O MCMNRKCIXSYSNV-UHFFFAOYSA-N 0.000 claims description 50
- 239000000203 mixture Substances 0.000 claims description 50
- 239000011812 mixed powder Substances 0.000 claims description 40
- 239000002904 solvent Substances 0.000 claims description 34
- HBMJWWWQQXIZIP-UHFFFAOYSA-N silicon carbide Chemical compound [Si+]#[C-] HBMJWWWQQXIZIP-UHFFFAOYSA-N 0.000 claims description 32
- 229910010271 silicon carbide Inorganic materials 0.000 claims description 32
- 239000010433 feldspar Substances 0.000 claims description 31
- 239000000377 silicon dioxide Substances 0.000 claims description 31
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 claims description 30
- 125000004108 n-butyl group Chemical group [H]C([H])([H])C([H])([H])C([H])([H])C([H])([H])* 0.000 claims description 30
- 229920001225 polyester resin Polymers 0.000 claims description 30
- 239000004645 polyester resin Substances 0.000 claims description 30
- 229920005749 polyurethane resin Polymers 0.000 claims description 30
- 229920005989 resin Polymers 0.000 claims description 30
- 239000011347 resin Substances 0.000 claims description 30
- 229920006395 saturated elastomer Polymers 0.000 claims description 30
- 239000010703 silicon Substances 0.000 claims description 30
- 229910052710 silicon Inorganic materials 0.000 claims description 30
- 239000002994 raw material Substances 0.000 claims description 29
- 239000001856 Ethyl cellulose Substances 0.000 claims description 28
- ZZSNKZQZMQGXPY-UHFFFAOYSA-N Ethyl cellulose Chemical compound CCOCC1OC(OC)C(OCC)C(OCC)C1OC1C(O)C(O)C(OC)C(CO)O1 ZZSNKZQZMQGXPY-UHFFFAOYSA-N 0.000 claims description 28
- 238000005255 carburizing Methods 0.000 claims description 28
- 229920001249 ethyl cellulose Polymers 0.000 claims description 28
- 235000019325 ethyl cellulose Nutrition 0.000 claims description 28
- 229910000420 cerium oxide Inorganic materials 0.000 claims description 26
- BMMGVYCKOGBVEV-UHFFFAOYSA-N oxo(oxoceriooxy)cerium Chemical compound [Ce]=O.O=[Ce]=O BMMGVYCKOGBVEV-UHFFFAOYSA-N 0.000 claims description 26
- SIWVEOZUMHYXCS-UHFFFAOYSA-N oxo(oxoyttriooxy)yttrium Chemical compound O=[Y]O[Y]=O SIWVEOZUMHYXCS-UHFFFAOYSA-N 0.000 claims description 26
- 235000012239 silicon dioxide Nutrition 0.000 claims description 17
- 229910052582 BN Inorganic materials 0.000 claims description 15
- PZNSFCLAULLKQX-UHFFFAOYSA-N Boron nitride Chemical compound N#B PZNSFCLAULLKQX-UHFFFAOYSA-N 0.000 claims description 15
- 238000001132 ultrasonic dispersion Methods 0.000 claims description 14
- QCWXUUIWCKQGHC-UHFFFAOYSA-N Zirconium Chemical group [Zr] QCWXUUIWCKQGHC-UHFFFAOYSA-N 0.000 claims description 13
- 229910052726 zirconium Inorganic materials 0.000 claims description 13
- 239000012298 atmosphere Substances 0.000 claims description 12
- RVTZCBVAJQQJTK-UHFFFAOYSA-N oxygen(2-);zirconium(4+) Chemical compound [O-2].[O-2].[Zr+4] RVTZCBVAJQQJTK-UHFFFAOYSA-N 0.000 claims description 6
- 229910001928 zirconium oxide Inorganic materials 0.000 claims description 6
- 230000000694 effects Effects 0.000 abstract description 9
- 229910052761 rare earth metal Inorganic materials 0.000 abstract description 7
- 238000009413 insulation Methods 0.000 abstract description 5
- 230000035939 shock Effects 0.000 abstract description 5
- 238000005245 sintering Methods 0.000 abstract description 5
- 239000003973 paint Substances 0.000 description 21
- 238000005516 engineering process Methods 0.000 description 12
- 238000000576 coating method Methods 0.000 description 11
- 239000011248 coating agent Substances 0.000 description 10
- 230000000052 comparative effect Effects 0.000 description 8
- 230000007797 corrosion Effects 0.000 description 8
- 239000000463 material Substances 0.000 description 5
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 5
- 239000011159 matrix material Substances 0.000 description 4
- 239000000758 substrate Substances 0.000 description 4
- 239000003795 chemical substances by application Substances 0.000 description 3
- 238000011109 contamination Methods 0.000 description 3
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- 238000010438 heat treatment Methods 0.000 description 3
- 230000006872 improvement Effects 0.000 description 3
- 150000002910 rare earth metals Chemical class 0.000 description 3
- RMAQACBXLXPBSY-UHFFFAOYSA-N silicic acid Chemical compound O[Si](O)(O)O RMAQACBXLXPBSY-UHFFFAOYSA-N 0.000 description 3
- 239000002893 slag Substances 0.000 description 3
- 229910000831 Steel Inorganic materials 0.000 description 2
- 238000010521 absorption reaction Methods 0.000 description 2
- 239000012752 auxiliary agent Substances 0.000 description 2
- 229910010293 ceramic material Inorganic materials 0.000 description 2
- 230000008859 change Effects 0.000 description 2
- 239000002131 composite material Substances 0.000 description 2
- 238000010276 construction Methods 0.000 description 2
- KPUWHANPEXNPJT-UHFFFAOYSA-N disiloxane Chemical class [SiH3]O[SiH3] KPUWHANPEXNPJT-UHFFFAOYSA-N 0.000 description 2
- 239000000945 filler Substances 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 230000003647 oxidation Effects 0.000 description 2
- 238000007254 oxidation reaction Methods 0.000 description 2
- 239000002245 particle Substances 0.000 description 2
- 239000000049 pigment Substances 0.000 description 2
- 238000005507 spraying Methods 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 230000008646 thermal stress Effects 0.000 description 2
- 238000005303 weighing Methods 0.000 description 2
- ZOXJGFHDIHLPTG-BJUDXGSMSA-N Boron-10 Chemical group [10B] ZOXJGFHDIHLPTG-BJUDXGSMSA-N 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
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- 238000005054 agglomeration Methods 0.000 description 1
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- 230000009286 beneficial effect Effects 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 238000005336 cracking Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000007123 defense Effects 0.000 description 1
- 230000001934 delay Effects 0.000 description 1
- -1 dicyclopentadienyl oxyethyl acrylate Chemical compound 0.000 description 1
- RGPUVZXXZFNFBF-UHFFFAOYSA-K diphosphonooxyalumanyl dihydrogen phosphate Chemical compound [Al+3].OP(O)([O-])=O.OP(O)([O-])=O.OP(O)([O-])=O RGPUVZXXZFNFBF-UHFFFAOYSA-K 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 238000000227 grinding Methods 0.000 description 1
- 230000036541 health Effects 0.000 description 1
- 238000005984 hydrogenation reaction Methods 0.000 description 1
- 238000010907 mechanical stirring Methods 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 229910052755 nonmetal Inorganic materials 0.000 description 1
- 238000005120 petroleum cracking Methods 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 230000002787 reinforcement Effects 0.000 description 1
- 238000005204 segregation Methods 0.000 description 1
- 239000000779 smoke Substances 0.000 description 1
- 239000012258 stirred mixture Substances 0.000 description 1
- 239000002341 toxic gas Substances 0.000 description 1
Classifications
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D175/00—Coating compositions based on polyureas or polyurethanes; Coating compositions based on derivatives of such polymers
- C09D175/04—Polyurethanes
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D5/00—Coating compositions, e.g. paints, varnishes or lacquers, characterised by their physical nature or the effects produced; Filling pastes
- C09D5/08—Anti-corrosive paints
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D7/00—Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
- C09D7/40—Additives
- C09D7/60—Additives non-macromolecular
- C09D7/61—Additives non-macromolecular inorganic
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D7/00—Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
- C09D7/40—Additives
- C09D7/70—Additives characterised by shape, e.g. fibres, flakes or microspheres
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D7/00—Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
- C09D7/80—Processes for incorporating ingredients
