CN110776825A - Antirust salt-spray-resistant graphene zinc-aluminum coating for metal surface, and preparation method and application thereof - Google Patents
Antirust salt-spray-resistant graphene zinc-aluminum coating for metal surface, and preparation method and application thereof Download PDFInfo
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- CN110776825A CN110776825A CN201911083247.3A CN201911083247A CN110776825A CN 110776825 A CN110776825 A CN 110776825A CN 201911083247 A CN201911083247 A CN 201911083247A CN 110776825 A CN110776825 A CN 110776825A
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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
- C09D4/00—Coating compositions, e.g. paints, varnishes or lacquers, based on organic non-macromolecular compounds having at least one polymerisable carbon-to-carbon unsaturated bond ; Coating compositions, based on monomers of macromolecular compounds of groups C09D183/00 - C09D183/16
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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
- C09D183/02—Polysilicates
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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
- C09D5/00—Coating compositions, e.g. paints, varnishes or lacquers, characterised by their physical nature or the effects produced; Filling pastes
- C09D5/24—Electrically-conducting paints
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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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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- 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
- C08G77/02—Polysilicates
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Abstract
The invention discloses an antirust salt-spray-resistant graphene zinc-aluminum coating for a metal surface, and a preparation method and application thereof, and belongs to the technical field of metal surface anticorrosion treatment. The graphene zinc-aluminum coating disclosed by the invention comprises the following components in parts by mass: 10-30 parts of ethyl silicate, 1-5 parts of silane coupling agent, 1-15 parts of silica sol, 0.1-1 part of reduced graphene oxide, 10-30 parts of flaky zinc powder, 1-6 parts of flaky aluminum powder, 2-20 parts of inorganic pigment, 1-10 parts of talcum powder, 0.5-2 parts of dispersing aid, 2-15 parts of isopropanol and 2-10 parts of ethanol. The coating disclosed by the invention can be used for spray protection of aluminum, iron, carbon steel and other alloy metal base materials, is low in cost and simple to operate, has good adhesion, can be applied to the field with low requirements on adhesion or limited pretreatment, can resist salt spray for more than 2500 hours, and has a wide application market.
Description
Technical Field
The invention belongs to the technical field of metal surface anticorrosion treatment, and particularly relates to an antirust salt spray resistant graphene zinc-aluminum coating for a metal surface, and a preparation method and application thereof.
Background
Corrosion of metallic materials is spread over various areas of the national economy, and commonly used protection techniques mainly improve metallic nature, corrosion inhibitors, coating protection and electrochemical protection, with coating protection being one of the most economically efficient and commonly used methods. The coating often has the effects of isolation, corrosion inhibition, electrochemical protection and the like, the anticorrosive coating can obviously slow down the corrosion damage of metal components, the coating is convenient to construct, and the effect is obvious, so that the anticorrosive coating can be widely applied to actual production and life and industrial construction. However, many coatings themselves have difficulty completely preventing corrosive media such as oxygen, hydrogen ions, etc. from reaching the metal surface.
The most effective chromate coatings have been banned in recent years by more and more countries due to their high toxicity, and therefore it is of great importance to develop environmentally friendly coatings with excellent corrosion resistance. In recent years, new anticorrosive coatings such as Symette and other products need to be cured at high temperature, thin in thickness of a single coating and complex in thick layer processing procedure, most importantly, the salt spray resistance time is mostly within 1000h, and the production requirements cannot be met, so that further improvement is needed.
Disclosure of Invention
Aiming at the problems in the prior art, the invention aims to provide the antirust salt spray resistant graphene zinc-aluminum coating for the metal surface, which has the advantages of good wear resistance, excellent conductivity and good protective performance.
In order to achieve the purpose, the invention adopts the following technical scheme:
the coating comprises the following components in parts by mass: 10-30 parts of ethyl silicate, 1-5 parts of silane coupling agent, 1-15 parts of silica sol, 10-30 parts of flaky zinc powder, 1-6 parts of flaky aluminum powder, 2-20 parts of inorganic pigment, 1-10 parts of talcum powder, 0.5-2 parts of dispersing aid, 2-15 parts of isopropanol and 2-10 parts of ethanol.
The graphene zinc-aluminum coating comprises the following components in parts by mass: 10-30 parts of ethyl silicate, 1-5 parts of silane coupling agent, 1-15 parts of silica sol, 0.1-1 part of reduced graphene oxide, 10-30 parts of flaky zinc powder, 1-6 parts of flaky aluminum powder, 2-20 parts of inorganic pigment, 1-10 parts of talcum powder, 0.5-2 parts of dispersing aid, 2-15 parts of isopropanol and 2-10 parts of ethanol.
