Galvanized steel plate, that is, a layer of metallic zinc is coated on the surface of the steel plate to prevent the surface from being corroded due to external factors and prolong the service life of the steel plate.
According to different production and processing methods, galvanized steel sheets can be divided into the following categories:
(1) Hot-dip galvanized steel sheet: this type of steel sheet refers to immersing the steel sheet in a bath containing dissolved zinc to make the zinc adhere to the surface of the steel sheet.
(2) Alloy galvanized steel sheet: the production process of alloy galvanized steel sheet is also manufactured by hot dip method. However, this method also needs to wait for it to be heated to about 500 ℃ immediately after it is out of the tank to form an alloy film of zinc and iron. Alloy galvanized steel sheet has good adhesion and weldability.
(3) Electro-galvanized steel sheet: the galvanized steel sheet produced by the electroplating method has good processing properties. However, the galvanized layer 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 where only one side of the steel sheet is galvanized. In welding, painting, anti-rust treatment, processing, etc., it has better adaptability than double-sided galvanized sheet. In order to overcome the shortcomings of no zinc coating on one side, the other side is made into a thin galvanized sheet, that is, a double-sided differential galvanized sheet.
(5) Alloy, composite galvanized steel sheet: galvanized steel sheet compounded by metals such as zinc and lead-zinc alloy. This kind of steel plate not only has excellent anti-rust performance, but also has good coating performance.