Galvanizing is a surface treatment technology, by plating a layer of zinc on the surface of metals, alloys or other materials, in order to achieve beautiful, rust prevention and other effects. This technology mainly adopts hot dip galvanizing method, in which the part to be plated is used as the cathode, the metal is plated to make the anode, and the two poles are respectively connected with the positive and negative poles of the DC power supply. After electrification, metal ions in the galvanizing solution move to the cathode to form a coating under the action of potential difference. Galvanized sheet is mainly used in the production of anti-corrosion building materials, vehicles, electrical equipment, household appliances and other products, with high rust, corrosion resistance and durability.

Color coating, that is, color coated steel plate, is galvanized steel plate (hot dip galvanized GI, electric galvanized) and aluminum plated zinc plate as the substrate, after surface pretreatment, with the roller coating method coated with one or more layers of liquid paint with different colors, and then after baking and cooling of the sheet. The color coated plate is treated with color on the surface of the substrate, and can be sprayed with different colors according to customer needs, so that the steel plate has good decorative performance, which is suitable for building materials, furniture, electrical appliances, transportation vehicles and other fields.