Galvanized sheet can be divided into the following categories according to production and processing methods

① Hot-dip galvanized steel sheet. The thin steel sheet is immersed in the molten zinc bath to make a thin steel sheet with a layer of zinc adhere to its surface. At present, it is mainly produced by continuous galvanizing process, that is, the rolled steel sheet is continuously immersed in a galvanized bath with molten zinc to make a galvanized steel sheet;

② Alloyed galvanized steel sheet. This steel sheet is also made by hot dip method, but immediately after grooving, it is heated to about 500 ° C to form an alloy film of zinc and iron. This galvanized sheet has good coating adhesion and weldability;

③ Electro-galvanized steel sheet. The galvanized steel sheet made by electroplating has good processability. However, the coating is thinner and the corrosion resistance is not as good as that of hot-dip galvanized sheet;

④ Single-sided galvanized steel sheet and double-sided differential galvanized steel sheet. Single-sided galvanized steel sheet, that is, a product that is only galvanized on one side. In terms of welding, painting, anti-rust treatment, processing, etc., it has better adaptability than double-sided galvanized sheet. In order to overcome the shortcomings of uncoated zinc on one side, there is another galvanized sheet coated with a thin layer of zinc on the other side, that is, double-sided differential galvanized sheet;

⑤ Alloy and composite galvanized steel plate. It is an alloy or even a composite plated steel plate made of zinc and other metals such as aluminum, lead, zinc, etc. This steel plate has both excellent anti-rust performance and good coating performance;

In addition to the above five, there are also color galvanized steel sheet, printed and coated galvanized steel sheet, polyvinyl chloride laminated galvanized steel sheet, etc. But the most commonly used is still hot-dip galvanized sheet.