CN114149743A - High-temperature anti-corrosion aluminum sacrificial coating and preparation method thereof - Google Patents
High-temperature anti-corrosion aluminum sacrificial coating and preparation method thereof Download PDFInfo
- Publication number
- CN114149743A CN114149743A CN202111167888.4A CN202111167888A CN114149743A CN 114149743 A CN114149743 A CN 114149743A CN 202111167888 A CN202111167888 A CN 202111167888A CN 114149743 A CN114149743 A CN 114149743A
- Authority
- CN
- China
- Prior art keywords
- phosphate
- mixture
- aluminum
- temperature
- prepolymer
- 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
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 title claims abstract description 88
- 229910052782 aluminium Inorganic materials 0.000 title claims abstract description 49
- 238000005260 corrosion Methods 0.000 title claims abstract description 45
- 239000011248 coating agent Substances 0.000 title claims abstract description 40
- 238000000576 coating method Methods 0.000 title claims abstract description 40
- 238000002360 preparation method Methods 0.000 title claims abstract description 17
- 229910019142 PO4 Inorganic materials 0.000 claims abstract description 62
- NBIIXXVUZAFLBC-UHFFFAOYSA-K phosphate Chemical compound [O-]P([O-])([O-])=O NBIIXXVUZAFLBC-UHFFFAOYSA-K 0.000 claims abstract description 62
- 239000010452 phosphate Substances 0.000 claims abstract description 62
- 239000000203 mixture Substances 0.000 claims abstract description 40
- 230000007797 corrosion Effects 0.000 claims abstract description 39
- 239000011521 glass Substances 0.000 claims abstract description 36
- 239000000843 powder Substances 0.000 claims abstract description 34
- 239000003973 paint Substances 0.000 claims abstract description 30
- 238000000227 grinding Methods 0.000 claims abstract description 25
- 239000003112 inhibitor Substances 0.000 claims abstract description 24
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 19
- 239000000463 material Substances 0.000 claims abstract description 15
- 238000002156 mixing Methods 0.000 claims abstract description 10
- 239000012752 auxiliary agent Substances 0.000 claims abstract description 9
- DLYUQMMRRRQYAE-UHFFFAOYSA-N tetraphosphorus decaoxide Chemical compound O1P(O2)(=O)OP3(=O)OP1(=O)OP2(=O)O3 DLYUQMMRRRQYAE-UHFFFAOYSA-N 0.000 claims description 36
- NBIIXXVUZAFLBC-UHFFFAOYSA-N Phosphoric acid Chemical compound OP(O)(O)=O NBIIXXVUZAFLBC-UHFFFAOYSA-N 0.000 claims description 32
- 239000004576 sand Substances 0.000 claims description 18
- 229910000147 aluminium phosphate Inorganic materials 0.000 claims description 16
- 238000006243 chemical reaction Methods 0.000 claims description 16
- 238000009833 condensation Methods 0.000 claims description 16
- 230000005494 condensation Effects 0.000 claims description 16
- 238000007599 discharging Methods 0.000 claims description 16
- 239000006185 dispersion Substances 0.000 claims description 16
- 239000000395 magnesium oxide Substances 0.000 claims description 16
- CPLXHLVBOLITMK-UHFFFAOYSA-N magnesium oxide Inorganic materials [Mg]=O CPLXHLVBOLITMK-UHFFFAOYSA-N 0.000 claims description 16
- AXZKOIWUVFPNLO-UHFFFAOYSA-N magnesium;oxygen(2-) Chemical compound [O-2].[Mg+2] AXZKOIWUVFPNLO-UHFFFAOYSA-N 0.000 claims description 16
- 238000010992 reflux Methods 0.000 claims description 16
- 238000003756 stirring Methods 0.000 claims description 16
- 239000003795 chemical substances by application Substances 0.000 claims description 12
- 238000001816 cooling Methods 0.000 claims description 12
- 239000002270 dispersing agent Substances 0.000 claims description 12
- 239000000080 wetting agent Substances 0.000 claims description 12
- 239000002245 particle Substances 0.000 claims description 10
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 claims description 8
- 239000002244 precipitate Substances 0.000 claims description 8
- 238000005303 weighing Methods 0.000 claims description 8
- 239000011701 zinc Substances 0.000 claims description 8
- 229910052725 zinc Inorganic materials 0.000 claims description 8
- 238000000034 method Methods 0.000 claims description 7
- LJKDOMVGKKPJBH-UHFFFAOYSA-N 2-ethylhexyl dihydrogen phosphate Chemical compound CCCCC(CC)COP(O)(O)=O LJKDOMVGKKPJBH-UHFFFAOYSA-N 0.000 claims description 6
- TVACALAUIQMRDF-UHFFFAOYSA-N dodecyl dihydrogen phosphate Chemical compound CCCCCCCCCCCCOP(O)(O)=O TVACALAUIQMRDF-UHFFFAOYSA-N 0.000 claims description 6
- 229940051841 polyoxyethylene ether Drugs 0.000 claims description 6
- 229920000056 polyoxyethylene ether Polymers 0.000 claims description 6
