High temperature resistant metal passivator

Abstract

The invention relates to a high temperature resistant metal passivator, wherein the main raw materials thereof comprise the following components in percentage by mass: 93-95 percent of water, 1-2 percent of phosphate, 0.5-1 percent of accelerant, 0.05-0.1 percent of surfactant and 3-4 percent of high temperature resistant passivation component. The phosphate is one of disodium hydrogen phosphate, monobasic sodium phosphate and sodium phosphate; the accelerant is one of cerium carbonate dehydrate, cerium nitrate and cerous nitrate; the surfactant is one or the mixed compound of OP-10, TX-100 and NP-5, and the mass ratio of the mixed compound is 2:1:1; the high temperature resistant passivation component is one of zirconyl chloride and zirconyl nitrate; and the passivator is regulated through a phosphoric acid, and the pH value thereof is 3.0-5.0. A layer of uniform and compact passivation film is rapidly formed on the surface of a steel material processed through the high temperature resistant metal passivator, the film has strong corrosion-resistant performance, and a passivated steel part has good corrosion-resistant performance whether blow-dried or dried at the temperature of 200-250 DEG C.

Description

technical field [0001] The invention relates to a passivator, in particular to a high temperature resistant metal passivator. Background technique [0002] Spraying on the surface of steel materials is a common process. Before spraying, in order to improve the adhesion between the paint and the metal substrate and prevent surface corrosion, phosphating and passivation treatment methods must be adopted. [0003] At present, there are generally three types of passivating agents used for steel passivation treatment, namely: chromate, molybdate and organic passivating agent. [0004] Although chromate is used as a passivator with low cost and good corrosion resistance, it has high toxicity and is easy to cause cancer. After discharge, it causes great pollution to the environment and is difficult to treat. Therefore, the use of chromate is strictly restricted. [0005] Organic passivators are expensive, and emit various irritating odors. Long-term exposure has carcinogenic effec...

AI Technical Summary

Problems solved by technology

[0004] Although chromate is used as a passivator with low cost and good corrosion resistance, it has high toxicity and is easy to cause cancer. After discharge, it will cause great pollution to the environment and is difficult to treat. Therefore, the use of chromate is strictly restricted.

[0005] Organic passivators are more expensive and emit various pungent odors. Long-term exposure has carcinogenic effects. Passivators are prone to produce bacteria, deteriorating water bodies and causing environmental pollution problems.

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