1. Galvanized steel sheet SECC

The substrate of SECC is general cold-rolled steel coil. After continuous degreasing, pickling, electroplating and various post-treatment processes, it becomes an electro-galvanized product. SECC not only has the mechanical properties and approximate processability of general cold rolled steel sheets, but also has superior corrosion resistance and decorative appearance. It has great competitiveness and substitution in the market of electronic products, home appliances and furniture. For example, the computer case is commonly used in SECC.

2. Ordinary cold rolled sheet SPCC

SPCC refers to the continuous rolling of steel ingots into cold rolled steel sheets or sheets of required thickness. There is no protection on the surface of SPCC. It is very easy to be oxidized when exposed to the air, especially in a humid environment. The oxidation speed is accelerated, and dark red rust appears. The surface should be painted, electroplated or other protection during use.

⒊ Hot-dip galvanized steel sheet SGCC

Hot-dip galvanized steel coil refers to the semi-finished product after hot-rolled pickling or cold rolling, which is washed, annealed, and immersed in a molten zinc bath at a temperature of about 460 ° C, so that the steel sheet is coated with a zinc layer, and then tempered. Levelling and chemical treatment. SGCC material is harder than SECC material, poor ductility (avoid deep drawing design), thicker zinc layer, and poor weldability.