Galvanized Steel Coil(Zinc-coated ) in which a sheet of steel is immersed in a molten zinc bath so that the surface adheres to a sheet of zinc.At present the main use of continuous zinc production process, that is, the rolled steel sheet continuous dip in the melting zinc plating bath made of galvanized steel sheet;Alloy galvanized steel sheet.This kind of steel plate is made by hot dip method, but after the slot, immediately heated to a temperature of about 500 ℃, it make the generation of zinc and iron alloy membrane.This galvanized coil has good coating tightness and weldability.