CN111286223A - Anti-corrosion zinc-aluminum coating liquid and application thereof - Google Patents
Anti-corrosion zinc-aluminum coating liquid and application thereof Download PDFInfo
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- CN111286223A CN111286223A CN202010159232.7A CN202010159232A CN111286223A CN 111286223 A CN111286223 A CN 111286223A CN 202010159232 A CN202010159232 A CN 202010159232A CN 111286223 A CN111286223 A CN 111286223A
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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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- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D5/00—Processes for applying liquids or other fluent materials to surfaces to obtain special surface effects, finishes or structures
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D7/00—Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials
- B05D7/14—Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials to metal, e.g. car bodies
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D7/00—Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials
- B05D7/24—Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials for applying particular liquids or other fluent materials
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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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- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
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Abstract
The invention relates to the technical field of mechanical coating. The invention provides an anti-corrosion zinc-aluminum coating liquid. The zinc-aluminum coating obtained by using the characteristics of high electron mobility, high strength and excellent friction performance of the graphene and the other components has excellent corrosion resistance, improves the hardness and the friction coefficient of the coating, and overcomes the defects in the prior art. The invention also provides application of the coating liquid in corrosion prevention of the automobile fastener, and a new direction is brought to protection of a base material.
Description
Technical Field
The invention relates to the technical field of mechanical coating, in particular to an anticorrosive zinc-aluminum coating liquid and application thereof.
Background
The zinc-aluminum coating liquid is a coating which takes zinc-aluminum sheets as main anti-corrosion functional materials, can achieve the purpose of cathodic protection of iron substrates by utilizing the zinc-aluminum sheets, and is one of the most important anti-corrosion coatings of the automotive fasteners at present. In order to meet the design requirements of the automobile industry on the service life and the assembly performance of products, a coating made of the zinc-aluminum coating has the characteristics of high corrosion resistance, fastening torque controllability, high temperature resistance of the use environment and the like. The zinc-aluminum coating prepared by the prior art has low neutral salt spray resistance which is only 1500h, and meanwhile, as the main components in the coating are zinc-aluminum sheets and crosslinked resin, the friction coefficient of the coating is more than 0.40, the friction coefficient is high and unstable, the surface hardness of the coating is low, scratches are easily left on the surface of the coating in the assembling process, and workpieces become defective products.
Disclosure of Invention
The invention aims to overcome the defects in the prior art, and provides an anticorrosive zinc-aluminum coating liquid which is applied to the corrosion prevention of an automobile fastener.
In order to achieve the above object, the present invention provides the following technical solutions:
the invention provides an anticorrosive zinc-aluminum coating liquid which comprises the following components in parts by weight: 1-2 parts of graphene water-based slurry, 35-39 parts of zinc sheets, 2-4 parts of aluminum sheets, 4-6 parts of silicon compounds, 1-2 parts of molybdate, 1-2 parts of boric acid and 50 parts of water.
Preferably, the graphene aqueous slurry comprises graphene, polyvinylpyrrolidone and water.
Preferably, the addition amount of the polyvinylpyrrolidone is 3-5% of the weight of the graphene aqueous slurry.
Preferably, the sheet diameter of the graphene is 1-5 μm; the addition amount of the graphene is 1-2% of the weight of the graphene water-based slurry.
Preferably, the zinc sheet and the aluminum sheet have a length of 10 to 20 μm, a width of 5 to 11 μm and a thickness of 0.1 to 0.3 μm.
Preferably, the silicon-based compound comprises a methyl silicone resin and/or an amino silicone resin; the molybdate comprises potassium molybdate and/or sodium molybdate.
The invention also provides application of the coating liquid in corrosion prevention of metal devices.
The invention also provides a method for preventing corrosion of a metal device by using the coating liquid, which comprises the following steps:
(1) dipping and centrifuging the metal device in the coating liquid;
(2) and baking the dipped and centrifuged metal device.
Preferably, the centrifugal speed of the immersion centrifugation is 200 to 250 rpm.
Preferably, the baking temperature is 320-350 ℃, and the baking time is 15-25 min.
The invention provides an anticorrosive zinc-aluminum coating liquid. According to the invention, through the characteristic of high electron mobility of graphene, after the coating liquid is coated on the fastener, the substrate can be protected from losing electrons and being corroded. The graphene also has the characteristics of high strength and excellent friction performance, and a zinc-aluminum coating obtained by the combined action of the graphene and other components has excellent corrosion resistance and improved hardness and friction coefficient.
