The hot-dip galvanized steel sheets produced by Chinese manufacturers are mainly used in building materials, light industry, agriculture, transportation and other industries. Due to the limitations of the existing hot-dip galvanizing equipment conditions, process technology and original board performance, the actual production of galvanized sheets for the automotive industry is very small.
Galvanized steel sheet processing methods can be divided into the following categories:
1. hot dip galvanized steel sheet
The thin steel plate is immersed in the molten zinc tank, so that a thin Galvanized Mild Steel sheet with a layer of zinc adheres to the surface. At present, the continuous galvanizing process is mainly used for production, that is, the rolled steel sheet is continuously immersed in the molten zinc plating tank to make the galvanized steel sheet;
2. Alloyed galvanized steel sheet
This kind of steel plate is also manufactured by hot dipping method, but after exiting the tank, 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 mild steel sheet produced by the electroplating method has good workability. But 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 only one side. 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 another galvanized sheet coated with a thin layer of zinc on the other side, namely double-sided differential galvanized sheet;
5. Alloy, composite galvanized steel sheet
It is a Galvanized Mild steel sheet made of zinc and other metals such as lead and zinc alloys and even composite plating. This kind of steel plate not only has anti-rust performance, but also has good coating performance.