On the basis of the scheme, the coating consists of the following components in parts by mass: 29.5 parts of ethyl silicate, 2 parts of silane coupling agent, 10 parts of silica sol, 0.5 part of reduced graphene oxide, 17 parts of flaky zinc powder, 6 parts of flaky aluminum powder, 2 parts of inorganic pigment, 5 parts of talcum powder, 0.5 part of dispersing aid, 13 parts of isopropanol and 5 parts of ethanol.
On the basis of the scheme, the preparation method of the graphene zinc-aluminum coating comprises the following steps:
(1) sequentially adding isopropanol and ethanol into ethyl silicate, and stirring at the rotating speed of 100-2000 r/min for 5-30 min;
(2) sequentially adding silica sol and silane coupling agent, and stirring at the speed of 100-2000 r/min for 5-60 min;
(3) then adding aluminum powder, zinc powder, inorganic pigment, talcum powder, graphene powder and dispersing auxiliary agent in sequence, and stirring for 30-60min at the rotating speed of 100 plus 2000 rpm.
The graphene zinc-aluminum coating prepared by the method can be used for metal surface rust prevention and salt mist resistance; the metal may be any one of aluminum, iron and alloys thereof, and is preferably carbon steel.
The graphene zinc-aluminum coating plays a role in the surface of metal through spraying, the coating needs to be filtered by a 200-mesh filter screen before the graphene zinc-aluminum coating is sprayed, and the surface of the metal needs to be subjected to phosphating treatment, laser treatment or sand blasting treatment. Preferably, it is grit blasted.
A metal surface antirust salt fog resistant method is characterized in that after the metal surface is subjected to phosphating treatment, laser treatment or sand blasting treatment, the graphene zinc-aluminum coating prepared by the method is sprayed on the surface, and the single-layer coating thickness is 20-30 mu m.
The technical scheme of the invention has the advantages
The coating disclosed by the invention is low in cost and simple to operate, and the graphene in the coating can increase the wear resistance of a product on one hand; on the other hand, the conductivity of the film layer can be increased, the utilization rate of zinc powder is improved, and the protective performance of the film layer is enhanced. The flaky zinc powder and aluminum powder are more favorable for increasing the conductivity on one hand, and are directionally arranged under the action of the auxiliary agent to form a layered structure more easily, so that the corrosion is shielded. The coating has good adhesive force, can be applied to the field with low requirement on the adhesive force or limited pretreatment, can be cured at normal temperature, has a single-layer coating thickness of 20-30 mu m, and has salt spray resistance of more than 2500 hours; the neutral salt fog resistance can reach 4000 hours.
Drawings
FIG. 1 is a layered structure diagram of a coating;
FIG. 2 is a graph of salt spray resistance test and comparison with hot dip galvanizing and electrogalvanizing;
FIG. 3 is a photograph of a salt spray test of example 2;
FIG. 4 is a photograph of a salt spray test of example 3;
FIG. 5 shows the results of the salt spray test in example 3.
Detailed Description
Terms used in the present invention have generally meanings as commonly understood by one of ordinary skill in the art, unless otherwise specified.
The present invention will be described in further detail with reference to the following data in conjunction with specific examples. The following examples are intended to illustrate the invention and are not intended to limit the scope of the invention in any way.
Example 1
The coating comprises the following components in parts by mass: 20 parts of ethyl silicate, 5 parts of silane coupling agent, 15 parts of silica sol, 10 parts of flaky zinc powder, 5 parts of flaky aluminum powder, 5 parts of inorganic pigment, 5 parts of talcum powder, 0.5 part of dispersing aid, 10 parts of isopropanol and 5 parts of ethanol.
The coating is prepared from the following components by the following method: sequentially adding isopropanol and ethanol into ethyl silicate, and stirring at the rotating speed of 1000 revolutions per minute for 5 minutes; then adding silica sol and silane coupling agent in turn, and stirring at the speed of 100 r/min for 60 min; then adding aluminum powder, zinc powder, inorganic pigment and talcum powder in sequence, stirring at the rotating speed of 100 r/min for 60min, and finishing the preparation of the coating.
Degreasing the carbon steel base material by alkali liquor, performing sand blasting treatment with the treatment standard of Sa2.5 grade, directly spraying the coating prepared by the method after sand blasting, and heating and baking for 20min at the baking condition of 200 ℃.
Example 2
The coating comprises the following components in parts by mass: 29.5 parts of ethyl silicate, 2 parts of silane coupling agent, 10 parts of silica sol, 20.5 parts of flaky zinc powder, 3 parts of flaky aluminum powder, 2 parts of inorganic pigment, 5 parts of talcum powder, 0.5 part of dispersing aid, 13 parts of isopropanol and 5 parts of ethanol.