- 235000019832 sodium triphosphate Nutrition 0.000 claims description 6
- UNXRWKVEANCORM-UHFFFAOYSA-I triphosphate(5-) Chemical compound [O-]P([O-])(=O)OP([O-])(=O)OP([O-])([O-])=O UNXRWKVEANCORM-UHFFFAOYSA-I 0.000 claims description 6
- XGCQIVYCVYWYCW-UHFFFAOYSA-L zinc;2-nitrobenzene-1,3-dicarboxylate Chemical compound [Zn+2].[O-]C(=O)C1=CC=CC(C([O-])=O)=C1[N+]([O-])=O XGCQIVYCVYWYCW-UHFFFAOYSA-L 0.000 claims description 6
- DUIOKRXOKLLURE-UHFFFAOYSA-N 2-octylphenol Chemical compound CCCCCCCCC1=CC=CC=C1O DUIOKRXOKLLURE-UHFFFAOYSA-N 0.000 claims description 5
- 239000013530 defoamer Substances 0.000 claims description 5
- UHGIMQLJWRAPLT-UHFFFAOYSA-N octadecyl dihydrogen phosphate Chemical compound CCCCCCCCCCCCCCCCCCOP(O)(O)=O UHGIMQLJWRAPLT-UHFFFAOYSA-N 0.000 claims description 5
- NIXOWILDQLNWCW-UHFFFAOYSA-N acrylic acid group Chemical group C(C=C)(=O)O NIXOWILDQLNWCW-UHFFFAOYSA-N 0.000 claims description 4
- 238000000889 atomisation Methods 0.000 claims description 4
- -1 polysiloxane Polymers 0.000 claims description 4
- 229920001296 polysiloxane Polymers 0.000 claims description 4
- 239000004814 polyurethane Substances 0.000 claims description 4
- 229920002635 polyurethane Polymers 0.000 claims description 4
- 239000002671 adjuvant Substances 0.000 claims 1
- 239000011159 matrix material Substances 0.000 abstract description 6
- 238000004381 surface treatment Methods 0.000 abstract description 2
- 239000000758 substrate Substances 0.000 description 16
- CSCPPACGZOOCGX-UHFFFAOYSA-N Acetone Chemical compound CC(C)=O CSCPPACGZOOCGX-UHFFFAOYSA-N 0.000 description 10
- 239000002518 antifoaming agent Substances 0.000 description 7
- 239000007921 spray Substances 0.000 description 7
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 6
- 150000003839 salts Chemical class 0.000 description 6
- 238000007664 blowing Methods 0.000 description 5
- 238000004140 cleaning Methods 0.000 description 5
- 230000007935 neutral effect Effects 0.000 description 5
- 238000005507 spraying Methods 0.000 description 5
- SMZOUWXMTYCWNB-UHFFFAOYSA-N 2-(2-methoxy-5-methylphenyl)ethanamine Chemical compound COC1=CC=C(C)C=C1CCN SMZOUWXMTYCWNB-UHFFFAOYSA-N 0.000 description 3
- 239000008199 coating composition Substances 0.000 description 2
- 230000032683 aging Effects 0.000 description 1
- 239000011230 binding agent Substances 0.000 description 1
- 238000000354 decomposition reaction Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 125000002887 hydroxy group Chemical group [H]O* 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- LAQFLZHBVPULPL-UHFFFAOYSA-N methyl(phenyl)silicon Chemical compound C[Si]C1=CC=CC=C1 LAQFLZHBVPULPL-UHFFFAOYSA-N 0.000 description 1
- RXHKNBZWGONHNK-UHFFFAOYSA-N octadecan-2-yl dihydrogen phosphate Chemical compound CCCCCCCCCCCCCCCCC(C)OP(=O)(O)O RXHKNBZWGONHNK-UHFFFAOYSA-N 0.000 description 1
- 229920000137 polyphosphoric acid Polymers 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- RMAQACBXLXPBSY-UHFFFAOYSA-N silicic acid Chemical compound O[Si](O)(O)O RMAQACBXLXPBSY-UHFFFAOYSA-N 0.000 description 1
- 229920002050 silicone resin Polymers 0.000 description 1
Classifications
-
- 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
- C09D185/00—Coating compositions based on macromolecular compounds obtained by reactions forming in the main chain of the macromolecule a linkage containing atoms other than silicon, sulfur, nitrogen, oxygen, and carbon; Coating compositions based on derivatives of such polymers
- C09D185/02—Coating compositions based on macromolecular compounds obtained by reactions forming in the main chain of the macromolecule a linkage containing atoms other than silicon, sulfur, nitrogen, oxygen, and carbon; Coating compositions based on derivatives of such polymers containing phosphorus
-
- 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
- C09D5/10—Anti-corrosive paints containing metal dust
- C09D5/103—Anti-corrosive paints containing metal dust containing Al
-
- 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
- C09D5/18—Fireproof paints including high temperature resistant 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
-
- 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
- C09D7/63—Additives non-macromolecular organic
-
- 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
- C08K3/02—Elements
- C08K3/08—Metals
- C08K2003/0812—Aluminium
-
- 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
- C08K3/32—Phosphorus-containing compounds
- C08K2003/321—Phosphates
- C08K2003/327—Aluminium phosphate
Landscapes
- Chemical & Material Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Wood Science & Technology (AREA)
