Al2O3 nano-particle enhanced chromium-free Dacromet anti-corrosion paint, coating, and reparation method of paint and coating

A nanoparticle, anti-corrosion coating technology, applied in anti-corrosion coatings, coatings and other directions, can solve the problems of high consumption, danger, easy to cause cancer, etc., to improve compactness, ensure anti-corrosion performance and strength, improve mechanical properties and anti-corrosion. Effects of Corrosive Properties

Active Publication Date: 2016-05-04
随州武汉理工大学工业研究院
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] However, the traditional Dacromet technology has the following disadvantages: 1) There are chromium ions harmful to the human body in the Dacromet coating, and hexavalent chromium ions are easy to cause cancer and are a dangerous environmental pollutant; 2) Dacromet The sintering temperature of the coating is generally above 300 degrees, and it takes a certain amount of time, so the consumption is relatively large; 3) The surface hardness of the Dacromet coating is not high and the wear resistance is not very good; 4) The Dacromet coating The color of the layer is relatively single, and the commonly used ones are mainly silver-gray and silver-white, which is not suitable for the personalized development of the car.
As an alternative product of Dacromet coating, chromium-free zinc-aluminum coating has problems such as hardness, poor wear resistance, and inferior corrosion resistance to Dacromet coating, which limits the wide application of chromium-free zinc-aluminum coating.

Method used

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  • Al2O3 nano-particle enhanced chromium-free Dacromet anti-corrosion paint, coating, and reparation method of paint and coating
  • Al2O3 nano-particle enhanced chromium-free Dacromet anti-corrosion paint, coating, and reparation method of paint and coating
  • Al2O3 nano-particle enhanced chromium-free Dacromet anti-corrosion paint, coating, and reparation method of paint and coating

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] coating

[0040] a kind of Al 2 o 3 Nano particle reinforced chrome-free dacromet anticorrosion paint, its preparation method comprises the following steps:

[0041] 1) Preparation of metal slurry: Weigh 3.84kg flake zinc powder, 0.76kg flake aluminum powder, 4kg wetting agent (polyethylene glycol 400) and 100g dispersant (OP-10) according to the ratio, and weigh Wetting agent to fully wet the flaky zinc powder and flaky aluminum powder and stir evenly to obtain the mixed solution I, dissolve the dispersant with an appropriate amount of water, then add the obtained dispersant aqueous solution to the mixed solution I, and stir evenly at room temperature for 6~ 10h, get the metal paste;

[0042] 2) Modified Al 2 o 3 Preparation of nanoparticles: hydrolyze 100g of silane coupling agent AC-66 in water, then add 200g of Al 2 o 3 Nanoparticles, then add 90g of emulsifying dispersant OP-10, after the nanoparticles are fully dispersed, sonicate for 15-20min, and finally ...

Embodiment 2

[0052] coating

[0053] a kind of Al 2 o 3 Nano particle reinforced chrome-free dacromet anticorrosion paint, its preparation method comprises the following steps:

[0054] 1) Preparation of metal slurry: Weigh 3.3kg flake zinc powder, 0.7kg flake aluminum powder, 3.6kg wetting agent (polyethylene glycol 400) and 80g dispersant (OP-10) according to the ratio, and weigh Take the wetting agent to fully wet the flaky zinc powder and flaky aluminum powder and stir evenly to obtain the mixed solution I, dissolve the dispersant with an appropriate amount of water, then add the obtained dispersant aqueous solution to the mixed solution I, and stir evenly at room temperature for 6 ~10h, get the metal paste;

[0055] 2) Modified Al 2 o 3 Preparation of nanoparticles: 80g of silane coupling agent AC-66 was hydrolyzed in water, and then 180g of Al was added 2 o 3 Nanoparticles, then add 80g of emulsifying dispersant OP-10, after the nanoparticles are fully dispersed, then ultrason...

Embodiment 3

[0064] coating

[0065] a kind of Al 2 o 3 Nano particle reinforced chrome-free dacromet anticorrosion paint, its preparation method comprises the following steps:

[0066]1) Preparation of metal slurry: Weigh 3.612kg flake zinc powder, 0.688kg flake aluminum powder, 4.3kg wetting agent (polyethylene glycol 400) and 100g dispersant (OP-10) according to the ratio, and weigh Take the wetting agent to fully wet the flaky zinc powder and flaky aluminum powder and stir evenly to obtain the mixed solution I, dissolve the dispersant with an appropriate amount of water, then add the obtained dispersant aqueous solution to the mixed solution I, and stir evenly at room temperature for 6 ~10h, get the metal paste;

[0067] 2) Modified Al 2 o 3 Preparation of nanoparticles: 125g of silane coupling agent AC-66 was hydrolyzed in water, and then 250g of Al was added 2 o 3 Nanoparticles, then add 125g of emulsifying dispersant OP-10, after the nanoparticles are fully dispersed, then ul...

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Abstract

The invention discloses an Al2O3 nano-particle enhanced chromium-free Dacromet anti-corrosion paint. The paint comprises the following raw materials in percentage by mass: 50 to 55 percent of metal slurry, 42 to 48 percent of chromium-free passivation solution, 1 to 2 percent of modified Al2O3 nano particles, and 0.5 to 1 percent of an assistant. According to the paint, sodium molybdate, boracic acid, a rare earth material and silane coupling agent are selected and used to replace chromic anhydride to serve as the chromium-free passivation solution, and the chromium-free passivation solution is high in corrosion resistance and is environmentally friendly; the modified Al2O3 nano-particles are combined and are dispersed in the paint, so that the hardness, the abrasion resistance and the corrosion resistance of a coating can be effectively improved; the prepared paint has stable performance, smooth and flat coating surface, metal luster, high hardness, and excellent corrosion performance.

Description

technical field [0001] The invention belongs to the field of new energy materials, in particular to an Al 2 o 3 Nanoparticle-enhanced chrome-free Dacromet anticorrosion coating, Al 2 o 3 Nanoparticle-enhanced chromium-free dacromet anti-corrosion coating and its preparation method. Background technique [0002] Dacromet technology, also known as zinc-aluminum coating technology, is a surface coating technology with simple process and good anti-corrosion effect. This technology was developed by Dayang Company of the United States in 1963. The coating material is composed of flake zinc powder, flake aluminum powder, chromic anhydride, wetting agent, dispersant, reducing agent, deionized water and other additives. The mixed solution is stirred evenly to obtain the coating solution, which is applied to the surface of the workpiece, and after baking at about 300 ° C, a layer of excellent corrosion resistance coating is formed on the surface of the metal substrate. Dacromet t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D5/10C09D1/00C09D7/12
CPCC09D1/00C09D5/103C09D5/106C09D7/61C09D7/62C09D7/65
Inventor 朱春东梅嘉容李邦
Owner 随州武汉理工大学工业研究院
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