DX51D cold-rolled galvanized sheet 

Definition of galvanized sheet Galvanized sheet refers to the steel plate with a layer of zinc on its surface. Galvanized steel plate is to prevent the surface of the steel plate from being corroded to extend its service life. A layer of metal zinc is coated on the surface of the steel plate, which is called galvanized steel sheet. Classification of galvanized sheet ① Hot dip galvanized steel sheet. The thin steel plate is immersed in the molten zinc bath to make its surface adhere to a layer of zinc. At present, it is mainly produced by continuous galvanizing process, that is, the rolled steel plate is continuously dipped in the bath with melted zinc to make galvanized steel plate; ② Alloyed galvanized steel sheet. This kind of steel plate is also made by hot dip method, but it is heated to about 500 ℃ immediately after being out of the tank, so that it can generate zinc and iron alloy films. The galvanized sheet has good coating tightness and weldability; ③ E…