The invention also provides the application of the coating liquid in the corrosion prevention of metal devices, and provides a new direction for the protection of base materials.
Detailed Description
The invention provides an anticorrosive zinc-aluminum coating liquid which comprises the following components in parts by weight: 1-2 parts of graphene water-based slurry, 35-39 parts of zinc sheets, 2-4 parts of aluminum sheets, 4-6 parts of silicon compounds, 1-2 parts of molybdate, 1-2 parts of boric acid and 50 parts of water.
In the present invention, the aqueous graphene slurry preferably includes graphene, polyvinylpyrrolidone, and water.
In the present invention, the addition amount of the polyvinylpyrrolidone is preferably 3 to 5% by weight, and more preferably 3.5 to 4.5% by weight of the graphene aqueous slurry.
In the invention, the sheet diameter of the graphene is preferably 1-5 μm, and more preferably 2-4 μm; the addition amount of the graphene is preferably 1-2% of the weight of the graphene water-based slurry, and more preferably 1.25-1.75%.
The invention mixes polyvinylpyrrolidone and graphene, and the balance is supplemented to 100 percent by pure water. Dispersing in high-speed dispersing and stirring equipment, wherein the rotating speed of the dispersing is preferably 500-800 rpm, and more preferably 600-700 rpm; the dispersing time is preferably 8-12 min, and more preferably 9-11 min.
In the invention, the lengths of the zinc sheet and the aluminum sheet are independent, preferably 10-20 μm, and more preferably 13-18 μm; the width is independent, preferably 5-11 μm, and more preferably 6-10 μm; the thickness is preferably 0.1 to 0.3 μm, and more preferably 0.15 to 0.25 μm.
In the present invention, the silicon-based compound is preferably methyl silicone resin and/or amino silicone resin; the molybdate is preferably potassium molybdate and/or sodium molybdate.
In the invention, the content of the graphene aqueous slurry is preferably 1 to 2 parts, and more preferably 1.25 to 1.75 parts.
In the present invention, the content of the zinc flakes is preferably 35 to 39 parts, and more preferably 36 to 38 parts.
In the invention, the content of the aluminum sheet is preferably 2 to 4 parts, and more preferably 2.5 to 3.5 parts.
In the present invention, the content of the silicon-based compound is preferably 4 to 6 parts, and more preferably 4.5 to 5.5 parts.
In the present invention, the content of the molybdate is preferably 1 to 2 parts, and more preferably 1.25 to 1.75 parts.
In the present invention, the content of boric acid is preferably 1 to 2 parts, and more preferably 1.25 to 1.75 parts.
The invention also provides application of the coating liquid in corrosion prevention of metal devices, and the metal devices are preferably automobile fasteners.
In the invention, the method for preventing the metal device from being corroded by the coating liquid comprises the following steps:
(1) dipping and centrifuging the metal device in coating liquid;
(2) and baking the dipped and centrifuged metal device.
In the present invention, the centrifugal speed of the immersion centrifugation is preferably 200 to 250rpm, more preferably 210 to 240rpm, and even more preferably 220 to 230 rpm.
In the invention, the baking temperature of the baking is preferably 320-350 ℃, and further preferably 330-340 ℃; the baking time is preferably 15 to 25min, more preferably 18 to 22min, and still more preferably 19 to 21 min.
The technical solutions provided by the present invention are described in detail below with reference to examples, but they should not be construed as limiting the scope of the present invention.
Example 1
Selecting the following components in parts by mass for preparation:
37 parts of zinc sheet, 3 parts of aluminum sheet, 5 parts of amino silicone resin, 1 part of graphene water-based slurry, 2 parts of potassium molybdate, 2 parts of boric acid and 50 parts of water.
Wherein the addition amount of the graphene is 2% of the weight of the graphene aqueous slurry, and the addition amount of the polyvinylpyrrolidone is 4% of the weight of the graphene aqueous slurry.
And mixing the components in parts by mass to obtain the anticorrosive coating liquid.
Example 2
Selecting the following components in parts by mass for preparation:
35 parts of zinc sheet, 2 parts of aluminum sheet, 4 parts of methyl silicone resin, 1 part of graphene water-based slurry, 1 part of sodium molybdate, 1 part of boric acid and 50 parts of water.