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/18—Oxygen-containing compounds, e.g. metal carbonyls
- C08K3/20—Oxides; Hydroxides
- C08K3/22—Oxides; Hydroxides of metals
- C08K2003/221—Oxides; Hydroxides of metals of rare earth metal
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/18—Oxygen-containing compounds, e.g. metal carbonyls
- C08K3/20—Oxides; Hydroxides
- C08K3/22—Oxides; Hydroxides of metals
- C08K2003/221—Oxides; Hydroxides of metals of rare earth metal
- C08K2003/2213—Oxides; Hydroxides of metals of rare earth metal of cerium
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/18—Oxygen-containing compounds, e.g. metal carbonyls
- C08K3/20—Oxides; Hydroxides
- C08K3/22—Oxides; Hydroxides of metals
- C08K2003/2244—Oxides; Hydroxides of metals of zirconium
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/38—Boron-containing compounds
- C08K2003/382—Boron-containing compounds and nitrogen
- C08K2003/385—Binary compounds of nitrogen with boron
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K2201/00—Specific properties of additives
- C08K2201/002—Physical properties
- C08K2201/005—Additives being defined by their particle size in general
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- Chemical & Material Sciences (AREA)
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- Engineering & Computer Science (AREA)
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- Wood Science & Technology (AREA)
- Organic Chemistry (AREA)
- Inorganic Chemistry (AREA)
- Compositions Of Oxide Ceramics (AREA)
- Paints Or Removers (AREA)
Abstract
The invention discloses a preparation method of a normal-temperature self-drying high-temperature anti-corrosion nano ceramic coating. Firstly, uniformly dispersing alumina fiber and carbon powder in slurry through ball milling, then, carrying out carburization treatment on ceramic powder, adding part of rare earth elements, and finally, mixing the slurry with the ceramic powder containing the rare earth elements through a stirring paddle to obtain the anti-corrosion nano ceramic coating. Compared with the traditional process, the preparation method of the normal-temperature self-drying high-temperature anti-corrosion nano ceramic coating improves the heat insulation effect of the ceramic coating, has outstanding thermal shock resistance and sintering strength, and is suitable for industrial popularization.
Description
Technical Field
The invention relates to the technical field of nano ceramic coating, in particular to a preparation method of a normal-temperature self-drying high-temperature anti-corrosion nano ceramic coating.
Background
Along with the rapid development of modern industry and national defense construction (such as aerospace, aviation, weapons and the like) industry, the requirements on high-temperature resistant coatings of equipment are higher and higher, and paint films are required to be free from color change and falling at high temperature, and good physical and mechanical properties and corrosion resistance can be still maintained. In the field of utility boilers, the problems of contamination and slagging are particularly pronounced in recent years due to the variability of the fuel used in utility boilers. The problems of insufficient heat absorption of the water cooling wall, high smoke temperature at the outlet of the hearth, slag hanging on a convection heating surface, overtemperature of the pipe wall, excessive input of the temperature reducing water and the like are frequently encountered in the operation, so that the safe and stable operation of the power station boiler and the economical efficiency of a unit are greatly influenced.
The high temperature resistant paint is also called heat resistant paint, and is special functional paint capable of maintaining proper physical and mechanical performance at 200 deg.c and below and with paint film with no color change and no falling off and making the protected object function normally in high temperature environment. Therefore, the high-temperature resistant coating is widely applied to high-temperature places such as steel chimneys, high-temperature pipelines, high-temperature furnace shells, petroleum cracking devices, tanks, artillery and the like, delays the hot hydrogenation corrosion of metal equipment such as steel and the like at high temperature, and ensures that the equipment can be used for a long time. At present, a plurality of reports are made on the heat-resistant paint, and the heat resistance of the existing heat-resistant paint basically meets the use requirement, but has some defects. If the surface drying time of the paint film is long, the appearance of the paint film is affected due to dust and the like in the use process; poor corrosion resistance at high temperatures, and the like.
The high-temperature nano ceramic material coating has a plurality of excellent technological properties of high-temperature corrosion resistance, wear resistance, contamination resistance, slag bonding resistance and the like. The high-temperature nano ceramic coating is formed by spraying composite rare earth nano ceramic slurry on the surface of a metal or non-metal substrate, drying, solidifying and heating the composite rare earth nano ceramic slurry, has excellent high-temperature stability, corrosion resistance, hardness and non-wettability surface mechanical properties, is purple and dense with the substrate in a chemical bond form, and can comprehensively improve the surface physical and chemical properties of the substrate.
The high-temperature nano ceramic material coating has the following action mechanism:
1. the compact ceramic film isolates the contact between the matrix and the external environment, exerts the performances of oxidation resistance, high-temperature corrosion resistance, wear resistance and the like of the nano ceramic coating, is attached to the surface of the substrate, comprehensively improves the performance and the accessibility of the matrix material, and effectively prevents the oxidation, the high-temperature corrosion and the wear of the matrix material.
2. The nano ceramic coating is processed by a nano process according to a special formula, has small specific surface energy, so that molten ash particles are difficult to adhere to a heating surface, and has good contamination and slag bonding resistance.
3. The nano ceramic coating has high emissivity and high heat conductivity, can improve the blackness of the water-cooled wall after spraying, enhances the heat absorption capacity of the water-cooled wall, reduces the overall temperature of the hearth, and can operate at a relatively low temperature level by the matrix material.
The problems of high price, poor mechanical property, complicated construction process, high curing condition requirement and the like limit the application field of the ceramic coating at present, and the inorganic ceramic coating has health and environmental protection, particularly good incombustibility, no toxic gas release at high temperature and the like. Attention has been paid more and more in recent years.
Through the prior art and document retrieval, the following steps are found: patent document (CN 106977983B) discloses a normal temperature curable nanoceramic coating comprising an a-component consisting of silica sol, pigment, filler and water, and a B-component consisting of siloxane, auxiliary agent, drier and solvent. In addition, the invention also discloses a preparation method of the normal-temperature-curable nano ceramic coating, which comprises the following steps: step 1, weighing corresponding components of silica sol, pigment, filler and water, mixing, stirring the obtained mixture, grinding the uniformly stirred mixture until the fineness of the mixture is below 25 mu m, and taking the mixture as a component A; weighing corresponding components of siloxane, auxiliary agent, drier and solvent, mixing, uniformly stirring the obtained mixture, and taking the mixture as a component B; and 3, fully mixing the component A and the component B according to the proportion to generate the nano ceramic coating.
