This kind of steel plate is also made by hot dip method, but immediately after the trough, it is heated to about 500℃, so that it produces zinc and iron alloy coating. This galvanized coil has good coating tightness and weldability.
Coating definition editing voice
(1) normal zinc coating Spangle coating
In the normal solidification process of zinc layer, the zinc grain grows freely and forms the coating with obvious zinc flower morphology.
(2) Minimized Spangle coating with small zinc flower coating
During the solidification of zinc layer, the zinc grains are artificially limited to form the smallest zinc flowered coating.
(3) Zinc-free flower coating Spangle-free
By adjusting the chemical composition of the bath, the coating is uniform on the surface without visible zinc flower morphology.
(4) Zinc-iron alloy coating
The steel strip through the galvanized bath after heat treatment, so that the entire coating zinc and iron alloy layer, the coating appearance is dark gray, no metallic luster, in the intense molding process is easy to powder, suitable for in addition to the general cleaning, without further processing can be directly painted coating.
(5) Differential coating with thick coating
On both sides of galvanized steel plate, the requirement has different zinc layer weight coating.
(6) All skin passes
Finishing is a cold rolling process of galvanized steel with a small amount of deformation for one or more of the following purposes. Improve the surface appearance of galvanized steel plate or suitable for decorative coating; The product is not processed when the slippage line (Luders line) or folding phenomenon temporarily reduced to a minimum, etc. SGCC Galvanized Sheet China Z150 Zinc Coated GI Corrugated Coil