Wherein the addition amount of the graphene is 1% of the weight of the graphene aqueous slurry, and the addition amount of the polyvinylpyrrolidone is 3% of the weight of the graphene aqueous slurry.
And mixing the components in parts by mass to obtain the anticorrosive coating liquid.
Example 3
Selecting the following components in parts by mass for preparation:
37 parts of zinc sheet, 3 parts of aluminum sheet, 4 parts of amino silicone resin, 2 parts of graphene water-based slurry, 2 parts of potassium molybdate, 2 parts of boric acid and 50 parts of water.
Wherein the addition amount of the graphene is 2% of the weight of the graphene aqueous slurry, and the addition amount of the polyvinylpyrrolidone is 4% of the weight of the graphene aqueous slurry.
And mixing the components in parts by mass to obtain the anticorrosive coating liquid.
Example 4
Selecting the following components in parts by mass for preparation:
35 parts of zinc sheet, 2 parts of aluminum sheet, 3 parts of methyl silicone resin, 2 parts of graphene water-based slurry, 1 part of sodium molybdate, 1 part of boric acid and 50 parts of water.
Wherein the addition amount of the graphene is 1% of the weight of the graphene aqueous slurry, and the addition amount of the polyvinylpyrrolidone is 3% of the weight of the graphene aqueous slurry.
And mixing the components in parts by mass to obtain the anticorrosive coating liquid.
Comparative example 1
Selecting the following components in parts by mass for preparation:
37 parts of zinc sheet, 3 parts of aluminum sheet, 5 parts of amino silicone resin, 2 parts of potassium molybdate, 2 parts of boric acid and 50 parts of water.
And mixing the components in parts by mass to obtain the anticorrosive coating liquid.
Comparative example 2
Selecting the following components in parts by mass for preparation:
37 parts of zinc sheet, 3 parts of aluminum sheet, 1 part of graphene water-based slurry, 2 parts of potassium molybdate, 2 parts of boric acid and 50 parts of water.
Wherein the addition amount of the graphene is 2% of the weight of the graphene aqueous slurry, and the addition amount of the polyvinylpyrrolidone is 4% of the weight of the graphene aqueous slurry.
And mixing the components in parts by mass to obtain the anticorrosive coating liquid.
Application example 1
After the anti-corrosion coating liquid in example 1 was coated on a metal plate, immersion centrifugation and baking were performed at a rotation speed of 230rpm at a baking temperature of 330 ℃ for 20min, and the following tests were performed on the obtained coating.
Testing the friction coefficient according to ISO16047-2005 fastener fastening torque-axial pretightening force test;
testing the neutral salt spray performance according to ISO9227 neutral salt spray test Standard of Zinc and Zinc alloy coatings;
the hardness of the coating was tested according to GBT 6739-2006 "determination of paint film hardness by means of color paint and varnish pencil method".
The test results are reported in table 1.
Application example 2
After the anti-corrosion coating liquid in example 2 was coated on a metal plate, immersion centrifugation and baking were performed at a rotation speed of 200rpm at a baking temperature of 320 ℃ for 18min, and the same test as in application example 1 was performed on the obtained coating.
The test results are reported in table 1.
Application example 3
After the anti-corrosion coating liquid in example 3 was coated on a metal plate, immersion centrifugation and baking were performed at a rotation speed of 220rpm at a baking temperature of 340 ℃ for 22min, and the same test as in application example 1 was performed on the obtained coating.
The test results are reported in table 1.
Application example 4
After the anti-corrosion coating liquid in example 4 was coated on a metal plate, immersion centrifugation and baking were performed at a rotation speed of 240rpm at a baking temperature of 350 ℃ for 16min, and the same test as in application example 1 was performed on the obtained coating.
The test results are reported in table 1.
Comparative application example 1
The anti-corrosion coating liquid of comparative example 1 was applied to a metal plate, and then subjected to immersion centrifugation at 230rpm for a baking time of 330 ℃ and baking treatment for 20min, and the coating obtained was subjected to the same test as in application example 1.
The test results are reported in table 1.
Comparative application example 2
The anti-corrosion coating liquid of comparative example 2 was applied to a metal plate, and then subjected to immersion centrifugation at 230rpm for a baking time of 330 ℃ and baking treatment for 20min, and the coating obtained was subjected to the same test as in application example 1.