Patent document (CN 105860609A) discloses a high temperature resistant anticorrosive ceramic coating, which comprises the following raw materials in parts by weight: 10-15 parts of silica sol, 15-20 parts of aluminum dihydrogen phosphate, 5-10 parts of glass powder, 25-35 parts of ceramic micro powder, 1-5 parts of dicyclopentadienyl oxyethyl acrylate and 20-30 parts of water.
The above method optimizes the properties of the ceramic slurry by adjusting the composition of the ceramic slurry. The ceramic slurry prepared by the simple material stacking method has limited thermal shock resistance, heat insulation effect and high temperature resistance. The method aims at heat insulation and corrosion resistance of ceramic slurry. High temperature resistance. The ceramic slurry with thermal shock resistance is obtained through double improvements of the process and the components, and is suitable for large-scale industrial popularization.
Disclosure of Invention
The invention aims to provide a preparation method of a normal-temperature self-drying high-temperature anti-corrosion nano ceramic coating, which has obvious gain effect on improving the performance of the high-temperature anti-corrosion nano ceramic coating under the improvement of related processes and raw materials.
The method is based on the principle that: 1. the purpose of mixing alumina fibers in the self-drying slurry is to use the alumina fibers as a reinforcement, so that the strength of the slurry after drying is ensured; 2. the carbon powder is added to be used as a pore-forming agent in the later high-temperature sintering process, and micron-sized vacuum or semi-vacuum micropores are prepared in the ceramic coating, so that the heat insulation effect is achieved; 3. the preferential mixing of the alumina fibers into the self-drying slurry is due to the inability to sufficiently disperse the alumina fibers with simple stirring, and the energy of ball milling is much greater than that of mechanical stirring; 4. mixing carbon powder and silicon carbide together, ball milling and then mixing with self-drying slurry, wherein the silicon carbide is coated with the carbon powder, and the carbon powder is uniformly dispersed into the slurry by the silicon carbide; 5. the ceramic powder is carburized, so that the strength of the ceramic powder can be obviously increased; 6. the rare earth elements are added to modify the ceramic, so that various properties of the final ceramic coating, including strength, thermal shock and the like, are improved.
The method is characterized in that 1. The alumina ceramic fiber can be fully dispersed in slurry without agglomeration and segregation, so that the cracking of a coating caused by the difference of thermal stress in the later sintering is avoided; 2. as with alumina fiber, carbon powder is required to be uniformly distributed in slurry, and uneven distribution of pore-forming agent can lead to uneven distribution of pores in the later-stage coating, and also can cause difference of thermal stress to influence the service life of the coating; 3. after carburization treatment of the ceramic powder, the ceramic powder can be pseudo-agglomerated, which is required to be crushed in the subsequent ball milling process, so that the non-uniformity of the particle size of the powder is avoided.
The invention relates to a preparation method of a normal-temperature self-drying high-temperature anti-corrosion nano ceramic coating, which comprises the following specific implementation steps:
step S1, preparing raw materials according to mass proportion;
the raw materials are prepared according to the mass ratio: 20-45 parts of aqueous polyurethane resin, 15-35 parts of aqueous saturated polyester resin, 10-30 parts of aqueous organic silicon resin, 2-7 parts of n-butyl titanate, 2-7 parts of ethyl cellulose, 1-5 parts of alumina fiber, 25-35 parts of zirconia, 20-40 parts of silica, 15-25 parts of feldspar, 5-15 parts of boron nitride, 5-15 parts of silicon carbide, 0.4-0.8 part of cerium oxide, 0.1-0.3 part of yttrium oxide, 0.1-0.3 part of lanthanum oxide and 2-4 parts of carbon powder;
s2, preparing self-drying slurry through a ball milling process;
mixing and ball milling aqueous polyurethane resin, aqueous saturated polyester resin, aqueous organic silicon resin, n-butyl titanate and ethyl cellulose according to a configuration proportion to obtain a solvent, wherein the ball milling time is 6-10h, the ball milling medium is zirconium balls, and the ball milling rotating speed is 200-400rpm;
mixing and ball milling alumina fiber, silicon carbide and 1-2 parts of carbon powder to obtain mixed ceramic powder, wherein the ball milling time is 2-3h, and the ball milling rotating speed is 100-200rpm to obtain mixed powder I containing carbon powder;
carrying out three ball milling treatments on the mixed powder containing carbon powder and a solvent, wherein the ball milling time is 1-2h, and the ball milling rotating speed is 100-200rpm to obtain self-drying slurry;
step S3, obtaining ceramic oxide containing a carburized layer through carburization treatment;
mixing and ball milling zirconium oxide, silicon dioxide, feldspar and 1-2 parts of carbon powder to obtain mixed ceramic powder, wherein the ball milling time is 3-5h, and the ball milling rotating speed is 200-400rpm to obtain mixed powder II containing carbon powder;
carburizing the mixed ceramic powder, wherein the carburizing temperature is 1000-1400 ℃, the treatment time is 2-4h, the treatment atmosphere is vacuum, and the vacuum degree is 0.1-0.5pa, and finally obtaining ceramic oxide containing a carburized layer;
s4, obtaining a mixture of ceramic powder through ball milling treatment;
mixing and ball milling ceramic oxide containing carburized layer, cerium oxide, yttrium oxide and lanthanum oxide for 1-3h at 200-400rpm to obtain ceramic powder mixture;
s5, obtaining ceramic paint through stirring and ultrasonic technology;
stirring the mixture of the ceramic powder and the self-drying slurry, and performing ultrasonic dispersion, wherein the stirring speed is 100-200rpm, and the stirring time is 30-60min to obtain the ceramic coating.
The beneficial effects are that:
(1) The invention designs a preparation method of a normal-temperature self-drying high-temperature anti-corrosion nano ceramic coating, which utilizes alumina fibers to form 'connection' in a material, ensures the strength of the material before and after sintering, and improves the thermal shock resistance of the material;
(2) The invention designs a preparation method of a normal-temperature self-drying high-temperature anti-corrosion nano ceramic coating, which uses carbon powder as a pore-forming agent to form vacuum or semi-vacuum micron-sized holes in a ceramic coating, and has obvious improvement effect on the heat insulation effect of the coating;
(3) The invention designs a preparation method of a normal-temperature self-drying high-temperature anti-corrosion nano ceramic coating, which is characterized in that the obtained ceramic powder has good surface strength and anti-corrosion capability by carburizing the ceramic powder; (4) The invention designs a preparation method of a normal-temperature self-drying high-temperature anti-corrosion nano ceramic coating, which is characterized in that rare earth elements are added into slurry to modify ceramic powder, so that the sintering activity and the surface hardness of ceramic are improved well.
Drawings
FIG. 1 is a preparation flow chart of a preparation method of a normal temperature self-drying high temperature anti-corrosive nano ceramic coating.
