According to the production and processing methods ,galvanized sheet can be divided into the following categories:
① hot-dip galvanized steel plate.
The steel sheet was immersed in a molten zinc bath to adhere a thin layer of zinc to the surface thereof. At present, the main use of continuous galvanizing production process, that is, into a roll of steel plate is continuously immersed in the melting of zinc plating made of galvanized steel;
② alloy galvanized steel plate.
This steel plate is also made by hot-dip method, but immediately after the tank, it is heated to about 500 ℃, so that it generates zinc and iron alloy film. This galvanized sheet has a good coating of the adhesion and weldability;
③ galvanized steel plate.
The galvanized steel sheet produced by electroplating has good processability. But the coating is thinner, corrosion resistance is not as hot dip galvanized sheet;
④ single-sided plating and double-sided galvanized steel plate.
Single galvanized steel sheet, that is, only one side of the galvanized products. In the welding, painting, anti-rust treatment, processing, etc., with double-sided galvanized sheet better adaptability. In order to overcome the shortcomings of single-sided non-coated zinc, there is a side coated with a thin layer of zinc galvanized sheet, that is, double-sided galvanized sheet;
⑤ alloy, composite galvanized steel.
It is made of zinc and other metals such as lead, zinc alloy and even composite plated steel plate. This steel plate has excellent rust resistance, and good coating performance.
In addition to the above five, there are color galvanized steel, printing coated galvanized steel, PVC laminated galvanized steel and so on. But the most commonly used is still hot-dip galvanized sheet.
Galvanized steel plate can be divided into general use, roof, building with the outer side of the board, the structure used, ridge plate with, with the deep drawing and other galvanized steel.