The galvanized steel coil is immersed in a molten zinc bath to adhere a thin layer of zinc to the surface. At present, it is mainly produced by a continuous galvanizing process, that is, a coiled steel plate is continuously immersed in a zinc-plated plating tank to form a galvanized steel sheet; an alloyed galvanized steel sheet. This steel sheet is also produced by hot dip, but immediately after it is discharged, it is heated to about 500 ° C to form an alloy coating of zinc and iron. This galvanized roll has good adhesion and weldability of the coating.galvanized steel coils supplier
Plating definition of galvanized steel strip：
1.finishing skin pass
Finishing is a cold rolling process of a small amount of deformation of a galvanized steel sheet for one or more of the following purposes.
Improve the surface appearance of galvanized steel sheet or suitable for decorative coating; temporarily reduce the phenomenon of slip line (Rüdes line) or crease generated when the finished product is not processed.
2.Normal zinc flower coating spangle coating
In the normal solidification process of the zinc layer, the zinc crystal grains are freely grown to form a coating having a distinct zinc flower morphology.
3.small zinc flower plating minimized spangle coating
During the solidification of the zinc layer, the zinc grains are artificially restricted to form as fine a zinc coating as possible.
4.zinc-free flower coating spangle-free
By adjusting the chemical composition of the plating solution, there is no visible visible zinc flower morphology and a uniform coating on the surface.
5.Zinc-iron alloy coating zinc-iron alloy coating
The steel strip after passing through the galvanizing bath is heat-treated to form an alloy layer of zinc and iron throughout the plating layer. The coating has a dark gray appearance, no metallic luster, and is easy to be pulverized during vigorous molding, and is suitable for general purpose. In addition to cleaning, the coating can be applied directly without further processing.
For both sides of a galvanized steel sheet, a coating having a different weight of the zinc layer is required.