Detailed Description
The present invention will be described in further detail with reference to the drawings and examples, in order to make the objects, technical solutions and advantages of the present invention more apparent. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the invention.
The embodiment of the invention provides a preparation method of a normal-temperature self-drying high-temperature anti-corrosion nano ceramic coating, which mainly comprises the following steps:
step S1, preparing raw materials according to mass proportion;
specifically, the raw materials are prepared according to the mass ratio: 20-45 parts of aqueous polyurethane resin, 15-35 parts of aqueous saturated polyester resin, 10-30 parts of aqueous organic silicon resin, 2-7 parts of n-butyl titanate, 2-7 parts of ethyl cellulose, 1-5 parts of alumina fiber, 25-35 parts of zirconia, 20-40 parts of silica, 15-25 parts of feldspar, 5-15 parts of boron nitride, 5-15 parts of silicon carbide, 0.4-0.8 part of cerium oxide, 0.1-0.3 part of yttrium oxide, 0.1-0.3 part of lanthanum oxide and 2-4 parts of carbon powder;
s2, preparing self-drying slurry through a ball milling process;
mixing and ball milling aqueous polyurethane resin, aqueous saturated polyester resin, aqueous organic silicon resin, n-butyl titanate and ethyl cellulose according to a configuration proportion to obtain a solvent;
mixing and ball milling alumina fiber, silicon carbide and 1-2 parts of carbon powder to obtain mixed ceramic powder;
carrying out ball milling on the mixed powder containing carbon powder and a solvent for three times to obtain self-drying slurry;
step S3, obtaining ceramic oxide containing a carburized layer through carburization treatment;
mixing and ball milling zirconium oxide, silicon dioxide, feldspar and 1-2 parts of carbon powder to obtain mixed ceramic powder;
carburizing the mixed ceramic powder to obtain ceramic oxide containing a carburized layer;
s4, obtaining a mixture of ceramic powder through ball milling treatment;
mixing and ball milling ceramic oxide containing carburized layer with cerium oxide, yttrium oxide and lanthanum oxide to obtain a mixture of ceramic powder;
and S5, obtaining the ceramic coating through stirring and ultrasonic processes.
Stirring the mixture of the ceramic powder and the self-drying slurry, and performing ultrasonic dispersion to obtain a ceramic coating;
as an example, the following description of the preparation method of the normal-temperature self-drying high-temperature anti-corrosion nano ceramic coating is given by the following examples of example 1, example 2, example 3 and examples 1-8.
Example 1:
step S1, preparing raw materials according to mass proportion;
the raw materials are prepared according to the mass ratio: 20 parts of aqueous polyurethane resin, 15 parts of aqueous saturated polyester resin, 10 parts of aqueous organic silicon resin, 2 parts of n-butyl titanate, 2 parts of ethyl cellulose, 1 part of alumina fiber, 25 parts of zirconia, 20 parts of silicon dioxide, 155 parts of feldspar, 5 parts of boron nitride, 5 parts of silicon carbide, 0.4 part of cerium oxide, 0.1 part of yttrium oxide, 0.1 part of lanthanum oxide and 2 parts of carbon powder;
s2, preparing self-drying slurry through a ball milling process;
mixing and ball milling aqueous polyurethane resin, aqueous saturated polyester resin, aqueous organic silicon resin, n-butyl titanate and ethyl cellulose according to a configuration proportion to obtain a solvent, wherein the ball milling time is 6 hours, the ball milling medium is zirconium balls, and the ball milling rotating speed is 200rpm;
mixing and ball-milling alumina fiber, silicon carbide and 1 part of carbon powder to obtain mixed ceramic powder, wherein the ball-milling time is 2h, and the ball-milling rotating speed is 100rpm to obtain mixed powder I containing the carbon powder;
carrying out three ball milling treatments on the mixed powder containing carbon powder and a solvent, wherein the ball milling time is 1-2h, and the ball milling rotating speed is 100rpm to obtain self-drying slurry;
step S3, obtaining ceramic oxide containing a carburized layer through carburization treatment;
mixing zirconia, silica, feldspar and 1 part of carbon powder, ball milling to obtain mixed ceramic powder, wherein the ball milling time is 3h, and the ball milling rotating speed is 200rpm to obtain mixed powder II containing carbon powder;
carburizing the mixed ceramic powder, wherein the carburizing temperature is 1000 ℃, the treatment time is 2 hours, the treatment atmosphere is vacuum, and the vacuum degree is 0.1pa, and finally obtaining ceramic oxide containing a carburized layer;
s4, obtaining a mixture of ceramic powder through ball milling treatment;
mixing and ball milling ceramic oxide containing carburized layer, cerium oxide, yttrium oxide and lanthanum oxide for 1h at 200rpm to obtain a mixture of ceramic powder;
s5, obtaining ceramic paint through stirring and ultrasonic technology;
and stirring the mixture of the ceramic powder and the self-drying slurry, and performing ultrasonic dispersion, wherein the stirring speed is 100rpm, and the stirring time is 30min, so as to obtain the ceramic coating.
Example 2:
step S1, preparing raw materials according to mass proportion;
the raw materials are prepared according to the mass ratio: 45 parts of aqueous polyurethane resin, 35 parts of aqueous saturated polyester resin, 30 parts of aqueous organic silicon resin, 7 parts of n-butyl titanate, 7 parts of ethyl cellulose, 5 parts of alumina fiber, 35 parts of zirconia, 40 parts of silicon dioxide, 25 parts of feldspar, 15 parts of boron nitride, 15 parts of silicon carbide, 0.8 part of cerium oxide, 0.3 part of yttrium oxide, 0.3 part of lanthanum oxide and 4 parts of carbon powder;
s2, preparing self-drying slurry through a ball milling process;
mixing and ball milling aqueous polyurethane resin, aqueous saturated polyester resin, aqueous organic silicon resin, n-butyl titanate and ethyl cellulose according to a configuration proportion to obtain a solvent, wherein the ball milling time is 10 hours, the ball milling medium is zirconium balls, and the ball milling rotating speed is 400rpm;
mixing and ball-milling alumina fiber, silicon carbide and 2 parts of carbon powder to obtain mixed ceramic powder, wherein the ball-milling time is 3h, and the ball-milling rotating speed is 200rpm to obtain mixed powder I containing the carbon powder;
carrying out three ball milling treatments on the mixed powder containing carbon powder and a solvent, wherein the ball milling time is 2 hours, and the ball milling rotating speed is 200rpm to obtain self-drying slurry;
step S3, obtaining ceramic oxide containing a carburized layer through carburization treatment;
mixing and ball-milling zirconium oxide, silicon dioxide, feldspar and 2 parts of carbon powder to obtain mixed ceramic powder, wherein the ball-milling time is 5 hours, and the ball-milling rotating speed is 400rpm to obtain mixed powder II containing the carbon powder;
carburizing the mixed ceramic powder, wherein the carburizing temperature is 1400 ℃, the treatment time is 4 hours, the treatment atmosphere is vacuum, and the vacuum degree is 0.5pa, and finally obtaining ceramic oxide containing a carburized layer;
s4, obtaining a mixture of ceramic powder through ball milling treatment;
mixing and ball milling ceramic oxide containing carburized layer, cerium oxide, yttrium oxide and lanthanum oxide for 3h at 400rpm to obtain ceramic powder mixture;
s5, obtaining ceramic paint through stirring and ultrasonic technology;
and stirring the mixture of the ceramic powder and the self-drying slurry, and performing ultrasonic dispersion, wherein the stirring speed is 200rpm, and the stirring time is 60min to obtain the ceramic coating.
