Classification of galvanized steel sheet

According to production methods, it can be divided into the following five categories:

1. Hot-dip galvanized steel sheet. The thin steel plate is immersed in the molten zinc tank, so that a thin steel plate with a layer of zinc adheres to the surface. At present, it mainly adopts continuous galvanizing process to produce galvanized steel sheet by continuously passing the rolled steel sheet through the molten zinc solution.

2. Alloyed galvanized steel sheet. This kind of steel plate is also manufactured by hot dipping method. After being discharged from the zinc tank, it is immediately heated to about 500°C to form an alloy film of zinc and iron. This kind of galvanized sheet has good paint adhesion and weldability.

3. Electro-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.

4. Single-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. In order to overcome the shortcomings of uncoated zinc on one side, there is a galvanized sheet coated with a thin layer of zinc on the other side, that is, double-sided differential galvanized sheet.

5. Alloy, composite galvanized steel sheet. It is a steel plate made of zinc and other metals such as lead and zinc alloy and even composite plating. This kind of steel plate not only has excellent anti-rust performance, but also has good coating performance. 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. At present, the most commonly used is still hot-dip galvanized sheet.