Galvanized Steel Coils

Galvanizing refers to a surface treatment technology that coats a layer of zinc on the surface of metals, alloys or other materials for aesthetics and anti-rust effects. The main method used is hot-dip galvanizing. Zinc is easily soluble in acid and alkali, so it is called amphoteric metal. Zinc hardly changes in dry air. In humid air, a dense basic zinc carbonate film will be formed on the surface of zinc. In the atmosphere containing sulfur dioxide, hydrogen sulfide and marine atmosphere, the corrosion resistance of zinc is poor, especially in the atmosphere of high temperature, high humidity and organic acid, the zinc coating is easily corroded. The standard electrode potential of zinc is -0.76V. For the steel substrate, the zinc coating is an anodic coating. It is mainly used to prevent the corrosion of steel. The quality of its protective performance is closely related to the thickness of the coating. After the zinc coating is passivated, dyed or coated with light protection agent, its protection and decoration can be significantly improved.

Characteristics of galvanizing

1. The appearance is smooth, without zinc tumors and burrs, and is silvery white; 2. The thickness is controllable and can be selected arbitrarily within 5-107μm; 3. No hydrogen embrittlement and no temperature hazard, which can ensure the mechanical properties of the material remain unchanged; 4. It can replace some processes that require hot-dip galvanizing; 5. Good corrosion resistance, neutral salt spray test up to 240 hours. Application range Steel nails, iron nails, fasteners, water pipe joints, scaffolding fasteners, steel wire rope horse-steel chucks, etc.