The coating is prepared from the following components by the following method: sequentially adding isopropanol and ethanol into ethyl silicate by using a shearing emulsifying stirrer, and stirring at the rotating speed of 1000 revolutions per minute for 5 minutes; then adding silica sol and silane coupling agent in turn, and stirring at the speed of 1000 revolutions/min for 20 min; then adding aluminum powder, zinc powder, inorganic pigment and talcum powder in sequence, stirring for 20min at the rotating speed of 1000 r/min, and finishing the preparation of the coating.
After carbon steel base material is degreased by alkali liquor, it is treated by laser surface treatment, and directly sprayed with paint, and can be solidified for 48h at normal temp.
Example 3
The coating comprises the following components in parts by mass: 29.5 parts of ethyl silicate, 2 parts of silane coupling agent, 10 parts of silica sol, 0.5 part of reduced graphene oxide, 17 parts of flaky zinc powder, 6 parts of flaky aluminum powder, 2 parts of inorganic pigment, 5 parts of talcum powder, 0.5 part of dispersing aid, 13 parts of isopropanol and 5 parts of ethanol.
The coating is prepared from the following components by the following method: sequentially adding isopropanol and ethanol into ethyl silicate by using a shearing emulsifying stirrer, and stirring at the rotating speed of 1000 revolutions per minute for 5 minutes; then adding silica sol and silane coupling agent in turn, and stirring at the speed of 1000 revolutions/min for 20 min; and then sequentially adding aluminum powder, zinc powder, inorganic pigment, talcum powder, graphene powder and dispersing auxiliary agent, stirring at the rotating speed of 1000 revolutions per minute for 20 minutes, and finishing the preparation of the coating.
After carbon steel base material is degreased by alkali liquor, it is treated by laser surface treatment, and directly sprayed with paint, and can be solidified for 48h at normal temp.
The test results for examples 1-3 are as follows:
(1) evaluation of basic Properties of coatings
And (4) testing the adhesive force of the coating, and evaluating the adhesive force grade of the paint film on the surface of the tinplate base material by a check method. And (5) a paint film adhesion test result, namely observing the falling condition of the coating after repeating three times of stable tearing at the position of the scribed mark of the paint film by using a 3M adhesive tape. The adhesion test standard is referred to the evaluation method of GB/T9286-1998 marking test of paint films of colored paint and varnish.
The test results are shown in table 1:
table 1 adhesion test results for coatings
| Example 1 | Example 2 | Example 3 | |
| Adhesion test | Level 0 | Level 0 | Level 0 |
(2) Example 2 neutral salt spray experiment for treating Metal Components
The metal members respectively treated in example 2 (TZ), hot-galvanized and electrogalvanized are tested in a neutral salt spray test box for different times (0h, 120h, 480h, 900h and 2300h), and the salt spray resistance of the test samples is checked by photographing, as shown in fig. 2. From the examination of the surface of the test piece, the metal member having the coating of example 2 did not have any significant rust.
The carbon steel plate is degreased, after sand blasting, the paint disclosed in the embodiment 2 of the invention is sprayed, the dry film thickness is about 30 micrometers, the paint is baked at 200 ℃ for 20min, and the salt spray resistance is tested in a neutral salt spray test box. The results are shown in FIG. 3: the test piece turns white within 400 hours, and has no red rust within 2500 hours.
(3) Example 3 neutral salt spray resistance test for treating Metal parts
The metal members respectively treated in example 3 were tested in a neutral salt spray test box for different times, and the salt spray resistance of the test specimens was examined by photographing, as shown in fig. 4. From the examination of the surface of the test specimen, the metal member had no significant rust for 2500 hours. The metal member of example 3 was found to have no red rust within 3217h (fig. 5) by the detection with the extended detection time, which is 20 to 30% longer than that of example 2.
The above-mentioned embodiments are intended to illustrate the objects, technical solutions and advantages of the present invention in further detail, and it should be understood that the above-mentioned embodiments are only illustrative of the present invention and are not intended to limit the scope of the present invention, and any modifications, equivalent alterations and the like made within the spirit and principle of the present invention should be included in the scope of the present invention.
Claims (10)
1. The coating is characterized by comprising the following components in parts by mass: 10-30 parts of ethyl silicate, 1-5 parts of silane coupling agent, 1-15 parts of silica sol, 10-30 parts of flaky zinc powder, 1-6 parts of flaky aluminum powder, 2-20 parts of inorganic pigment, 1-10 parts of talcum powder, 0.5-2 parts of dispersing aid, 2-15 parts of isopropanol and 2-10 parts of ethanol.
2. The graphene zinc-aluminum coating is characterized by comprising the following components in parts by mass: 10-30 parts of ethyl silicate, 1-5 parts of silane coupling agent, 1-15 parts of silica sol, 0.1-1 part of reduced graphene oxide, 10-30 parts of flaky zinc powder, 1-6 parts of flaky aluminum powder, 2-20 parts of inorganic pigment, 1-10 parts of talcum powder, 0.5-2 parts of dispersing aid, 2-15 parts of isopropanol and 2-10 parts of ethanol.