- Organic Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Inorganic Chemistry (AREA)
- Preventing Corrosion Or Incrustation Of Metals (AREA)
- Paints Or Removers (AREA)
Abstract
The invention discloses a high-temperature anticorrosive aluminum sacrificial coating and a preparation method thereof, belonging to the technical field of surface treatment. The invention relates to a high-temperature anticorrosion aluminum sacrificial coating, which is formed by mixing a phosphate prepolymer, a corrosion inhibitor, an auxiliary agent, spherical aluminum powder, glass powder and water, wherein the phosphate prepolymer accounts for 35-45% of the weight of a mixture, the corrosion inhibitor accounts for 3-5% of the weight of the mixture, the auxiliary agent accounts for 1-3% of the weight of the mixture, the spherical aluminum powder accounts for 25-35% of the weight of the mixture, the glass powder accounts for 5-10% of the weight of the mixture, and the balance is water. The preparation steps of the invention are as follows: preparing a phosphate prepolymer; preparing materials; grinding; and (5) paint mixing. The invention greatly improves the high temperature-corrosion resistance cycle performance on the basis of high temperature resistance and corrosion resistance, and more effectively ensures the reliability of a high temperature running matrix.
Description
Technical Field
The invention discloses a high-temperature anticorrosive aluminum sacrificial coating and a preparation method thereof, belonging to the technical field of surface treatment.
Background
High temperature boilers, pipelines, engine parts and the like need to stand 600-1000 ℃ or even higher temperature for a long time, and meanwhile, in a high temperature gap, and possibly in a high humidity and high salinity environment, the high temperature boiler is subjected to double damage of high temperature and corrosion, and the comprehensive performance of the high temperature anticorrosive coating plays a crucial role in the service life of the whole equipment. For example, Chinese patent application CN103614071B discloses an organosilicon anti-corrosive paint for the outer wall of a pipeline, which can resist high temperature of 800 ℃ and a preparation method thereof, wherein the organosilicon anti-corrosive paint selects methyl phenyl silicone resin containing hydroxyl as a resin base material, solves the problem of insufficient protection caused by decomposition of the organosilicon paint at high temperature by utilizing the melting characteristic of low-melting-point glass frit at high temperature, and simultaneously has the high temperature resistance of 850 ℃ level, salt spray resistance of 1000h and ultraviolet artificial aging resistance of 1000 h. For another example, chinese patent application CN103113768A discloses a high temperature resistant coating for engine exhaust system, which uses silica sol or alumina sol as a base material to form a coating formulation technology, and can resist high temperature of 800 ℃ for 240h for long-term baking, and also resist 240h neutral salt spray and 72h damp-heat corrosion. The two have the common disadvantages that: the formed coating material has two independent performances of high temperature resistance and corrosion resistance, and can not combine two core performances, namely the coating material does not have the capacity of high temperature resistance and corrosion cycle effect.
Disclosure of Invention
The purpose of the invention is: a high-temperature anticorrosion aluminum sacrificial paint formula, a preparation method and a use method thereof are provided, so that the high-temperature resistance and corrosion cycle dual-function capability of a coated substrate is improved, and the service life is prolonged.
The technical scheme of the invention is as follows:
the high temperature anticorrosive sacrificial aluminum paint consists of phosphate prepolymer 35-45 wt%, corrosion inhibitor 3-5 wt%, assistant 1-3 wt%, spherical aluminum powder 25-35 wt%, glass powder 5-10 wt% and water for the rest.
The corrosion inhibitor adopts one of zinc nitroisophthalate, zinc phosphomolybdate and aluminum tripolyphosphate.
The auxiliary agent is a mixture of a dispersing agent, a polysiloxane antifoaming agent, a polyurethane anti-settling agent and an acrylic acid wetting agent.
The spherical aluminum powder is high-purity aluminum powder prepared by an atomization method.
The grain diameter of the high-purity aluminum powder is 5-15 mu m.
The softening point of the glass powder is 300-400 ℃.
The grain diameter of the glass powder is 20-40 μm.
