Galvanized sheet is a metal sheet coated with a layer of zinc on the surface of the steel sheet to prevent corrosion on the surface of the steel sheet and extend its service life. The main characteristics of galvanized sheets are strong corrosion resistance, not easy to curl, strong ductility and strong surface plasticity.
The corrosion resistance of galvanized sheets mainly comes from the zinc layer on its surface. Zinc is a very active metal that can form stable zinc oxide, hydrated zinc oxide and zinc carbonate with oxygen, water vapor, carbon dioxide, etc. in the air. These compounds can effectively prevent corrosion on the surface of steel plates. Therefore, galvanized sheets have good corrosion resistance in humid environments, , alkalis, and salts.
During the production process of galvanized sheets, the zinc layer is closely combined with the surface of the steel sheet through hot-dip galvanizing, cold galvanizing and other processes to form a special zinc-iron alloy layer. This alloy layer not only has high hardness, but also has strong bonding force with the surface of the steel plate and is not prone to curling, peeling and other phenomena. Therefore, galvanized sheets are less prone to problems such as curling and peeling during processing, transportation, and use.
The ductility of galvanized sheet mainly comes from the steel sheet as its base material. Steel plate is a metal material with good ductility and can be deeply processed through cold rolling, hot rolling and other processes to form various complex shapes. During the galvanizing process of galvanized sheets, the zinc-iron alloy layer formed between the zinc layer and the surface of the steel sheet not only has good corrosion resistance, but also does not affect the ductility of the steel sheet. Therefore, galvanized sheets have good ductility and can meet the processing needs of various complex shapes.
The surface plasticity of galvanized sheets is strong, which is mainly reflected in the smoothness and decoration of its surface. Galvanized sheets have a high surface finish and can be used directly as decorative panels. They can also be surface treated through spraying, electroplating, hot dipping and other processes to increase their decorative properties. In addition, the surface of galvanized sheets can also be plated with various metal coatings such as chromium plating, nickel plating, copper plating, etc. to meet different decorative needs.
In short, galvanized sheets have been widely used in construction, automobiles, ships, home appliances and other fields due to their strong corrosion resistance, resistance to curling, strong ductility, and strong surface plasticity.