Surface treatment Technology of Zinc Plating

- Feb 06, 2018 -

Zinc plating refers to the surface treatment technology which is coated with zinc on the surface of metal, alloy or other material to form a beautiful, rust-proof etc.

Zinc soluble in acid, but also soluble in alkali, it is called Amphoteric Metal. Zinc has little change in the dry air. In moist air, the zinc surface produces a compact alkaline zinc carbonate film. In the sulfur dioxide, hydrogen sulfide and marine atmosphere, the corrosion resistance of zinc is poor, especially in high temperature and humidity containing machine acid atmosphere, zinc coating is very easy to corrode. The standard electrode potential of zinc is -0.76v, for the steel substrate, the zinc coating belongs to the anode coating, it is mainly used to prevent the corrosion of steel, and its protective performance is related to the thickness of the coating. After passivation treatment, dyeing or coating, the zinc coating can significantly improve its protective and decorative nature.

With the development of galvanizing process, the use of high performance galvanized Brightener, galvanized has been from the pure protective purposes into the protection, decorative applications.


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