CN112280040A - Novel green environment-friendly high-corrosion-resistance zinc-aluminum coating - Google Patents
Novel green environment-friendly high-corrosion-resistance zinc-aluminum coating Download PDFInfo
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- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G77/00—Macromolecular compounds obtained by reactions forming a linkage containing silicon with or without sulfur, nitrogen, oxygen or carbon in the main chain of the macromolecule
- C08G77/04—Polysiloxanes
- C08G77/22—Polysiloxanes containing silicon bound to organic groups containing atoms other than carbon, hydrogen and oxygen
- C08G77/26—Polysiloxanes containing silicon bound to organic groups containing atoms other than carbon, hydrogen and oxygen nitrogen-containing groups
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- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G77/00—Macromolecular compounds obtained by reactions forming a linkage containing silicon with or without sulfur, nitrogen, oxygen or carbon in the main chain of the macromolecule
- C08G77/04—Polysiloxanes
- C08G77/14—Polysiloxanes containing silicon bound to oxygen-containing groups
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- 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
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- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/34—Silicon-containing compounds
- C08K3/36—Silica
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- 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
- C09D183/00—Coating compositions based on macromolecular compounds obtained by reactions forming in the main chain of the macromolecule a linkage containing silicon, with or without sulfur, nitrogen, oxygen, or carbon only; Coating compositions based on derivatives of such polymers
- C09D183/04—Polysiloxanes
- C09D183/06—Polysiloxanes containing silicon bound to oxygen-containing groups
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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
- C09D183/00—Coating compositions based on macromolecular compounds obtained by reactions forming in the main chain of the macromolecule a linkage containing silicon, with or without sulfur, nitrogen, oxygen, or carbon only; Coating compositions based on derivatives of such polymers
- C09D183/04—Polysiloxanes
- C09D183/08—Polysiloxanes containing silicon bound to organic groups containing atoms other than carbon, hydrogen, and oxygen
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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
- 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
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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
- 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
- C09D5/106—Anti-corrosive paints containing metal dust containing Zn
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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
- C09D7/60—Additives non-macromolecular
- C09D7/61—Additives non-macromolecular inorganic
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- 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
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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
- C08K3/02—Elements
- C08K3/08—Metals
- C08K2003/0893—Zinc
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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
- C08K2003/2237—Oxides; Hydroxides of metals of titanium
- C08K2003/2241—Titanium dioxide
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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
- C08K2201/00—Specific properties of additives
- C08K2201/011—Nanostructured additives
Abstract
The invention provides a preparation method of green environment-friendly resin and a green environment-friendly high-corrosion-resistance zinc-aluminum coating prepared by taking the green environment-friendly resin as a raw material, wherein the green environment-friendly resin is prepared by taking silane coupling agent and nano sol as raw materials, mixing the silane coupling agent and the nano sol, hydrolyzing the mixture with acid liquor with the mass of 0.3-1 time of the solution, and adding high-boiling-point alcohols, zinc powder and aluminum powder into the mixture. The environment-friendly high-corrosion-resistance zinc-aluminum coating is not added with toxic and harmful substances such as chromic acid and the like, and is environment-friendly; the paint has strong adhesive force, impact resistance, high hardness and excellent salt spray resistance; solves the problems of high price, unstable quality, short effective period, strict requirements on storage and management, pungent smell of the coating, high solvent volatilization, low hardness and the like of the conventional zinc-aluminum coating.
Description
Technical Field
The invention is applied to the technical field of coatings, and particularly relates to a novel environment-friendly high-corrosion-resistance zinc-aluminum coating.
