According to production and processing methods, it can be divided into the following categories:
①Hot-dip galvanized steel sheet. Dip the thin steel plate into the molten zinc bath, Make its surface adhere to a thin steel sheet with a layer of zinc. At present, the continuous galvanizing process is mainly used for production, that is, the rolled steel sheet is continuously immersed in the galvanized bath with molten zinc to make the galvanized steel sheet;

②Alloyed galvanized steel sheet. This kind of steel plate is also manufactured by hot dipping method, but after it is out of the tank, it is heated to about 500 ℃ immediately to form an alloy film of zinc and iron. This kind of galvanized sheet has good paint adhesion and weldability;

③Electro-galvanized steel sheet. The galvanized steel sheet produced by the electroplating method has good workability. However,the coating is thinner, and the corrosion resistance is not as good as the hot-dip galvanized sheet; In order to overcome the shortcomings of uncoated zinc on one side, there is another kind of galvanized sheet coated with a thin layer of zinc on the other side, that is, double-sided differential galvanized sheet;In addition to the above five types, there are color galvanized steel sheets, printed coated galvanized steel sheets, polyvinyl chloride laminated galvanized steel sheets, etc. But the most commonly used is still hot-dip galvanized sheet.

④Single-sided and double-sided differential galvanized steel sheet. Single-sided galvanized steel sheet is a product that is galvanized on one side only. In welding, painting, anti-rust treatment, processing, etc., it has better adaptability than double-sided galvanized sheet.

⑤Alloy and composite galvanized steel sheet. It is made of zinc and other metals such as aluminum, lead, zinc, etc. to make alloys or even composite plated steel plates. This kind of steel plate not only has excellent anti-rust performance, but also has good coating performance;