Galvanized coil, the thin steel plate is dipped into the melted zinc tank, so that its surface adheres to a layer of zinc thin steel plate. It is mainly produced by continuous galvanizing process.

This type of steel plate is also manufactured using the hot dip method, but immediately after being removed from the groove, it is heated to around 500 ℃ to form an alloy coating of zinc and iron. This type of galvanized coil has good coating adhesion and weldability.

(1) Normal spangle coating

During the normal solidification process of the zinc layer, the zinc grains grow freely and form a coating with a clear morphology of zinc flakes.

(2) Minimized spangle coating

During the solidification process of the zinc layer, the zinc grains are artificially restricted, forming the smallest possible zinc flake coating.

(3) Spangle free zinc free coating

The coating obtained by adjusting the chemical composition of the plating solution does not have a visually visible morphology of zinc flakes and has a uniform and consistent surface.

(4) Zinc-iron alloy coating is used to heat treat the steel strip after being galvanized in the bath solution, resulting in the formation of a zinc iron alloy layer throughout the coating. This coating has a dark gray appearance and no metallic luster, making it easy to powder during intense molding. It is suitable for coatings that can be directly painted without further treatment, except for general cleaning.

(5) Differential coating

For both sides of galvanized steel plates, coatings with different zinc layer weights are required.

(6) Smooth skin pass

Finishing is a small deformation cold rolling process performed on galvanized steel plates for one or more of the following purposes.