Galvanized steel coil (GI) surface treatment process

With the continuous expansion of industrial development, the demand for galvanized steel coil (GI) is driven. The product mainly adopts continuous galvanizing process, with a layer of zinc attached on its surface. Because of its good adhesion and weldability, is favored by the majority of users. Although the product is frequently used, but a wide variety of production processes, mainly on demand processing.
The surface treatment of galvanized steel coil (GI) can be divided into many kinds, passivation treatment is one of them. Passivation can reduce water temperature and can lead to rust under storage and transport conditions. This treatment process is not generally used for the surface of the alloy galvanized layer, usually as a conventional galvanized layer treatment process. Oiling is a coating of oil on the surface of steel plate after passivation treatment, mainly to reduce moisture. Typically, the product is coated with a transparent organic film. This film can not only play an anti-corrosion role, but also has a special anti-fingerprint characteristics.
Phosphating can be applied to a variety of coated products without further coating treatment other than normal cleaning. This process not only improves the adhesion and corrosion resistance of galvanized steel coil (GI) coatings, but also reduces the risk of corrosion during storage and transportation. In addition, in phosphating treatment, can be used with lubricant, mainly to improve the molding performance.

Post time: Jun-20-2022