What is galvanized coil?

Galvanized coil, a thin steel plate is immersed in a molten zinc bath so that a layer of zinc adheres to the surface. At present, the continuous galvanizing process is mainly used for production, that is, the rolled steel plates are continuously immersed in a plating bath containing molten zinc to make galvanized steel plates;

Alloyed galvanized steel sheet, this kind of steel sheet is also made by hot dip method, but it is heated to about 500℃ immediately after coming out of the tank, so that it can form an alloy film of zinc and iron. This kind of galvanized coil has good paint adhesion and weldability. Plating definition
(1)Normal spangle coating
During the normal solidification process of the zinc layer, the zinc grains grow freely to form a coating with obvious zinc flower morphology.

(2)minimized spangle coating
During the solidification process of the zinc layer, the zinc grains are artificially restricted to form the tiniest possible zinc flower coating. (3)Spangle-free coating
By adjusting the chemical composition of the plating solution, a coating with a uniform surface without visible spangles is obtained.

(4) zinc-iron alloy coating
The steel strip after passing through the galvanizing bath is heat treated so that the entire coating forms an alloy layer of zinc and iron. This coating has a dark gray appearance with no metallic luster and is easily powdered during the violent forming process. It is suitable for use in addition to general A coating that can be painted directly without further processing other than cleaning.

(5) Differential coating differential coating
For both sides of the galvanized steel sheet, coatings with different zinc layer weights are required.

(6)Skin pass
Finishing is a cold rolling process with slight deformation on galvanized steel sheets for one or more of the following purposes.
Improve the surface appearance of galvanized steel sheets or be suitable for decorative coatings; temporarily minimize the slip lines (Lüders lines) or creases produced during processing of finished products, etc.