Example 3:
step S1, preparing raw materials according to mass proportion;
the raw materials are prepared according to the mass ratio: 30 parts of aqueous polyurethane resin, 25 parts of aqueous saturated polyester resin, 20 parts of aqueous organic silicon resin, 5 parts of n-butyl titanate, 5 parts of ethyl cellulose, 3 parts of alumina fiber, 30 parts of zirconia, 30 parts of silicon dioxide, 20 parts of feldspar, 10 parts of boron nitride, 10 parts of silicon carbide, 0.6 part of cerium oxide, 0.2 part of yttrium oxide, 0.2 part of lanthanum oxide and 3 parts of carbon powder;
s2, preparing self-drying slurry through a ball milling process;
mixing and ball milling aqueous polyurethane resin, aqueous saturated polyester resin, aqueous organic silicon resin, n-butyl titanate and ethyl cellulose according to a configuration proportion to obtain a solvent, wherein the ball milling time is 8 hours, the ball milling medium is zirconium balls, and the ball milling rotating speed is 300rpm;
mixing and ball-milling alumina fiber, silicon carbide and 2 parts of carbon powder to obtain mixed ceramic powder, wherein the ball-milling time is 3h, and the ball-milling rotating speed is 150rpm to obtain mixed powder I containing the carbon powder;
carrying out three ball milling treatments on the mixed powder containing carbon powder and a solvent, wherein the ball milling time is 2 hours, and the ball milling rotating speed is 150rpm to obtain self-drying slurry;
step S3, obtaining ceramic oxide containing a carburized layer through carburization treatment;
mixing zirconia, silica, feldspar and 1 part of carbon powder, ball milling to obtain mixed ceramic powder, wherein the ball milling time is 4 hours, and the ball milling rotating speed is 300rpm to obtain mixed powder II containing the carbon powder;
carburizing the mixed ceramic powder, wherein the carburizing temperature is 1200 ℃, the treatment time is 3 hours, the treatment atmosphere is vacuum, and the vacuum degree is 0.3pa, and finally obtaining ceramic oxide containing a carburized layer;
s4, obtaining a mixture of ceramic powder through ball milling treatment;
mixing and ball milling ceramic oxide containing carburized layer, cerium oxide, yttrium oxide and lanthanum oxide for 2h at 300rpm to obtain ceramic powder mixture;
s5, obtaining ceramic paint through stirring and ultrasonic technology;
and stirring the mixture of the ceramic powder and the self-drying slurry, and performing ultrasonic dispersion, wherein the stirring speed is 150rpm, and the stirring time is 40min to obtain the ceramic coating.
Comparative example 1:
step S1, preparing raw materials according to mass proportion;
the raw materials are prepared according to the mass ratio: 30 parts of aqueous polyurethane resin, 25 parts of aqueous saturated polyester resin, 20 parts of aqueous organic silicon resin, 5 parts of n-butyl titanate, 5 parts of ethyl cellulose, 30 parts of zirconium oxide, 30 parts of silicon dioxide, 20 parts of feldspar, 10 parts of boron nitride, 10 parts of silicon carbide, 0.6 part of cerium oxide, 0.2 part of yttrium oxide, 0.2 part of lanthanum oxide and 3 parts of carbon powder;
s2, preparing self-drying slurry through a ball milling process;
mixing and ball milling aqueous polyurethane resin, aqueous saturated polyester resin, aqueous organic silicon resin, n-butyl titanate and ethyl cellulose according to a configuration proportion to obtain a solvent, wherein the ball milling time is 8 hours, the ball milling medium is zirconium balls, and the ball milling rotating speed is 300rpm;
mixing and ball milling silicon carbide and 2 parts of carbon powder to obtain mixed ceramic powder, wherein the ball milling time is 3h, and the ball milling rotating speed is 150rpm to obtain mixed powder I containing carbon powder;
carrying out three ball milling treatments on the mixed powder containing carbon powder and a solvent, wherein the ball milling time is 2 hours, and the ball milling rotating speed is 150rpm to obtain self-drying slurry;
step S3, obtaining ceramic oxide containing a carburized layer through carburization treatment;
mixing zirconia, silica, feldspar and 1 part of carbon powder, ball milling to obtain mixed ceramic powder, wherein the ball milling time is 4 hours, and the ball milling rotating speed is 300rpm to obtain mixed powder II containing the carbon powder;
carburizing the mixed ceramic powder, wherein the carburizing temperature is 1200 ℃, the treatment time is 3 hours, the treatment atmosphere is vacuum, and the vacuum degree is 0.3pa, and finally obtaining ceramic oxide containing a carburized layer;
s4, obtaining a mixture of ceramic powder through ball milling treatment;
mixing and ball milling ceramic oxide containing carburized layer, cerium oxide, yttrium oxide and lanthanum oxide for 2h at 300rpm to obtain ceramic powder mixture;
s5, obtaining ceramic paint through stirring and ultrasonic technology;
and stirring the mixture of the ceramic powder and the self-drying slurry, and performing ultrasonic dispersion, wherein the stirring speed is 150rpm, and the stirring time is 40min to obtain the ceramic coating.
Comparative example 2:
step S1, preparing raw materials according to mass proportion;
the raw materials are prepared according to the mass ratio: 30 parts of aqueous polyurethane resin, 25 parts of aqueous saturated polyester resin, 20 parts of aqueous organic silicon resin, 5 parts of n-butyl titanate, 5 parts of ethyl cellulose, 3 parts of alumina fiber, 30 parts of zirconia, 30 parts of silicon dioxide, 20 parts of feldspar, 10 parts of boron nitride and 10 parts of silicon carbide;
s2, preparing self-drying slurry through a ball milling process;
mixing and ball milling aqueous polyurethane resin, aqueous saturated polyester resin, aqueous organic silicon resin, n-butyl titanate and ethyl cellulose according to a configuration proportion to obtain a solvent, wherein the ball milling time is 8 hours, the ball milling medium is zirconium balls, and the ball milling rotating speed is 300rpm;
mixing and ball-milling alumina fiber, silicon carbide and 2 parts of carbon powder to obtain mixed ceramic powder, wherein the ball-milling time is 3h, and the ball-milling rotating speed is 150rpm to obtain mixed powder I containing the carbon powder;
carrying out three ball milling treatments on the mixed powder containing carbon powder and a solvent, wherein the ball milling time is 2 hours, and the ball milling rotating speed is 150rpm to obtain self-drying slurry;
step S3, obtaining ceramic oxide containing a carburized layer through carburization treatment;
mixing zirconia, silica, feldspar and 1 part of carbon powder, ball milling to obtain mixed ceramic powder, wherein the ball milling time is 4 hours, and the ball milling rotating speed is 300rpm to obtain mixed powder II containing the carbon powder;
carburizing the mixed ceramic powder, wherein the carburizing temperature is 1200 ℃, the treatment time is 3 hours, the treatment atmosphere is vacuum, and the vacuum degree is 0.3pa, and finally obtaining ceramic oxide containing a carburized layer;
s4, obtaining a mixture of ceramic powder through ball milling treatment;
ball milling is carried out on the ceramic oxide containing the carburized layer for 2 hours at the ball milling rotating speed of 300rpm to obtain a mixture of ceramic powder;
s5, obtaining ceramic paint through stirring and ultrasonic technology;
and stirring the mixture of the ceramic powder and the self-drying slurry, and performing ultrasonic dispersion, wherein the stirring speed is 150rpm, and the stirring time is 40min to obtain the ceramic coating.
