Galvanized coil glossy

Galvanized coil, a thin steel sheet is immersed in a molten zinc bath to make a thin steel sheet with a layer of zinc adhere to its surface. It is mainly produced by continuous galvanizing process, that is, the rolled steel sheet is continuously immersed in a galvanized bath with molten zinc to make a galvanized steel sheet; alloyed galvanized steel sheet. This steel sheet is also made by hot dip method, but immediately after it comes out of the bath, it is heated to about 500 ° C to form an alloy coating of zinc and iron. This galvanized coil has good adhesion and weldability of the coating.

(1) normal zinc coating spangle coating zinc layer in the normal solidification process, the zinc grain free growth forming a coating with obvious zinc flower shape appearance.

(2) Small zinc coating minimized spangle coating During the solidification process, the zinc grains are artificially limited to form a zinc coating as small as possible.

(3) Spangle-free coating without zinc flower obtained by adjusting the chemical composition of the plating solution, does not have a visually visible zinc flower morphology, and has a uniform surface coating.

(4) zinc-iron alloy coating zinc-iron alloy coating conducts heat treatment on the steel strip after passing through the galvanizing bath liquid, so that the entire coating generates an alloy layer of zinc and iron. This coating has a dark gray appearance and no metallic luster. It is easy to chalk up during intense molding, and is suitable for coatings that can be directly painted without further treatment except for general cleaning.

(5) Differential coating Differential coating requires coatings with different zinc layer weights on both sides of galvanized steel sheets.

(6) Finishing skin passing Finishing is a cold rolling process of galvanized steel sheet with a small amount of deformation for one or more of the following purposes. Improve the surface appearance of galvanized steel sheet or be suitable for decorative coating; temporarily minimize the phenomenon of slip lines (Lüdes lines) or creases generated during processing of the finished product.