Plating definition

2018-09-04 16:03

(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.