Zinc-aluminum powder passivation solution applied to water-based paint

A water-based paint and passivation liquid technology, applied in anti-corrosion paints, coatings, etc., can solve the problems of hydrogen evolution and poor stability, and achieve the effects of inhibiting hydrogen evolution, good stability and simple preparation

Active Publication Date: 2011-03-30
INST OF METAL RESEARCH - CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to the deficiency of the existing passivation mode of zinc-aluminum powder in the water-based paint, provide a kind of zinc-aluminum powder passivation solution that is applied in the water-based paint, In order to solve the problems of hydrogen evolution and poor stability of the coating, the passivation solution has a good inhibitory effect on the hydrogen evolution of the zinc-aluminum powder, and makes the water-based coating have better stability, and the preparation is simple

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] First, weigh 5g of phytic acid and put it into 500g of deionized water, and stir it magnetically for 30 minutes; then, add 0.67g of sodium molybdate and 30g of ethylene glycol butyl ether to the solution, and fully stir for 1h with a magnetic stirrer ; Then, adjust pH=8 with triethanolamine and acetic acid, and stir with magnetic force for 20 minutes, and the passivation solution is prepared.

[0026] Prepare water-based paint with passivation solution, get 25g passivation solution, add 20g zinc-aluminum powder (by weight, zinc: aluminum=8: 2), after stirring for 3 hours, add 5g water-based silicone acrylic resin, 0.5g silane Coupling agent (kh560), 0.3g sodium hexametaphosphate and 0.04g hydroxyethyl cellulose, stir evenly, and the paint is ready to use.

[0027] The stability of the paint formulated with this passivation solution can reach 40 days at room temperature.

Embodiment 2

[0029] First, weigh 5g of phytic acid and put it into 500g of deionized water, and stir it magnetically for 30 minutes; then, add 0.5g of zinc phosphate and 27g of ethanol to the solution, and stir it fully with a magnetic stirrer for 1h; Adjust the pH to 7.5 with diamine and hydrochloric acid, and stir with magnetic force for 20 minutes, and the passivation solution is prepared.

[0030] Prepare water-based paint with passivation solution, get 25g passivation solution, add 20g zinc-aluminum powder (by weight, zinc: aluminum=8: 2), after stirring for 3 hours, add 5g water-based silicone acrylic resin, 0.5g silane Coupling agent (kh560), 0.3g sodium hexametaphosphate and 0.04g hydroxyethyl cellulose, stir evenly, and the paint is ready to use.

[0031] The stability of the paint formulated with this passivation solution can reach 40 days at room temperature.

Embodiment 3

[0033] First, weigh 5g of 2-nitrophenol into 500g of deionized water, and stir magnetically for 30 minutes; then, add 0.5g of aluminum tripolyphosphate and 25g of isopropanol to the solution, and use a magnetic stirrer to Thoroughly stir for 1 hour; then, adjust the pH to 8.5 with ethylenediamine and acetic acid, and stir with magnetic force for 20 minutes, and the passivation solution is prepared.

[0034] Prepare water-based paint with passivation solution, get 25g passivation solution, add 20g zinc-aluminum powder (by weight, zinc: aluminum=8: 2), after stirring for 3 hours, add 5g water-based silicone acrylic resin, 0.5g silane Coupling agent (kh560), 0.3g sodium hexametaphosphate and 0.04g hydroxyethyl cellulose, stir evenly, and the paint is ready to use.

[0035] The stability of the paint prepared with this passivation solution can reach 50 days at room temperature.

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Abstract

The invention relates to a metal powder surface treatment technology, in particular to a zinc-aluminum powder passivation solution applied to a water-based non-chrome dacromet paint. The passivation solution comprises the following components in parts by weight: 0.5-10 parts of passivator, 25-50 parts of cosolvent, 500-1000 parts of deionized water and 0.2-5 parts of pH regulator. The passivation solution is prepared by the following steps of: firstly diluting the passivator by using the deionized water and the cosolvent into the corresponding concentration, evenly stirring, regulating the alkalinity or acidity of the system by using the pH regulator to make the final pH between 7 and 9 and finally evenly stirring to obtain the finished product. The invention can solve the problems that hydrogen dissolves out, the stability of the paint is poor and the like. The passivation solution has better hydrogen evolution inhibition action on zinc-aluminum powder, makes the stability of the water-based paint better and is simple to be prepared.

Description

technical field [0001] The invention relates to metal powder surface treatment technology, in particular to a zinc-aluminum powder passivation solution used in water-based coatings. Background technique [0002] Zinc-chromium coating (Dacromet coating) has played an indispensable role in the field of metal corrosion protection since its appearance in the 1960s. Due to its excellent corrosion resistance and hydrogen embrittlement-free performance, it has been rapidly promoted and applied. By the 1990s, Dacromet had been widely used in industries such as automobiles, bridges, construction, electric power, ships, railways and home appliances in Europe, America and Japan, and it had also been extended to the military industry. Zinc powder and aluminum powder are essential components of dacromet coatings. The proper mixing ratio of the two ensures that dacromet coatings have excellent protective performance and appearance. The hydrogen evolution activity of the zinc-aluminum mi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D7/12C09D5/10
Inventor 刘建国李庆鹏严川伟
Owner INST OF METAL RESEARCH - CHINESE ACAD OF SCI
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