The method comprises the following steps:
1) preparation of phosphate prepolymer: respectively weighing analytically pure phosphoric acid, phosphorus pentoxide, phosphate and magnesium oxide according to the mass ratio of (50-55) to (5-6) to (10-15) to (20-30), adding the phosphorus pentoxide into the analytically pure phosphoric acid, carrying out condensation reflux reaction at 120-140 ℃ until the mixture is clear and transparent, slowly adding the phosphate, reducing the temperature to 80-100 ℃ after reacting for a period of time, finally adding the magnesium oxide, carrying out condensation reflux reaction until no precipitate exists, and cooling to obtain a phosphate prepolymer;
2) preparing materials: respectively weighing the phosphate prepolymer, the corrosion inhibitor, the assistant, the spherical aluminum powder and the glass powder according to the weight proportion of the phosphate prepolymer, the corrosion inhibitor, the assistant, the spherical aluminum powder and the glass powder in the mixture of claim 1;
3) grinding: adding a corrosion inhibitor, an auxiliary agent, glass powder and water into the phosphate prepolymer, then putting the mixture into a sand mill for grinding until the fineness is lower than 20 mu m, and discharging the mixture to obtain a ground dispersion;
4) paint mixing: slowly adding spherical aluminum powder into the grinding dispersion under the stirring state of 1500-2000 rpm, stirring until the fineness is lower than 20 mu m, and discharging to obtain the high-temperature anticorrosive aluminum sacrificial coating.
The phosphate is one of dodecyl phosphate, octadecyl phosphate, octyl phenol polyoxyethylene ether phosphate and 2-ethylhexyl phosphate.
The invention has the advantages that: the formula, the preparation method and the use method of the high-temperature anti-corrosion aluminum sacrificial coating are provided, the high-temperature-corrosion resistance cycle performance is greatly improved on the basis of high-temperature resistance and corrosion resistance, and the reliability of a high-temperature running matrix is more effectively ensured.
Detailed Description
The working principle of the invention is as follows: aluminum is added into a coating formula as a cathode protection sacrificial material, the coating is stabilized through surface state control, and a high-performance temperature-resistant coating material capable of repeatedly resisting high temperature and corrosion is formed by utilizing the high-temperature resistance characteristic of a polyphosphoric acid binder system.
The high temperature anticorrosive sacrificial aluminum paint consists of phosphate prepolymer 35-45 wt%, corrosion inhibitor 3-5 wt%, assistant 1-3 wt%, spherical aluminum powder 25-35 wt%, glass powder 5-10 wt% and water for the rest.
The corrosion inhibitor adopts one of zinc nitroisophthalate, zinc phosphomolybdate and aluminum tripolyphosphate.
The auxiliary agent is a mixture of a dispersing agent, a polysiloxane antifoaming agent, a polyurethane anti-settling agent and an acrylic acid wetting agent.
The spherical aluminum powder is high-purity aluminum powder prepared by an atomization method.
The grain diameter of the high-purity aluminum powder is 5-15 mu m.
The softening point of the glass powder is 300-400 ℃.
The grain diameter of the glass powder is 20-40 μm.
The method comprises the following steps:
1) preparation of phosphate prepolymer: respectively weighing analytically pure phosphoric acid, phosphorus pentoxide, phosphate and magnesium oxide according to the mass ratio of (50-55) to (5-6) to (10-15) to (20-30), adding the phosphorus pentoxide into the analytically pure phosphoric acid, carrying out condensation reflux reaction at 120-140 ℃ until the mixture is clear and transparent, slowly adding the phosphate, reducing the temperature to 80-100 ℃ after reacting for a period of time, finally adding the magnesium oxide, carrying out condensation reflux reaction until no precipitate exists, and cooling to obtain a phosphate prepolymer;
2) preparing materials: respectively weighing the phosphate prepolymer, the corrosion inhibitor, the assistant, the spherical aluminum powder and the glass powder according to the weight proportion of the phosphate prepolymer, the corrosion inhibitor, the assistant, the spherical aluminum powder and the glass powder in the mixture of claim 1;
3) grinding: adding a corrosion inhibitor, an auxiliary agent, glass powder and water into the phosphate prepolymer, then putting the mixture into a sand mill for grinding until the fineness is lower than 20 mu m, and discharging the mixture to obtain a ground dispersion;
4) paint mixing: slowly adding spherical aluminum powder into the grinding dispersion under the stirring state of 1500-2000 rpm, stirring until the fineness is lower than 20 mu m, and discharging to obtain the high-temperature anticorrosive aluminum sacrificial coating.
The phosphate is one of dodecyl phosphate, octadecyl phosphate, octyl phenol polyoxyethylene ether phosphate and 2-ethylhexyl phosphate.
The present invention is described in further detail below. The high temperature anticorrosive sacrificial aluminum paint consists of phosphate prepolymer 35-45 wt%, corrosion inhibitor 3-5 wt%, assistant 1-3 wt%, spherical aluminum powder 25-35 wt%, glass powder 5-10 wt% and water for the rest.
The corrosion inhibitor adopts one of zinc nitroisophthalate, zinc phosphomolybdate and aluminum tripolyphosphate.
The auxiliary agent is a mixture of a dispersing agent, a polysiloxane antifoaming agent, a polyurethane anti-settling agent and an acrylic acid wetting agent.
The spherical aluminum powder is high-purity aluminum powder prepared by an atomization method.
The grain diameter of the high-purity aluminum powder is 5-15 mu m.
The softening point of the glass powder is 300-400 ℃.