Comparative example 3:
step S1, preparing raw materials according to mass proportion;
the raw materials are prepared according to the mass ratio: 30 parts of aqueous polyurethane resin, 25 parts of aqueous saturated polyester resin, 20 parts of aqueous organic silicon resin, 5 parts of n-butyl titanate, 5 parts of ethyl cellulose, 3 parts of alumina fiber, 30 parts of zirconia, 30 parts of silicon dioxide, 20 parts of feldspar, 10 parts of boron nitride, 10 parts of silicon carbide, 0.6 part of cerium oxide, 0.2 part of yttrium oxide, 0.2 part of lanthanum oxide and 2 parts of carbon powder;
s2, preparing self-drying slurry through a ball milling process;
mixing and ball milling aqueous polyurethane resin, aqueous saturated polyester resin, aqueous organic silicon resin, n-butyl titanate and ethyl cellulose according to a configuration proportion to obtain a solvent, wherein the ball milling time is 8 hours, the ball milling medium is zirconium balls, and the ball milling rotating speed is 300rpm;
mixing and ball-milling alumina fiber, silicon carbide and 2 parts of carbon powder to obtain mixed ceramic powder, wherein the ball-milling time is 3h, and the ball-milling rotating speed is 150rpm to obtain mixed powder I containing the carbon powder;
carrying out three ball milling treatments on the mixed powder containing carbon powder and a solvent, wherein the ball milling time is 2 hours, and the ball milling rotating speed is 150rpm to obtain self-drying slurry;
step S3, obtaining a mixture of ceramic powder through ball milling treatment;
mixing zirconia, silica, feldspar, cerium oxide, yttrium oxide and lanthanum oxide, performing ball milling for 2 hours at a ball milling rotating speed of 300rpm to obtain a mixture of ceramic powder;
s4, obtaining ceramic paint through stirring and ultrasonic technology;
and stirring the mixture of the ceramic powder and the self-drying slurry, and performing ultrasonic dispersion, wherein the stirring speed is 150rpm, and the stirring time is 40min to obtain the ceramic coating.
Comparative example 4:
step S1, preparing raw materials according to mass proportion;
the raw materials are prepared according to the mass ratio: 30 parts of aqueous polyurethane resin, 25 parts of aqueous saturated polyester resin, 20 parts of aqueous organic silicon resin, 5 parts of n-butyl titanate, 5 parts of ethyl cellulose, 3 parts of alumina fiber, 30 parts of zirconia, 30 parts of silicon dioxide, 20 parts of feldspar, 10 parts of boron nitride, 10 parts of silicon carbide, 0.6 part of cerium oxide, 0.2 part of yttrium oxide, 0.2 part of lanthanum oxide and 10 parts of carbon powder;
s2, preparing self-drying slurry through a ball milling process;
mixing and ball milling aqueous polyurethane resin, aqueous saturated polyester resin, aqueous organic silicon resin, n-butyl titanate and ethyl cellulose according to a configuration proportion to obtain a solvent, wherein the ball milling time is 8 hours, the ball milling medium is zirconium balls, and the ball milling rotating speed is 300rpm;
mixing and ball-milling alumina fiber, silicon carbide and 9 parts of carbon powder to obtain mixed ceramic powder, wherein the ball-milling time is 3h, and the ball-milling rotating speed is 150rpm to obtain mixed powder I containing carbon powder;
carrying out three ball milling treatments on the mixed powder containing carbon powder and a solvent, wherein the ball milling time is 2 hours, and the ball milling rotating speed is 150rpm to obtain self-drying slurry;
step S3, obtaining ceramic oxide containing a carburized layer through carburization treatment;
mixing zirconia, silica, feldspar and 1 part of carbon powder, ball milling to obtain mixed ceramic powder, wherein the ball milling time is 4 hours, and the ball milling rotating speed is 300rpm to obtain mixed powder II containing the carbon powder;
carburizing the mixed ceramic powder, wherein the carburizing temperature is 1200 ℃, the treatment time is 3 hours, the treatment atmosphere is vacuum, and the vacuum degree is 0.3pa, and finally obtaining ceramic oxide containing a carburized layer;
s4, obtaining a mixture of ceramic powder through ball milling treatment;
mixing and ball milling ceramic oxide containing carburized layer, cerium oxide, yttrium oxide and lanthanum oxide for 2h at 300rpm to obtain ceramic powder mixture;
s5, obtaining ceramic paint through stirring and ultrasonic technology;
and stirring the mixture of the ceramic powder and the self-drying slurry, and performing ultrasonic dispersion, wherein the stirring speed is 150rpm, and the stirring time is 40min to obtain the ceramic coating.
Comparative example 5:
step S1, preparing raw materials according to mass proportion;
the raw materials are prepared according to the mass ratio: 30 parts of aqueous polyurethane resin, 25 parts of aqueous saturated polyester resin, 20 parts of aqueous organic silicon resin, 5 parts of n-butyl titanate, 5 parts of ethyl cellulose, 3 parts of alumina fiber, 30 parts of zirconia, 30 parts of silicon dioxide, 20 parts of feldspar, 10 parts of boron nitride, 0.6 part of cerium oxide, 0.2 part of yttrium oxide, 0.2 part of lanthanum oxide and 3 parts of carbon powder;
s2, preparing self-drying slurry through a ball milling process;
mixing and ball milling aqueous polyurethane resin, aqueous saturated polyester resin, aqueous organic silicon resin, n-butyl titanate and ethyl cellulose according to a configuration proportion to obtain a solvent, wherein the ball milling time is 8 hours, the ball milling medium is zirconium balls, and the ball milling rotating speed is 300rpm;
mixing and ball milling alumina fiber and 2 parts of carbon powder to obtain mixed ceramic powder, wherein the ball milling time is 3h, and the ball milling rotating speed is 150rpm to obtain mixed powder I containing carbon powder;
carrying out three ball milling treatments on the mixed powder containing carbon powder and a solvent, wherein the ball milling time is 2 hours, and the ball milling rotating speed is 150rpm to obtain self-drying slurry;
step S3, obtaining ceramic oxide containing a carburized layer through carburization treatment;
mixing zirconia, silica, feldspar and 1 part of carbon powder, ball milling to obtain mixed ceramic powder, wherein the ball milling time is 4 hours, and the ball milling rotating speed is 300rpm to obtain mixed powder II containing the carbon powder;
carburizing the mixed ceramic powder, wherein the carburizing temperature is 1200 ℃, the treatment time is 3 hours, the treatment atmosphere is vacuum, and the vacuum degree is 0.3pa, and finally obtaining ceramic oxide containing a carburized layer;
s4, obtaining a mixture of ceramic powder through ball milling treatment;
mixing and ball milling ceramic oxide containing carburized layer, cerium oxide, yttrium oxide and lanthanum oxide for 2h at 300rpm to obtain ceramic powder mixture;
s5, obtaining ceramic paint through stirring and ultrasonic technology;
and stirring the mixture of the ceramic powder and the self-drying slurry, and performing ultrasonic dispersion, wherein the stirring speed is 150rpm, and the stirring time is 40min to obtain the ceramic coating.
