Galvanized coil is a thin steel plate immersed in a molten zinc bath, with a layer of zinc adhering to its surface. It is mainly produced by the continuous galvanizing process, that is, the rolled steel plates are continuously immersed in the galvanizing bath with molten zinc to make galvanized steel plates. Alloyed galvanized steel sheet. This type of steel plate is also manufactured by the hot-dip method. However, immediately after being taken out of the bath, it is heated to around 500℃ to form an alloy coating of zinc and iron. This galvanized coil has good adhesion of the coating and weldability.