The grain diameter of the glass powder is 20-40 μm.
The method comprises the following steps:
1) preparation of phosphate prepolymer: respectively weighing analytically pure phosphoric acid, phosphorus pentoxide, phosphate and magnesium oxide according to the mass ratio of (50-55) to (5-6) to (10-15) to (20-30), adding the phosphorus pentoxide into the analytically pure phosphoric acid, carrying out condensation reflux reaction at 120-140 ℃ until the mixture is clear and transparent, slowly adding the phosphate, reducing the temperature to 80-100 ℃ after reacting for a period of time, finally adding the magnesium oxide, carrying out condensation reflux reaction until no precipitate exists, and cooling to obtain a phosphate prepolymer;
2) preparing materials: respectively weighing the phosphate prepolymer, the corrosion inhibitor, the assistant, the spherical aluminum powder and the glass powder according to the weight proportion of the phosphate prepolymer, the corrosion inhibitor, the assistant, the spherical aluminum powder and the glass powder in the mixture of claim 1;
3) grinding: adding a corrosion inhibitor, an auxiliary agent, glass powder and water into the phosphate prepolymer, then putting the mixture into a sand mill for grinding until the fineness is lower than 20 mu m, and discharging the mixture to obtain a ground dispersion;
4) paint mixing: slowly adding spherical aluminum powder into the grinding dispersion under the stirring state of 1500-2000 rpm, stirring until the fineness is lower than 20 mu m, and discharging to obtain the high-temperature anticorrosive aluminum sacrificial coating.
The phosphate is one of dodecyl phosphate, octadecyl phosphate, octyl phenol polyoxyethylene ether phosphate and 2-ethylhexyl phosphate.
The high-temperature anticorrosive aluminum sacrificial paint comprises the following steps: blowing sand on the surface of a substrate to be coated by using alumina sand, cleaning the surface of the substrate to be coated by using gasoline or acetone, and airing; spraying high-temperature anticorrosion aluminum sacrificial paint to the surface of the substrate by using a spray gun, wherein the coating thickness is 0.01-0.1 mm, and placing the coated high-temperature anticorrosion aluminum sacrificial paint at 280-350 ℃ for 1-3 h to be completely cured for use.
Example 1
1. Preparation of phosphate prepolymer: 50g of analytically pure phosphoric acid, 5g of phosphorus pentoxide, 10g of dodecyl phosphate and 20g of magnesium oxide were weighed out. Adding analytically pure phosphoric acid into phosphorus pentoxide, carrying out a condensation reflux reaction at 120 ℃ until the phosphorus pentoxide is clear and transparent, slowly adding dodecyl phosphate, reacting for 8 hours, cooling the temperature to 80 ℃, finally adding magnesium oxide, carrying out a condensation reflux reaction until no precipitate exists, and cooling to obtain a phosphate prepolymer;
2. preparing materials: 35g of phosphate prepolymer, 3g of zinc nitroisophthalate, 0.2g of dispersant, 0.3g of defoamer, 0.3g of anti-settling agent, 0.2g of wetting agent, 25g of high-purity aluminum powder with the particle size of 5 microns, 5g of glass powder with the particle size of 20 microns and 31g of water are weighed.
3. Grinding: adding zinc nitroisophthalate, a dispersing agent, a defoaming agent, an anti-settling agent, a wetting agent, glass powder and water into the phosphate prepolymer, then putting the mixture into a sand mill for grinding until the fineness is lower than 20 mu m, and discharging the mixture to obtain a ground dispersion;
4. paint mixing: slowly adding high-purity aluminum powder into the grinding dispersion under the stirring state of 1500rpm, stirring until the fineness is lower than 20 mu m, and discharging to obtain the high-temperature anticorrosive aluminum sacrificial coating.
The high-temperature anticorrosive aluminum sacrificial paint comprises the following steps: blowing sand on the surface of a substrate to be coated by using 120-mesh alumina sand, cleaning the surface of the substrate to be coated by using gasoline or acetone, and airing; spraying high-temperature anticorrosion aluminum sacrificial paint to the surface of the substrate by using a spray gun, wherein the coating thickness is 0.01mm, and completely curing the coated high-temperature anticorrosion aluminum sacrificial paint after placing the coating at 280 ℃ for 3 hours.
The coating can endure corrosion cycle examination tests of neutral salt fog (20h) after 600 ℃ (4h) for more than 20 cycle cycles, has excellent performance, and can be widely applied to matrix protection of high-temperature equipment.
Example 2
1. Preparation of phosphate prepolymer: 55g of analytically pure phosphoric acid, 6g of phosphorus pentoxide, 13g of octylphenol polyoxyethylene ether phosphate and 30g of magnesium oxide are weighed. Adding analytically pure phosphoric acid into phosphorus pentoxide, performing a condensation reflux reaction at 140 ℃ until the mixture is clear and transparent, slowly adding octyl phenol polyoxyethylene ether phosphate, reacting for 12 hours, cooling the temperature to 100 ℃, finally adding magnesium oxide, performing a condensation reflux reaction until no precipitate exists, and cooling to obtain a phosphate prepolymer;
2. preparing materials: 45g of phosphate prepolymer, 5g of aluminum tripolyphosphate, 1.2g of dispersant, 0.4g of defoamer, 0.5g of anti-settling agent, 0.9g of wetting agent, 35g of high-purity aluminum powder with the particle size of 15 microns, 10g of glass powder with the particle size of 30 microns and 2g of water are weighed.