Background
With the continuous progress of material culture, the quality requirement of people on the living environment is higher and higher. Protecting and improving ecological environment, realizing sustainable development of economic society, and becoming an important value orientation for most countries to draw up development strategy of the new century. In 6 months 1999, europe passed a regulatory regulation concerning scrapped cars and their accessories. This regulation, entitled "End of Life Vehicle Directive (EOLVD)," has formally been in force in 2006. Regulations 4.2 and 6.3 restrict the use of harmful substances such as lead, mercury, cadmium and hexavalent chromium, and specify the chromium (Cr) of each car6+) The content is not more than 2 g. The emergence of the regulation puts higher environmental protection requirements on the surface treatment of automobile parts, and all automobile manufacturers in the world adopt new chromium-free coating standards. A batch of chromium-free zinc-aluminum anticorrosive coatings such as Geomet, Delta MKS, Magni, Zintek and the like are produced one after another, and the chromium-free zinc-aluminum anticorrosive technology becomes a new development direction of Dacromet industry.
At present, zinc-aluminum coatings in high-end markets of China are all imported foreign products, the technology of the zinc-aluminum coatings at home is relatively lagged behind, and the zinc-aluminum coatings at present at home and abroad have the problems of high price, unstable quality, short effective period, strict requirements on storage and management, pungent smell of coatings, high solvent volatilization, low hardness and the like.
Disclosure of Invention
Aiming at the problems in the prior art, the invention provides a novel green environment-friendly high-corrosion-resistance zinc-aluminum coating with low price and excellent performance.
The technical problem to be solved by the invention is realized by adopting the following technical scheme:
a green environment-friendly resin is prepared by the following steps: mixing and stirring two or three silane coupling agents and the nano sol, hydrolyzing with acid liquor with the mass of 0.3-1 time of that of the solution, heating to distill out the generated methanol or ethanol, and adding alkali liquor to adjust the pH value of the solution to be neutral after the distillation is finished, thereby obtaining the green environment-friendly resin.
Further, the silane coupling agent is two or three of KH550, methyl trimethoxy silane, KH560, formyl trimethoxy silane and tetraethoxysilane.
Further, the nano sol is nano silicon dioxide, nano titanium dioxide or nano zirconium dioxide.
Further, the mass ratio of the two silane coupling agents to the nano sol is 1-8: 1-4: 5-1.
Further, the mass ratio of the three silane coupling agents to the nano sol is 2-6: 1-4: 1-6: 5-1:
further, the acid solution is an aqueous solution prepared from 1-20% of acetic acid, oxalic acid, phosphoric acid or citric acid.
The green environment-friendly high-corrosion-resistance zinc-aluminum coating based on the green environment-friendly resin prepared by the preparation method comprises the following raw materials: high boiling point alcohols, zinc powder, aluminum powder and green environment-friendly resin.
Further, the green environment-friendly high-corrosion-resistance zinc-aluminum coating comprises the following raw materials in parts by weight:
further, the zinc-aluminum coating further comprises 10-50 parts by weight of carbon black and/or 10-50 parts by weight of mica powder.
The preparation method of the green environment-friendly high-corrosion-resistance zinc-aluminum coating comprises the following steps:
1) adding zinc powder and aluminum powder into high-boiling-point alcohols, stirring, wetting and soaking for 12 hours to obtain zinc-aluminum paste;
2) and (2) weighing the zinc-aluminum slurry obtained in the step 1) under stirring, slowly pouring the zinc-aluminum slurry into the environment-friendly resin, and filtering to obtain the zinc-aluminum coating after the zinc-aluminum slurry is uniformly dispersed.
Further, adding zinc powder, aluminum powder, carbon black and/or mica powder into the high-boiling-point alcohols, stirring, wetting and soaking for 12 hours to obtain zinc-aluminum paste.
Further, the high boiling point alcohol is propylene glycol, isoamyl alcohol, benzyl alcohol, cycloethanol or diethylene glycol.
The application of the zinc-aluminum coating prepared by the method in corrosion prevention of iron metal base plates and parts.
Furthermore, the curing temperature of the zinc-aluminum coating in the anticorrosion application is 260-280 ℃ for 30 min.
Further, the thickness of the zinc-aluminum coating single-layer film is 10 μm.
