Galvanized steel sheet is a welded steel sheet with a hot-dip galvanized or electro galvanized layer on the surface. It is generally widely used in construction, household appliances, vehicles and ships, container manufacturing, and electro mechanical industries.

Galvanized steel sheets are divided into ordinary electrolytic sheets and anti-fingerprint electrolytic sheets. The anti-fingerprint plate is based on the ordinary electrolytic plate with a fingerprint-resistant treatment, which can resist sweat. It is generally used on parts without any treatment. The brand is SECC-N. Ordinary electrolytic plates are divided into phosphating plates and passivation plates. Phosphating is more commonly used. The brand is SECC-P, commonly known as p material. Passivated plates are oiled and unoiled.

Hot-dip galvanized steel sheet (SGCC) has one advantage over electro galvanized steel sheet (SECC). SECC bending and cross-section are extremely easy to rust, and SGCC has much better rust resistance under the same conditions. High-quality chassis usually use SECC or SGCC galvanized steel plate. The color of the chassis steel plate made of this material is bright and has a metallic luster. The advantage of this kind of steel plate is that it has good corrosion resistance.

Electro galvanized steel sheet (SECC): Uniform gray color, mainly imported, anti-fingerprint, has excellent corrosion resistance, and maintains the process ability of cold-rolled sheet. Uses: home appliances, computer case shells, and some door panels and panels.

Hot-dip galvanized steel sheet (SGCC): dip-coated, bright white, small spangles (hard to see), large spangles can clearly see hexagonal spangles. 

Divided into two kinds of galvanized sheet cut to length and galvanized sheet packaged in coils. Generally, it is packed in iron sheets, lined with moisture-proof paper, and tied with iron waists on the outside, and the ties are firm to prevent the galvanized sheets inside from rubbing against each other.

Due to the different treatment methods in the coating and plating process, the surface conditions of galvanized sheets are also different, such as the surface of ordinary spangle, fine spangle, flat spangle, non-spangle and phosphating treatment. The galvanized sheet and galvanized coil cut to length must not have defects that affect the use, but the coil is allowed to have less deformed parts such as welded parts.