3. Grinding: adding aluminum tripolyphosphate, a dispersing agent, a defoaming agent, an anti-settling agent, a wetting agent, glass powder and water into the phosphate prepolymer, then putting the mixture into a sand mill for grinding until the fineness is lower than 20 mu m, and discharging to obtain a ground dispersion;
4. paint mixing: slowly adding high-purity aluminum powder into the grinding dispersion in the stirring state of 2000rpm, stirring until the fineness is lower than 20 mu m, and discharging to obtain the high-temperature anticorrosive aluminum sacrificial coating.
The high-temperature anticorrosive aluminum sacrificial paint comprises the following steps: blowing sand on the surface of a substrate to be coated by using alumina sand of 400 meshes, cleaning the surface of the substrate to be coated by using gasoline or acetone, and airing; spraying high-temperature anticorrosion aluminum sacrificial paint to the surface of the substrate by using a spray gun, wherein the coating thickness is 0.05mm, and placing the coated high-temperature anticorrosion aluminum sacrificial paint at 350 ℃ for 1h to completely cure.
The coating can endure corrosion cycle examination tests of neutral salt fog (20h) after 800 ℃ (4h) for more than 20 cycle cycles, has excellent performance, and can be widely applied to matrix protection of high-temperature equipment.
Example 3
1. Preparation of phosphate prepolymer: 52g of analytically pure phosphoric acid, 6g of phosphorus pentoxide, 15g of 2-ethylhexyl phosphate and 25g of magnesium oxide were weighed out. Adding analytically pure phosphoric acid into phosphorus pentoxide, performing a condensation reflux reaction at 140 ℃ until the phosphorus pentoxide is clear and transparent, slowly adding 2-ethylhexyl phosphate, reacting for 10 hours, cooling the temperature to 85 ℃, finally adding magnesium oxide, performing a condensation reflux reaction until no precipitate exists, and cooling to obtain a phosphate prepolymer;
2. preparing materials: 40g of phosphate prepolymer, 4g of zinc phosphomolybdate, 1.0g of dispersant, 0.4g of defoamer, 0.5g of anti-settling agent, 0.5g of wetting agent, 30g of high-purity aluminum powder with the particle size of 10 microns, 8g of glass powder with the particle size of 40 microns and 15.6g of water are weighed.
3. Grinding: adding zinc phosphomolybdate, a dispersing agent, a defoaming agent, an anti-settling agent, a wetting agent, glass powder and water into the phosphate prepolymer, then putting the mixture into a sand mill for grinding until the fineness is lower than 20 mu m, and discharging the mixture to obtain a ground dispersion;
4. paint mixing: and slowly adding high-purity aluminum powder into the grinding dispersion in the stirring state of 1600rpm, stirring until the fineness is lower than 20 mu m, and discharging to obtain the high-temperature anticorrosive aluminum sacrificial coating.
The high-temperature anticorrosive aluminum sacrificial paint comprises the following steps: blowing sand on the surface of a substrate to be coated by using 180-mesh alumina sand, cleaning the surface of the substrate to be coated by using gasoline or acetone, and airing; spraying high-temperature anticorrosive aluminum sacrificial paint to the surface of the substrate by using a spray gun, wherein the coating thickness is 0.1 mm; and (3) placing the coated high-temperature anticorrosive aluminum sacrificial coating at 300 ℃ for 2h to be completely cured.
The coating can endure corrosion cycle examination tests of neutral salt fog (20h) after 700 ℃ (4h) for more than 20 cycle cycles, has excellent performance, and can be widely applied to matrix protection of high-temperature equipment.
Example 4
1. Preparation of phosphate prepolymer: 55g of analytically pure phosphoric acid, 5g of phosphorus pentoxide, 14g of octadecyl phosphate and 30g of magnesium oxide were weighed out. Adding analytically pure phosphoric acid into phosphorus pentoxide, performing a condensation reflux reaction at 140 ℃ until the mixture is clear and transparent, slowly adding 2-octadecyl phosphate, reacting for 24 hours, cooling the temperature to 100 ℃, finally adding magnesium oxide, performing a condensation reflux reaction until no precipitate exists, and cooling to obtain a phosphate prepolymer;
2. preparing materials: 43g of phosphate prepolymer, 5g of zinc phosphomolybdate, 0.8g of dispersant, 0.2g of defoamer, 1.2g of anti-settling agent, 0.3g of wetting agent, 33g of high-purity aluminum powder with the particle size of 15 mu m, 5g of glass powder with the particle size of 30 mu m and 11.5g of water are weighed.