Compared with the prior art, the invention has the beneficial effects that:
(1) the novel green environment-friendly high-corrosion-resistance zinc-aluminum coating is not added with toxic and harmful substances such as chromic acid and the like, and is green and environment-friendly; the paint has the advantages of strong adhesive force, impact resistance, high hardness, excellent salt spray resistance, 10 mu m of single-layer film thickness and more than 1200h of neutral salt spray.
(2) Compared with imported products, the novel environment-friendly high-corrosion-resistance zinc-aluminum coating has excellent performance and low price; the zinc-aluminum coating can be stored for a long time, and can not be coked and solidified, so that the problem that the zinc-aluminum coating paint on the market can not be stored for a long time is solved.
Drawings
FIG. 1 is a sample diagram of a novel green environment-friendly high-corrosion-resistance zinc-aluminum coating of the invention, wherein the sample 3 of example 6 is subjected to an impact test and a lattice test.
FIG. 2 is a graph of a sample 4 of example 6 in a novel green environment-friendly high-corrosion-resistance zinc-aluminum coating after 1200 hours of neutral salt spray.
FIG. 3 is an enlarged view of sample 3 of example 6 under a microscope of 1/16 times in the novel environment-friendly high-corrosion-resistance zinc-aluminum coating of the invention.
Detailed Description
The technical solution of the present invention is further described in detail with reference to the following specific examples. It is to be understood that the following examples are only illustrative and explanatory of the present invention and should not be construed as limiting the scope of the present invention. All the technologies realized based on the above-mentioned contents of the present invention are covered in the protection scope of the present invention.
In addition, unless otherwise specifically indicated, various starting materials, reagents, instruments and equipment used in the present invention may be commercially available or prepared by existing methods.
A green environment-friendly resin is prepared by the following steps: mixing and stirring two or three silane coupling agents and the nano sol, hydrolyzing with acid liquor with the mass of 0.3-1 time of that of the solution, heating to distill out the generated methanol or ethanol, and adding alkali liquor to adjust the pH value of the solution to be neutral after the distillation is finished, thereby obtaining the green environment-friendly resin. Methanol or ethanol is a byproduct generated by hydrolysis and is removed by distillation at elevated temperature.
The performance characteristics of the green and environment-friendly resin of the invention are shown in Table 1.
TABLE 1 Green environmental protection resin Performance index
| Appearance of the product | Colorless transparent liquid |
| Specific gravity of | 1.12-1.14 |
| Viscosity (25 ℃ C.) mPas | 60-70 |
| Mass solid content | 55-72% (plus-minus 0.5%) |
| Flash point | Is free of |
| Water resistance | Is excellent in |
| Oil resistance | Is excellent in |
| Heat resistance | Is excellent in |
| Shelf life | 1 year |
A preparation method of a green environment-friendly high-corrosion-resistance zinc-aluminum coating comprises the following steps:
1) adding zinc-aluminum powder into high boiling point alcohols, stirring, wetting and soaking for 12h to obtain zinc-aluminum paste;
2) and (2) weighing the zinc-aluminum slurry obtained in the step 1) under stirring, slowly pouring the zinc-aluminum slurry into the environment-friendly resin, and filtering to obtain the zinc-aluminum coating after the zinc-aluminum slurry is uniformly dispersed.
Example 1: preparation method of green environment-friendly resin
A green environment-friendly resin is prepared by the following steps: mixing and stirring KH 5501 parts by weight, 4 parts by weight of methyltrimethoxysilane and 5 parts by weight of nano titanium dioxide sol, hydrolyzing with acid liquor with the mass of 0.9 time of the solution, heating to distill out generated methanol/ethanol, and adding alkali liquor to adjust the pH value of the solution to be neutral after the distillation is finished, thereby obtaining the green environment-friendly resin.
Example 2: preparation method of green environment-friendly resin
A green environment-friendly resin is prepared by the following steps: mixing and stirring KH 5502 parts by weight, KH 5603 parts by weight, 4 parts by weight of ethyl orthosilicate and 5 parts by weight of nano-silica sol, hydrolyzing with acid liquor with the mass of 0.8 time that of the solution, heating to distill out generated methanol/ethanol, and adding alkali liquor to adjust the pH value of the solution to be neutral after the distillation is finished, thereby obtaining the environment-friendly resin.
