The galvanized steel sheet is used to prevent the surface of the steel sheet from being corroded and prolonged. The surface of the steel sheet is coated with a layer of metallic zinc. This zinc-coated steel sheet is called a galvanized sheet.Mainly divided into the following categories: 1 hot dip galvanized steel sheet. The steel sheet is immersed in a molten zinc bath to adhere a zinc-plated steel sheet to the surface. At present, it is mainly produced by a continuous galvanizing process, that is, a coiled steel plate is continuously immersed in a plating tank in which zinc is melted to form a galvanized steel sheet;
2 alloyed galvanized steel sheet. This steel sheet is also produced by hot dip, but immediately after it is discharged, it is
heated to about 500 ° C to form an alloy film of zinc and iron. This galvanized sheet has good adhesion and weldability of the
coating