3. Grinding: adding zinc phosphomolybdate, a dispersing agent, a defoaming agent, an anti-settling agent, a wetting agent, glass powder and water into the phosphate prepolymer, then putting the mixture into a sand mill for grinding until the fineness is lower than 20 mu m, and discharging the mixture to obtain a ground dispersion;
4. paint mixing: slowly adding high-purity aluminum powder into the grinding dispersion in the stirring state of 2000rpm, stirring until the fineness is lower than 20 mu m, and discharging to obtain the high-temperature anticorrosive aluminum sacrificial coating.
The high-temperature anticorrosive aluminum sacrificial paint comprises the following steps: blowing sand on the surface of a substrate to be coated by using alumina sand of 400 meshes, cleaning the surface of the substrate to be coated by using gasoline or acetone, and airing; spraying high-temperature anticorrosive aluminum sacrificial paint to the surface of the substrate by using a spray gun, wherein the coating thickness is 0.08 mm; and (3) placing the coated high-temperature anticorrosive aluminum sacrificial coating at 340 ℃ for 2h to completely cure.
The coating can endure corrosion cycle examination tests of neutral salt fog (20h) after 600 ℃ (4h) for more than 20 cycle cycles, has excellent performance, and can be widely applied to matrix protection of high-temperature equipment.
Claims (9)
1. The high-temperature anticorrosive aluminum sacrificial coating is characterized by comprising the following components in parts by weight: the corrosion inhibitor is a mixture consisting of phosphate prepolymer, corrosion inhibitor, assistant, spherical aluminum powder, glass powder and water, wherein the phosphate prepolymer accounts for 35-45% of the weight of the mixture, the corrosion inhibitor accounts for 3-5% of the weight of the mixture, the assistant accounts for 1-3% of the weight of the mixture, the spherical aluminum powder accounts for 25-35% of the weight of the mixture, the glass powder accounts for 5-10% of the weight of the mixture, and the balance is water.
2. The sacrificial high temperature corrosion-resistant aluminum coating as claimed in claim 1, wherein the corrosion inhibitor is one of zinc nitroisophthalate, zinc phosphomolybdate and aluminum tripolyphosphate.
3. A high temperature corrosion resistant aluminum sacrificial coating as claimed in claim 1, wherein said adjuvant is a mixture of dispersant, polysiloxane defoamer, polyurethane anti-settling agent and acrylic wetting agent.
4. The sacrificial high-temperature anticorrosive aluminum coating as claimed in claim 1, wherein the spherical aluminum powder is high-purity aluminum powder prepared by an atomization method.
5. The sacrificial high-temperature anticorrosive aluminum paint as claimed in claim 4, wherein the high-purity aluminum powder has a particle size of 5-15 μm.
6. A high temperature corrosion resistant aluminum sacrificial coating as claimed in claim 1, wherein the softening point of the glass frit is 300 ℃ to 400 ℃.
7. A high-temperature anti-corrosion aluminum sacrificial coating as claimed in claim 6, wherein the particle size of the glass powder is 20 μm to 40 μm.
8. The preparation method of the high-temperature anticorrosive aluminum sacrificial coating as claimed in claim 1, wherein the method comprises the following steps:
1) preparation of phosphate prepolymer: respectively weighing analytically pure phosphoric acid, phosphorus pentoxide, phosphate and magnesium oxide according to the mass ratio of (50-55) to (5-6) to (10-15) to (20-30), adding the phosphorus pentoxide into the analytically pure phosphoric acid, carrying out condensation reflux reaction at 120-140 ℃ until the mixture is clear and transparent, slowly adding the phosphate, reducing the temperature to 80-100 ℃ after reacting for a period of time, finally adding the magnesium oxide, carrying out condensation reflux reaction until no precipitate exists, and cooling to obtain a phosphate prepolymer;
2) preparing materials: respectively weighing the phosphate prepolymer, the corrosion inhibitor, the assistant, the spherical aluminum powder and the glass powder according to the weight proportion of the phosphate prepolymer, the corrosion inhibitor, the assistant, the spherical aluminum powder and the glass powder in the mixture of claim 1;
3) grinding: adding a corrosion inhibitor, an auxiliary agent, glass powder and water into the phosphate prepolymer, then putting the mixture into a sand mill for grinding until the fineness is lower than 20 mu m, and discharging the mixture to obtain a ground dispersion;
4) paint mixing: slowly adding spherical aluminum powder into the grinding dispersion under the stirring state of 1500-2000 rpm, stirring until the fineness is lower than 20 mu m, and discharging to obtain the high-temperature anticorrosive aluminum sacrificial coating.