The test results are reported in table 1.
TABLE 1 test results
The embodiment shows that the anti-corrosion zinc-aluminum coating liquid can effectively protect the base material, prolongs the time of the base material in neutral salt spray, effectively improves the surface hardness and stabilizes the friction coefficient.
The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, various modifications and decorations can be made without departing from the principle of the present invention, and these modifications and decorations should also be regarded as the protection scope of the present invention.
Claims (10)
1. The anti-corrosion zinc-aluminum coating liquid is characterized by comprising the following components in parts by mass: 1-2 parts of graphene water-based slurry, 35-39 parts of zinc sheets, 2-4 parts of aluminum sheets, 4-6 parts of silicon compounds, 1-2 parts of molybdate, 1-2 parts of boric acid and 50 parts of water.
2. The lotion of claim 1, wherein the aqueous graphene slurry comprises graphene, polyvinylpyrrolidone, and water.
3. The masking liquid according to claim 2, wherein the polyvinylpyrrolidone is added in an amount of 3 to 5% by weight based on the weight of the graphene aqueous slurry.
4. The dope according to any one of claims 1 to 3, wherein the graphene has a sheet diameter of 1 to 5 μm; the addition amount of the graphene is 1-2% of the weight of the graphene water-based slurry.
5. The masking liquid according to claim 4, wherein the zinc flakes and the aluminum flakes have a length of 10 to 20 μm independently, a width of 5 to 11 μm independently, and a thickness of 0.1 to 0.3 μm independently.
6. The masking liquid according to claim 5, wherein the silicon-based compound comprises a methyl silicone resin and/or an amino silicone resin; the molybdate comprises potassium molybdate and/or sodium molybdate.
7. The use of the coating liquid according to any one of claims 1 to 6 for corrosion prevention of metal devices.
8. A method for preventing corrosion of a metal device by using the coating liquid according to any one of claims 1 to 6, comprising the steps of:
(1) dipping and centrifuging the metal device in coating liquid;
(2) and baking the dipped and centrifuged metal device.
9. The method of claim 8, wherein the macerating centrifuge is performed at a centrifuge speed of 200 to 250 rpm.
10. The method according to claim 8 or 9, wherein the baking temperature is 320-350 ℃ and the baking time is 15-25 min.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010159232.7A CN111286223A (en) | 2020-03-09 | 2020-03-09 | Anti-corrosion zinc-aluminum coating liquid and application thereof |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202010159232.7A CN111286223A (en) | 2020-03-09 | 2020-03-09 | Anti-corrosion zinc-aluminum coating liquid and application thereof |
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| CN111286223A true CN111286223A (en) | 2020-06-16 |
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| CN202010159232.7A Pending CN111286223A (en) | 2020-03-09 | 2020-03-09 | Anti-corrosion zinc-aluminum coating liquid and application thereof |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113025197A (en) * | 2021-04-30 | 2021-06-25 | 上海达克罗涂复工业有限公司 | Self-spraying coating for repairing zinc-aluminum coating and preparation method and use method thereof |
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| CN108373608A (en) * | 2016-11-18 | 2018-08-07 | 中国科学院金属研究所 | A kind of environment-friendly water-based chromium-free zinc aluminum conductive coating and its preparation method and application |
| CN109439187A (en) * | 2018-11-12 | 2019-03-08 | 贵州大学 | Modified chromium-free Dyclo paint of a kind of graphene and preparation method thereof |
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2020
- 2020-03-09 CN CN202010159232.7A patent/CN111286223A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20130341571A1 (en) * | 2011-03-17 | 2013-12-26 | Sumitomo Chemical Company, Limited | Metallic composite composition and mixture thereof |
| KR20140063190A (en) * | 2012-11-16 | 2014-05-27 | 주식회사 포스코 | Black resin coating steel sheet with heat-spreading ability |
| CN105008466A (en) * | 2013-03-08 | 2015-10-28 | 比克化学有限公司 | Process for providing metallic substrates with corrosion resistance |
| 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 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113025197A (en) * | 2021-04-30 | 2021-06-25 | 上海达克罗涂复工业有限公司 | Self-spraying coating for repairing zinc-aluminum coating and preparation method and use method thereof |
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