Galvanized steel refers to ordinary carbon construction steel that has been galvanized to effectively prevent corrosion and rust of the steel and extend the service life of the steel. Galvanizing is divided into electro-galvanizing and hot-dip galvanizing. Generally used in building exterior walls, such as glass curtain walls, marble curtain walls, aluminum curtain walls as columns and stress-bearing materials, or used in outdoor telecommunications towers, highways and other open-air buildings. Steel is called galvanized steel, among which galvanizing is divided into electro-galvanizing and hot-dip galvanizing. Dip galvanized.
Galvanized steel sheets are coated with a layer of metallic zinc on the surface to prevent corrosion on the surface of the steel sheets and extend their service life. This zinc-coated thin steel sheet is called a galvanized sheet.
Different types of galvanized steel use different materials, such as.
1. Hot-dip galvanized steel plate. A thin steel plate is immersed in a molten zinc bath so that a layer of zinc adheres to its surface. At present, the continuous galvanizing process is mainly used for production, that is, the rolled steel plates are continuously immersed in a plating bath containing molten zinc to make galvanized steel plates;
2. Alloyed galvanized steel plate. This kind of steel plate is also made by the hot dip method, but it is heated to about 500°C immediately after coming out of the tank to form an alloy film of zinc and iron. This kind of galvanized sheet has good paint adhesion and weldability;
3. Electro-galvanized steel plate. This kind of galvanized steel sheet manufactured by electroplating method has good processability. However, the coating is thin and its corrosion resistance is not as good as that of hot-dip galvanized sheets;
4. Single-sided galvanized steel plate and double-sided galvanized steel plate. Single-sided galvanized steel sheet is a product that is galvanized on only one side. In terms of welding, painting, anti-rust treatment, processing, etc., it has better adaptability than double-sided galvanized sheets. In order to overcome the shortcomings of one side not being coated with zinc, there is another type of galvanized sheet that is coated with a thin layer of zinc on the other side, that is, double-sided galvanized sheet;
5. Alloy and composite galvanized steel sheets. It is made of zinc and other metals such as lead, zinc alloy or even composite plated steel plate. This kind of steel plate has both excellent anti-rust properties and good painting properties.
The hardness of galvanized steel depends on the steel grade and condition of the base plate, and is generally around 150 degrees Brinell.
