Galvanized coil, a thin steel plate that is immersed in a molten zinc bath to adhere a layer of zinc on its surface. The main production method is continuous galvanizing, which involves continuously immersing rolled steel plates in a molten zinc plating bath to produce galvanized steel plates; Alloyed galvanized steel plate. This type of steel plate is also manufactured using the hot dip method, but immediately after being removed from the groove, it is heated to around 500 ℃ to form an alloy coating of zinc and iron. This type of galvanized coil has good coating adhesion and weldability.