Example 3: preparation method of green environment-friendly resin
A green environment-friendly resin is prepared by the following steps: mixing 8 parts by weight of methyltrimethoxysilane, 2 parts by weight of KH 5601 parts by weight of nano silica sol, stirring, hydrolyzing with acid liquor with the mass of 0.3 time that of the solution, heating to distill out generated methanol/ethanol, and adding alkali liquor to adjust the pH value of the solution to be neutral after the distillation is finished, thereby obtaining the green environment-friendly resin.
Example 4: preparation method of green environment-friendly resin
A green environment-friendly resin is prepared by the following steps: mixing and stirring KH 5504 parts by weight, 2 parts by weight of methyltrimethoxysilane and KH 5603 parts by weight with 3 parts by weight of nano zirconium dioxide sol, hydrolyzing with acid liquor 0.4 times of the solution by weight, heating to distill out the generated methanol/ethanol, and adding alkali liquor to adjust the pH value of the solution to be neutral after the distillation is finished, thereby obtaining the environment-friendly resin.
Example 5: preparation method of green environment-friendly resin
A green environment-friendly resin is prepared by the following steps: mixing and stirring KH 5504 parts by weight, 2 parts by weight of ethyl orthosilicate and 3 parts by weight of nano titanium dioxide sol, hydrolyzing with acid liquor with the mass of 0.6 time that of the solution, heating to distill out generated methanol/ethanol, and adding alkali liquor to adjust the pH value of the solution to be neutral after the distillation is finished, thereby obtaining the green environment-friendly resin.
The properties of the green environmental protection resins prepared in examples 1-5 are shown in Table 2.
TABLE 2 measured values of the properties of green and environmentally friendly resins
Example 6: preparation method of green environment-friendly high-corrosion-resistance zinc-aluminum coating
The green environment-friendly high-corrosion-resistance zinc-aluminum coating is prepared by using the green environment-friendly resin prepared in the example 4 as a raw material, and samples 1 to 5 are obtained respectively. The preparation method of the green environment-friendly high-corrosion-resistance zinc-aluminum coating comprises the following steps:
1) weighing the raw materials according to the proportion in the table 3, adding zinc powder, aluminum powder, carbon black and/or mica powder into high-boiling-point alcohols, stirring, wetting and soaking for 12 hours to obtain zinc-aluminum paste;
2) and (2) weighing the zinc-aluminum slurry obtained in the step 1) under stirring, slowly pouring the zinc-aluminum slurry into weighed green environment-friendly resin, and filtering to obtain the zinc-aluminum coating after uniform dispersion.
The raw material ratios of the green environment-friendly high-corrosion-resistance zinc-aluminum coatings of samples 1 to 5 are shown in table 3.
TABLE 3 raw material ratio (unit: g) of green environmental protection high anticorrosion zinc-aluminium coating
| Raw materials | Sample 1 | Sample 2 | Sample 3 | Sample No. 4 | Sample No. 5 |
| Green environment-friendly resin | 400 | 380 | 320 | 340 | 360 |
| Alcohols with high boiling points | 172 | 180 | 189 | 207 | 216 |
| Zinc powder | 390 | 400 | 410 | 430 | 440 |
| Aluminum powder | 38 | 40 | 41 | 43 | 44 |
| Carbon black | 10 | 0 | 30 | 0 | 0 |
| Mica powder | 40 | 30 | 0 | 0 | 0 |
After an iron sheet or a metal part is polished by 800-mesh sand paper until the surface is rough, the zinc-aluminum coating of the sample 1 to the sample 5 prepared in the embodiment 6 is dip-coated or spray-coated, cured for 30min at 260-280 ℃, and then the performance of the zinc-aluminum coating is tested. The test results are shown in Table 4.
