Environment-friendly type galvanizing metal surface treating agent

Abstract

The invention provides a kind of metal surface disposal which formes an environment friendly waterbase film to inhibit corrosion of the metal surface, and the disposal particularly brings excellent anti-corrosion properties with the galvanized metal products. The metal surface disposal basically contains following components which take alcohol and water as the solvent: A. silicates, polymerization silicates, fluoride silicates, B. silica (aqueous dispersion of nano) and / or SinOmXR1R2R3, C. phenolic resin and modified phenolic resin, D. stabilizer, E. pH regulator, F. thickener, G. leveling agent, H. film builder, I. wetting agent, J. antioxidant.

Description

technical field [0001] The invention relates to a chromium-free metal surface treatment agent, which can replace the commonly used metal surface treatment agent containing chromate, especially for galvanizing by replacing the metal surface treatment agent containing chromate Compared with the treatment agent containing chromate, the chromium-free metal surface treatment agent of the present invention has better antirust performance, especially can prevent white rust for a long time. Background of the invention [0002] Zinc or aluminum in metal materials such as zinc-plated steel plates and aluminum plates is easy to corrode in the atmosphere, producing a corrosion product called white rust, which not only affects the appearance of the metal material, but also has an adverse effect on the airtightness of the paint. The commonly used chromate treatment is to treat these metal materials with a metal surface treatment agent containing chromic acid, which is a widely used techni...

AI Technical Summary

Problems solved by technology

[0005] Several chromium-free metal surface treatment agents have been proposed at present, including coating galvanized steel sheets with inorganic silicates, and then treating them with organic silicon (such as U.S. Patent 5,108,793), but they still have many problems, and their antirust performance is still limited. It cannot achieve the effect that can be achieved with metal surface treatment agents containing chromate. In addition, the stability of the treatment liquid cannot meet the requirements, and the treatment process is complicated, and the on-site process cannot meet the requirements. There are also other problems such as uneven film uniformity. Good, the acid and alkali of the treatment liquid will affect the workpiece and other disadvantages

The main reason is that the components of these treatment solutions are too simple, and a variety of influencing factors are not considered, especially the effect of the combination of water-soluble silica gel and dispersible silica gel on the galvanized sheet