Coated steel is made of metal coils (cold-rolled sheet, hot-dip galvanized sheet, aluminized sheet, high aluminum alloy sheet, stainless steel sheet, etc.) as the base material, coated or laminated with various organic coatings or plastic films on the surface . Since it is a coil with surface coating completed in a metallurgical factory, it can be directly processed into products by users, so it is also called pre-coated coil. Galvanized steel is one of the most commonly used coated steels. The cold-rolled sheet is coated with metallic zinc to make the sheet corrosion-resistant.www.tenral.com/coating-steel-stamping/