TABLE 4 measured values of the performance test of the green environmental protection high corrosion-resistant zinc-aluminum coating
Referring to the attached drawings 1-3 and table 4, the detection results show that the green environment-friendly high-corrosion-resistance zinc-aluminum coating has excellent salt fog resistance, when the zinc powder and the aluminum powder are matched, the thickness of a single-layer film is 10 micrometers, and the neutral salt fog can reach over 1200 h; the hardness is high and can reach more than 4H; the adhesive force is good; the impact resistance is excellent, and the grid test can reach 0 grade. The green environment-friendly resin is matched with zinc powder and aluminum powder for use, and can provide long-acting protection for parts. The alloy powder particles can be observed to be uniformly distributed in the surface coating by observing the microscopic distribution and arrangement mode under the condition of 1/16 times of magnification under a common optical microscope, the appearance is bright and smooth, and the alloy powder particles have good shielding effect on water and air.
The above description is only a preferred embodiment of the present invention, and the protection scope of the present invention is not limited to the above-described embodiments. It will be understood by those skilled in the art that various changes, substitutions of equivalents, and alterations can be made without departing from the spirit and scope of the invention.
Claims (10)
1. The preparation method of the green environment-friendly resin is characterized by comprising the following steps of: mixing and stirring two or three silane coupling agents and the nano sol, hydrolyzing with acid liquor with the mass of 0.3-1 time of that of the solution, heating to distill out the generated methanol or ethanol, and adding alkali liquor to adjust the pH value of the solution to be neutral after the distillation is finished, thereby obtaining the green environment-friendly resin.
2. The method for preparing green environmental protection resin according to claim 1, wherein the method comprises the following steps: the silane coupling agent is two or three of KH550, methyl trimethoxy silane, KH560, formyl trimethoxy silane and tetraethoxysilane.
3. The method for preparing green environmental protection resin according to claim 1, wherein the method comprises the following steps: the nano sol is nano silicon dioxide, nano titanium dioxide or nano zirconium dioxide.
4. The method for preparing green environmental protection resin according to claim 2, wherein: the mass ratio of the two silane coupling agents to the nano sol is 1-8: 1-4: 5-1.
5. The method for preparing green environmental protection resin according to claim 2, wherein: the mass ratio of the three silane coupling agents to the nano sol is 2-6: 1-4: 1-6: 5-1.
6. A green environment-friendly high-corrosion-resistance zinc-aluminum coating based on the green environment-friendly resin obtained by the preparation method of any one of claims 1 to 5 is characterized by comprising the following raw materials: high boiling point alcohols, zinc powder, aluminum powder and green environment-friendly resin.
7. The green environment-friendly high-corrosion-resistance zinc-aluminum coating as claimed in claim 6, wherein: the zinc-aluminum coating also comprises carbon black and/or mica powder.
8. A preparation method of the green environment-friendly high-corrosion-resistance zinc-aluminum coating according to any one of claims 6 to 7, which is characterized by comprising the following steps of:
1) adding zinc powder and aluminum powder into high-boiling-point alcohols, stirring, wetting and soaking for 12 hours to obtain zinc-aluminum paste;
2) and (2) weighing the zinc-aluminum slurry obtained in the step 1) under stirring, slowly pouring the zinc-aluminum slurry into the environment-friendly resin, and filtering to obtain the zinc-aluminum coating after the zinc-aluminum slurry is uniformly dispersed.
9. The application of the zinc-aluminum coating prepared by the preparation method of the green environment-friendly high-corrosion-resistance zinc-aluminum coating according to claim 8 in corrosion resistance of iron metal base plates and parts.
10. The application of the green environment-friendly high-corrosion-resistance zinc-aluminum coating as claimed in claim 9, is characterized in that: the curing temperature of the zinc-aluminum coating in the anticorrosion application is 260-280 ℃ for 30 min.
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| FR3130854A1 (en) | 2021-12-21 | 2023-06-23 | Nof Metal Coatings Europe | ANTI-CORROSION COATING |
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| WO2023118042A1 (en) | 2021-12-21 | 2023-06-29 | Nof Metal Coatings Europe | Anti-corrosion coating |
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