GI/GL/PPGI/PPGL Galvanized Sheet Zinc Roll DX51D DX52D DX53D

Introduction: galvanized coil, the steel sheet is immersed in the molten zinc bath to make its surface adhere to a layer of zinc. It is mainly produced by continuous galvanizing process, that is, the rolled steel plate is continuously immersed in the zinc melting bath to make galvanized steel plate; 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 coming out of the groove to form an alloy coating of zinc and iron. The galvanized coil has good coating adhesion and weldability. The galvanized layer can reduce the folding corrosion (white rust) under the condition of damp temperature storage and transportation through passivation treatment. However, the anti-corrosion performance of this chemical treatment is limited, and it hinders the adhesion of most coatings. This treatment is generally not used in zinc iron alloy coating. In addition to finishing the surface, as a routine, the manufacturer shall passivate other types of zinc coating.