Comparative example 6:
step S1, preparing raw materials according to mass proportion;
the raw materials are prepared according to the mass ratio: 30 parts of aqueous polyurethane resin, 25 parts of aqueous saturated polyester resin, 20 parts of aqueous organic silicon resin, 5 parts of n-butyl titanate, 5 parts of ethyl cellulose, 3 parts of alumina fiber, 30 parts of zirconia, 30 parts of silicon dioxide, 20 parts of feldspar, 10 parts of boron nitride, 10 parts of silicon carbide, 0.6 part of cerium oxide, 0.2 part of yttrium oxide, 0.2 part of lanthanum oxide and 3 parts of carbon powder;
s2, preparing self-drying slurry through a ball milling process;
mixing and ball milling aqueous polyurethane resin, aqueous saturated polyester resin, aqueous organic silicon resin, n-butyl titanate and ethyl cellulose according to a configuration proportion to obtain a solvent, wherein the ball milling time is 8 hours, the ball milling medium is zirconium balls, and the ball milling rotating speed is 300rpm;
mixing and ball-milling alumina fiber, silicon carbide and 2 parts of carbon powder to obtain mixed ceramic powder, wherein the ball-milling time is 3h, and the ball-milling rotating speed is 150rpm to obtain mixed powder I containing the carbon powder;
carrying out three ball milling treatments on the mixed powder containing carbon powder and a solvent, wherein the ball milling time is 2 hours, and the ball milling rotating speed is 150rpm to obtain self-drying slurry;
step S3, obtaining ceramic oxide containing a carburized layer through carburization treatment;
mixing zirconia, silica, feldspar and 1 part of carbon powder, ball milling to obtain mixed ceramic powder, wherein the ball milling time is 4 hours, and the ball milling rotating speed is 300rpm to obtain mixed powder II containing the carbon powder;
carburizing the mixed ceramic powder, wherein the carburizing temperature is 1200 ℃, the treatment time is 3 hours, the treatment atmosphere is vacuum, and the vacuum degree is 0.3pa, and finally obtaining ceramic oxide containing a carburized layer;
s4, obtaining a mixture of ceramic powder through ball milling treatment;
mixing and ball milling ceramic oxide containing carburized layer, cerium oxide, yttrium oxide and lanthanum oxide for 0.5h at 50rpm to obtain ceramic powder mixture;
s5, obtaining ceramic paint through stirring and ultrasonic technology;
and stirring the mixture of the ceramic powder and the self-drying slurry, and performing ultrasonic dispersion, wherein the stirring speed is 150rpm, and the stirring time is 40min to obtain the ceramic coating.
Comparative example 7:
step S1, preparing raw materials according to mass proportion;
the raw materials are prepared according to the mass ratio: 30 parts of aqueous polyurethane resin, 25 parts of aqueous saturated polyester resin, 20 parts of aqueous organic silicon resin, 5 parts of n-butyl titanate, 3 parts of alumina fiber, 30 parts of zirconia, 30 parts of silica, 20 parts of feldspar, 10 parts of boron nitride, 10 parts of silicon carbide, 0.6 part of cerium oxide, 0.2 part of yttrium oxide, 0.2 part of lanthanum oxide and 3 parts of carbon powder;
s2, preparing self-drying slurry through a ball milling process;
mixing and ball milling aqueous polyurethane resin, aqueous saturated polyester resin, aqueous organic silicon resin and n-butyl titanate according to a configuration proportion to obtain a solvent, wherein the ball milling time is 8 hours, the ball milling medium is zirconium balls, and the ball milling rotating speed is 300rpm;
mixing and ball-milling alumina fiber, silicon carbide and 2 parts of carbon powder to obtain mixed ceramic powder, wherein the ball-milling time is 3h, and the ball-milling rotating speed is 150rpm to obtain mixed powder I containing the carbon powder;
carrying out three ball milling treatments on the mixed powder containing carbon powder and a solvent, wherein the ball milling time is 2 hours, and the ball milling rotating speed is 150rpm to obtain self-drying slurry;
step S3, obtaining ceramic oxide containing a carburized layer through carburization treatment;
mixing zirconia, silica, feldspar and 1 part of carbon powder, ball milling to obtain mixed ceramic powder, wherein the ball milling time is 4 hours, and the ball milling rotating speed is 300rpm to obtain mixed powder II containing the carbon powder;
carburizing the mixed ceramic powder, wherein the carburizing temperature is 1200 ℃, the treatment time is 3 hours, the treatment atmosphere is vacuum, and the vacuum degree is 0.3pa, and finally obtaining ceramic oxide containing a carburized layer;
s4, obtaining a mixture of ceramic powder through ball milling treatment;
mixing and ball milling ceramic oxide containing carburized layer, cerium oxide, yttrium oxide and lanthanum oxide for 2h at 300rpm to obtain ceramic powder mixture;
s5, obtaining ceramic paint through stirring and ultrasonic technology;
and stirring the mixture of the ceramic powder and the self-drying slurry, and performing ultrasonic dispersion, wherein the stirring speed is 150rpm, and the stirring time is 40min to obtain the ceramic coating.
Comparative example 8:
step S1, preparing raw materials according to mass proportion;
the raw materials are prepared according to the mass ratio: 30 parts of aqueous polyurethane resin, 25 parts of aqueous saturated polyester resin, 20 parts of aqueous organic silicon resin, 5 parts of n-butyl titanate, 5 parts of ethyl cellulose, 3 parts of alumina fiber, 30 parts of zirconia, 30 parts of silicon dioxide, 20 parts of feldspar, 10 parts of boron nitride, 10 parts of silicon carbide, 0.6 part of cerium oxide, 0.2 part of yttrium oxide, 0.2 part of lanthanum oxide and 3 parts of carbon powder;
s2, preparing self-drying slurry through a ball milling process;
mixing and ball milling aqueous polyurethane resin, aqueous saturated polyester resin, aqueous organic silicon resin, n-butyl titanate and ethyl cellulose according to a configuration proportion to obtain a solvent, wherein the ball milling time is 8 hours, the ball milling medium is zirconium balls, and the ball milling rotating speed is 300rpm;
mixing and ball milling alumina fiber and silicon carbide to obtain mixed ceramic powder, wherein the ball milling time is 3h, and the ball milling rotating speed is 150rpm to obtain mixed powder I containing carbon powder;
carrying out three ball milling treatments on the mixed powder containing carbon powder and a solvent, wherein the ball milling time is 2 hours, and the ball milling rotating speed is 150rpm to obtain self-drying slurry;
step S3, obtaining ceramic oxide containing a carburized layer through carburization treatment;
mixing zirconia, silica, feldspar and 1 part of carbon powder, ball milling to obtain mixed ceramic powder, wherein the ball milling time is 4 hours, and the ball milling rotating speed is 300rpm to obtain mixed powder II containing the carbon powder;
carburizing the mixed ceramic powder, wherein the carburizing temperature is 1200 ℃, the treatment time is 3 hours, the treatment atmosphere is vacuum, and the vacuum degree is 0.3pa, and finally obtaining ceramic oxide containing a carburized layer;
s4, obtaining a mixture of ceramic powder through ball milling treatment;
mixing and ball milling ceramic oxide containing carburized layer, cerium oxide, yttrium oxide and lanthanum oxide for 2h at 300rpm to obtain ceramic powder mixture;
s5, obtaining ceramic paint through stirring and ultrasonic technology;
and stirring and ultrasonically dispersing 2 parts of a mixture of carbon powder and ceramic powder with the self-drying slurry, wherein the stirring speed is 150rpm, and the stirring time is 40min to obtain the ceramic coating.
