Galvanizing refers to the surface treatment technology of metal, alloy or other materials with a layer of zinc coating on the surface to make the Hydraulic hinge for home installation beautiful and anti-rust.The main method used is hot galvanizing.
Zinc is easily soluble in acids and alkali, so it is called amphoteric metal.Zinc hardly changes in the dry air.In humid air, the surface of zinc produces a dense, alkaline zinc carbonate film.Zinc has poor corrosion resistance in sulfur-dioxide, hydrogen sulfide and Marine atmosphere, especially in high temperature, high humidity and organic acid atmosphere, the zinc coating is easy to be corroded.Zinc standard electrode potential is 0.76 V, for iron and steel matrix, the zinc coating belongs to the anode sex coating, it is mainly used to prevent corrosion of steel, the pros and cons of the protective performance and coating thickness of the relationship.The protective and decorative properties of zinc coatings can be improved by passivation treatment, dyeing or coating of gloss protectors.
