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Zinc standard electrode potential of -0.76V, for the steel substrate, the zinc coating is anodic coating, which is mainly used to prevent corrosion of steel, the pros and cons of protective performance and coating thickness has a great relationship.
Zinc plating after passivation, dyeing or coating with a light agent, can significantly improve its protective and decorative. With the development of galvanizing process, the use of high-performance galvanized brightener, galvanizing has entered the protective - decorative applications from the simple purpose of protection.
Zinc plating solution cyanide bath and cyanide bath two types. Cyanide bath sub-cyanide, low cyanide, cyanide, and several types of high-cyanide. Cyanide bath with alkaline zincate bath, ammonium bath, sulfate bath and non-ammonia chloride bath. Plating capacity of cyanide zinc plating solution are good, the coating is smooth and meticulous, long-term use in the production. However, cyanide poisoning, serious environmental pollution, has tended to adopt low cyanide, cyanide, cyanide-free zinc plating solution.