Table 1:
as can be seen from the data in Table 1, after the rare earth is used for improving the ceramic powder, the wear resistance of the ceramic coating is obviously improved, in addition, the addition of alumina fiber in the coating has obvious enhancement effect on the adhesive force and wear resistance of the material, and the independent stirring of carbon powder also has adverse effect on the performance of the coating due to uneven distribution caused by lighter mass of the carbon powder.
Claims (7)
1. The preparation method of the normal-temperature self-drying high-temperature anti-corrosion nano ceramic coating is characterized by comprising the following steps of:
step S1, preparing raw materials according to mass proportion;
wherein, 20-45 parts of aqueous polyurethane resin, 15-35 parts of aqueous saturated polyester resin, 10-30 parts of aqueous organic silicon resin, 2-7 parts of n-butyl titanate, 2-7 parts of ethyl cellulose, 1-5 parts of alumina fiber, 25-35 parts of zirconia, 20-40 parts of silicon dioxide, 15-25 parts of feldspar, 5-15 parts of boron nitride, 5-15 parts of silicon carbide, 0.4-0.8 part of cerium oxide, 0.1-0.3 part of yttrium oxide, 0.1-0.3 part of lanthanum oxide and 2-4 parts of carbon powder; wherein, the diameter of the alumina fiber is 1-5um, the length of the alumina fiber is 30-70um, the zirconia is 300 meshes, the silica is 200 meshes, the feldspar is 300 meshes, the boron nitride is 300 meshes and the silicon carbide is 300 meshes;
s2, preparing self-drying slurry through a ball milling process;
mixing and ball milling aqueous polyurethane resin, aqueous saturated polyester resin, aqueous organic silicon resin, n-butyl titanate and ethyl cellulose according to a configuration proportion to obtain a solvent;
mixing and ball milling alumina fiber, silicon carbide and 1-2 parts of carbon powder to obtain mixed ceramic powder;
performing ball milling treatment on the mixed ceramic powder containing carbon powder and a solvent for the third time to obtain self-drying slurry;
step S3, obtaining ceramic oxide containing a carburized layer through carburization treatment;
mixing and ball milling zirconium oxide, silicon dioxide, feldspar and 1-2 parts of carbon powder to obtain mixed ceramic powder;
carburizing the mixed ceramic powder to obtain ceramic oxide containing a carburized layer;
s4, obtaining a mixture of ceramic powder through ball milling treatment;
mixing and ball milling ceramic oxide containing carburized layer, cerium oxide, yttrium oxide and lanthanum oxide for 1-3h at 200-400rpm to obtain ceramic powder mixture;
wherein the ball milling time is 1-3h, and the ball milling rotating speed is 200-400rpm;
step S5, obtaining the ceramic coating through stirring and ultrasonic processes:
and stirring the mixture of the ceramic powder and the self-drying slurry, and performing ultrasonic dispersion to obtain the ceramic coating.
2. The method for preparing the normal-temperature self-drying high-temperature anti-corrosion nano ceramic coating according to claim 1, which is characterized in that,
the step of carrying out mixing ball milling treatment on the aqueous polyurethane resin, the aqueous saturated polyester resin, the aqueous organic silicon resin, the n-butyl titanate and the ethyl cellulose according to the configuration proportion to obtain a solvent comprises the following steps:
mixing and ball milling aqueous polyurethane resin, aqueous saturated polyester resin, aqueous organic silicon resin, n-butyl titanate and ethyl cellulose according to a configuration proportion to obtain a solvent, wherein the ball milling time is 6-10h, the ball milling medium is zirconium balls, and the ball milling rotating speed is 200-400rpm.
3. The method for preparing the normal-temperature self-drying high-temperature anti-corrosion nano ceramic coating according to claim 1, which is characterized in that,
the step of carrying out mixed ball milling on alumina fiber, silicon carbide and 1-2 parts of carbon powder to obtain mixed ceramic powder comprises the following steps:
mixing and ball milling alumina fiber, silicon carbide and 1-2 parts of carbon powder to obtain mixed ceramic powder, wherein the ball milling time is 2-3h, and the ball milling rotating speed is 100-200rpm to obtain mixed powder I containing the carbon powder.
4. The method for preparing the normal-temperature self-drying high-temperature anti-corrosion nano ceramic coating according to claim 1, which is characterized in that,
the step of performing ball milling treatment on the mixed powder containing carbon powder and the solvent for the third time to obtain self-drying slurry comprises the following steps:
and carrying out ball milling treatment on the mixed powder containing carbon powder and the solvent for the third time, wherein the ball milling time is 1-2h, and the ball milling rotating speed is 100-200rpm to obtain self-drying slurry.
5. The method for preparing the normal-temperature self-drying high-temperature anti-corrosion nano ceramic coating according to claim 1, which is characterized in that,
the step of mixing and ball milling zirconia, silicon dioxide, feldspar and 1-2 parts of carbon powder to obtain mixed ceramic powder comprises the following steps:
mixing and ball milling zirconium oxide, silicon dioxide, feldspar and 1-2 parts of carbon powder to obtain mixed ceramic powder, wherein the ball milling time is 3-5h, and the ball milling rotating speed is 200-400rpm to obtain mixed powder II containing the carbon powder.
6. The method for preparing the normal-temperature self-drying high-temperature anti-corrosion nano ceramic coating according to claim 1, which is characterized in that,
the step of carburizing the mixed ceramic powder to obtain the ceramic oxide containing the carburized layer comprises the following steps:
carburizing the mixed ceramic powder, wherein the carburizing temperature is 1000-1400 ℃, the treatment time is 2-4h, the treatment atmosphere is vacuum, and the vacuum degree is 0.1-0.5pa, and finally obtaining the ceramic oxide containing the carburized layer.
7. The method for preparing the normal-temperature self-drying high-temperature anti-corrosion nano ceramic coating according to claim 1, which is characterized in that,
the step of stirring and ultrasonic dispersing the mixture of the ceramic powder and the self-drying slurry to obtain the ceramic coating comprises the following steps:
stirring the mixture of the ceramic powder and the self-drying slurry, and performing ultrasonic dispersion, wherein the stirring speed is 100-200rpm, and the stirring time is 30-60min to obtain the ceramic coating.
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