9. The method for preparing a high-temperature anticorrosive aluminum sacrificial coating as claimed in claim 8, wherein the phosphate is one of dodecyl phosphate, octadecyl phosphate, octyl phenol polyoxyethylene ether phosphate and 2-ethylhexyl phosphate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111167888.4A CN114149743A (en) | 2021-09-30 | 2021-09-30 | High-temperature anti-corrosion aluminum sacrificial coating and preparation method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111167888.4A CN114149743A (en) | 2021-09-30 | 2021-09-30 | High-temperature anti-corrosion aluminum sacrificial coating and preparation method thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN114149743A true CN114149743A (en) | 2022-03-08 |
Family
ID=80462827
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111167888.4A Pending CN114149743A (en) | 2021-09-30 | 2021-09-30 | High-temperature anti-corrosion aluminum sacrificial coating and preparation method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN114149743A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115725235A (en) * | 2022-09-16 | 2023-03-03 | 中国航发北京航空材料研究院 | Nontoxic high-temperature-resistant anticorrosive paint and preparation method thereof |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1210874A (en) * | 1997-09-09 | 1999-03-17 | 赵全玺 | Inorganic coating |
| CN1232060A (en) * | 1998-04-13 | 1999-10-20 | 赵全玺 | Inorganic phosphate paint |
| CN1259553A (en) * | 1999-01-05 | 2000-07-12 | 赵鸿 | Protective coating |
| CN104387964A (en) * | 2014-12-04 | 2015-03-04 | 江苏科技大学 | Coating with high-temperature resistance and salt fog resistance for engine exhaust pipe and preparation method of coating |
-
2021
- 2021-09-30 CN CN202111167888.4A patent/CN114149743A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1210874A (en) * | 1997-09-09 | 1999-03-17 | 赵全玺 | Inorganic coating |
| CN1232060A (en) * | 1998-04-13 | 1999-10-20 | 赵全玺 | Inorganic phosphate paint |
| CN1259553A (en) * | 1999-01-05 | 2000-07-12 | 赵鸿 | Protective coating |
| CN104387964A (en) * | 2014-12-04 | 2015-03-04 | 江苏科技大学 | Coating with high-temperature resistance and salt fog resistance for engine exhaust pipe and preparation method of coating |
Non-Patent Citations (1)
| Title |
|---|
| 肖千云等: "《船舰腐蚀与防护技术》", 30 September 2019, 哈尔滨工业大学出版社 * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115725235A (en) * | 2022-09-16 | 2023-03-03 | 中国航发北京航空材料研究院 | Nontoxic high-temperature-resistant anticorrosive paint and preparation method thereof |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103351787B (en) | A kind of mechanized equipment low prepared surface high-performance anti-corrosive primer and preparation method | |
| CN114181616B (en) | Chromium-free low-temperature curing water-based zinc-aluminum coating and preparation method and application thereof | |
| CN110144160A (en) | A kind of high solid low surface treatment epoxy zinc rich primer and the preparation method and application thereof | |
| CN108624196A (en) | Water-base epoxy shop primer and preparation method thereof | |
| CN102993899B (en) | A kind of salt spray resistance metal anti-corrosion paint and preparation method thereof | |
| CN114410221B (en) | Preparation method of low-temperature curing environment-friendly water-based chromium-free zinc-aluminum coating | |
| CN110054917B (en) | Inorganic heat-insulating coating composition and inorganic heat-insulating coating | |
| CN114149743A (en) | High-temperature anti-corrosion aluminum sacrificial coating and preparation method thereof | |
| CN104725969B (en) | Water-based anti-corrosion floating type aluminium powder paint and preparation method thereof | |
| CN113698846A (en) | Hyperbranched epoxy zinc-rich coating and preparation method thereof | |
| CN103214655B (en) | Modified epoxy resin and high-solid anticorrosive coating prepared therewith | |
| CN115710444A (en) | Water-based acrylic acid antirust paint and preparation method thereof | |
| CN111393930A (en) | Weather-resistant temperature-sensing early-warning cable fireproof coating | |
| CN108101015B (en) | High-entropy phosphate, high-temperature binder, and preparation methods and applications thereof | |
| CN103450772A (en) | Organic silicon modified epoxy acrylic acid high anticorrosion heat insulation paint and production method thereof | |
| CN112143268B (en) | Preparation of phosphate bonded polytetrafluoroethylene coating and coating | |
| CN107216696B (en) | A kind of waterborne inorganic einc-rich primer and preparation method thereof | |
| CN102190940A (en) | High-temperature-resistant corrosion-resistant coating for engineering machinery tail gas pipe | |
| CN109370397A (en) | A kind of nano hybridization ceramic resin coating and the preparation method and application thereof | |
| CN115260801A (en) | Graphite-based high-temperature lubricating coating, preparation method thereof and lubricating coating | |
| CN102260423B (en) | Alcohol-soluble phosphate high temperature resistant long-acting anti-corrosive paint and preparation method thereof | |
| CN108864848A (en) | A kind of intelligent distribution box | |
| CN114716851B (en) | High-temperature-resistant anti-yellowing non-staining metal and preparation method and application thereof | |
| CN111138929B (en) | Nano composite graphene coating and preparation method thereof | |
| CN114773928A (en) | Water-based paint for color-coated aluminum coils 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 | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20220308 |
|
| RJ01 | Rejection of invention patent application after publication |