Galvanized sheet is a metal sheet made by coating the surface of steel sheet with zinc. Its main function is to enhance the corrosion resistance of steel sheet, thus extending its service life. Galvanized sheet is widely used in construction, home appliances, automobiles and other fields, especially in environments where steel needs to be prevented from corrosion. Galvanized sheet is usually produced by hot-dip galvanizing or electro-galvanizing process to improve the anti-oxidation performance of steel sheet.