3. The graphene zinc-aluminum coating according to claim 2, wherein the coating comprises the following components in parts by mass: 29.5 parts of ethyl silicate, 2 parts of silane coupling agent, 10 parts of silica sol, 0.5 part of reduced graphene oxide, 17 parts of flaky zinc powder, 6 parts of flaky aluminum powder, 2 parts of inorganic pigment, 5 parts of talcum powder, 0.5 part of dispersing aid, 13 parts of isopropanol and 5 parts of ethanol.
4. The preparation method of the graphene zinc-aluminum coating as claimed in claim 2 or 3, which is characterized by comprising the following steps:
(1) sequentially adding isopropanol and ethanol into ethyl silicate, and stirring at the rotating speed of 100-2000 r/min for 5-30 min;
(2) sequentially adding silica sol and silane coupling agent, and stirring at the speed of 100-2000 r/min for 5-60 min;
(3) then adding aluminum powder, zinc powder, inorganic pigment, talcum powder, graphene powder and dispersing auxiliary agent in sequence, and stirring for 30-60min at the rotating speed of 100 plus 2000 rpm.
5. The application of the graphene zinc-aluminum coating prepared by the method in claim 4 in metal surface rust prevention and salt mist resistance.
6. Use according to claim 5, wherein the metal is any one of aluminium, iron and alloys thereof.
7. Use according to claim 6, wherein the metal is carbon steel.
8. The use according to claims 5 to 7, wherein the graphene zinc aluminum coating is applied to the metal surface by spraying.
9. The use according to claim 8, wherein the surface of the metal is subjected to phosphating, laser treatment or sand blasting treatment before the graphene zinc-aluminum coating is sprayed on the metal.
10. A metal surface antirust salt fog resistant method is characterized in that after the metal surface is subjected to phosphating treatment, laser treatment or sand blasting treatment, the graphene zinc-aluminum coating prepared by the method of claim 4 is sprayed on the surface, and the single-layer coating thickness is 20-30 μm.
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115521645A (en) * | 2022-11-10 | 2022-12-27 | 贵州云天科贸有限公司 | Single-component inorganic zinc-rich antirust anti-slip coating |
| CN115703942A (en) * | 2021-08-12 | 2023-02-17 | 东莞高亿电子五金配件有限公司 | Paint and coating method thereof |
| CN115851076A (en) * | 2022-12-21 | 2023-03-28 | 湖北航天化学技术研究所 | Graphene zinc-containing antirust paint and preparation method thereof |
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| CN103740152A (en) * | 2013-11-12 | 2014-04-23 | 宁波墨西科技有限公司 | Graphene-modified chromium-free Dacromet coating material |
| CN107868496A (en) * | 2017-12-09 | 2018-04-03 | 珠海聚碳复合材料有限公司 | A kind of graphene inorganic primer for zinc silicate shop and preparation method thereof |
| CN108192403A (en) * | 2018-01-23 | 2018-06-22 | 永星化工(上海)有限公司 | A kind of solvent type zinc-aluminum paint |
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2019
- 2019-11-07 CN CN201911083247.3A patent/CN110776825A/en not_active Withdrawn
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103740152A (en) * | 2013-11-12 | 2014-04-23 | 宁波墨西科技有限公司 | Graphene-modified chromium-free Dacromet coating material |
| CN107868496A (en) * | 2017-12-09 | 2018-04-03 | 珠海聚碳复合材料有限公司 | A kind of graphene inorganic primer for zinc silicate shop and preparation method thereof |
| CN108192403A (en) * | 2018-01-23 | 2018-06-22 | 永星化工(上海)有限公司 | A kind of solvent type zinc-aluminum paint |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115703942A (en) * | 2021-08-12 | 2023-02-17 | 东莞高亿电子五金配件有限公司 | Paint and coating method thereof |
| CN115521645A (en) * | 2022-11-10 | 2022-12-27 | 贵州云天科贸有限公司 | Single-component inorganic zinc-rich antirust anti-slip coating |
| CN115521645B (en) * | 2022-11-10 | 2023-09-12 | 贵州云天科贸有限公司 | Single-component inorganic zinc-rich antirust anti-slip coating |
| CN115851076A (en) * | 2022-12-21 | 2023-03-28 | 湖北航天化学技术研究所 | Graphene zinc-containing antirust paint and preparation method thereof |
| CN115851076B (en) * | 2022-12-21 | 2023-10-31 | 湖北航天化学技术研究所 | Graphene zinc-containing antirust paint and preparation method thereof |
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Application publication date: 20200211 |