(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 intense 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.

Large quantities of thin galvanized coils are used in automotive manufacturing, reefer containers, the construction industry, ventilation and heating installations, and furniture manufacturing. Galvanizing has become an important anti-corrosion method for steel, not only because zinc can form a dense protective layer on the surface of steel, but also because zinc has a cathodic protection effect. When the galvanized layer is damaged, it can still prevent the iron matrix through cathodic protection material corrosion.