Galvanized sheet refers to a steel sheet plated with a layer of zinc on the surface. Galvanizing is a frequently used economical and effective method of rust prevention, and about half of the world’s zinc production is used in this process.
Chinese name Zinc coated steel Foreign name Zinc coated steel Function Antirust method Category Zinc production process Substance steel plate coating represents hot-dip galvanized steel
Galvanized steel plate is to prevent the surface of the steel plate from being corroded and prolong its service life. The surface of the steel plate is coated with a layer of metal zinc, which is called galvanized steel plate.
According to the production and processing methods, it can be divided into the following categories:
①Hot dip galvanized steel sheet. The sheet steel is immersed in a molten zinc bath, and a sheet of zinc is adhered to its surface. At present, it is mainly produced by continuous galvanizing process, that is, galvanized steel plate is made by continuously immersing rolled steel plates in a plating tank where zinc is melted;
②Alloyed galvanized steel sheet. This kind of steel plate is also made by hot-dip method, but after it is out of the tank, it is heated to about 500 ℃ immediately to form an alloy film of zinc and iron. This galvanized sheet has good paint adhesion and weldability;
③ Electro-galvanized steel sheet. The galvanized steel sheet produced by the electroplating method has good workability. However, the coating is thin, and the corrosion resistance is not as good as that of the hot-dip galvanized sheet;
④Single-sided and double-sided differential galvanized steel. Single-sided galvanized steel sheet, that is, a product that is galvanized on only one side. In welding, painting, anti-rust treatment, processing, etc., it has better adaptability than double-sided galvanized sheet. In order to overcome the disadvantage that one side is not coated with zinc, there is another galvanized sheet coated with a thin layer of zinc on the other side, that is, double-sided differential galvanized sheet;
⑤Alloy and composite galvanized steel sheet. It is made of zinc and other metals such as aluminum, lead, zinc, etc. to make alloys or even composite plated steel plates. This kind of steel plate not only has excellent anti-rust performance, but also has good coating performance;
In addition to the above five types, there are also colored galvanized steel sheets, printed and painted galvanized steel sheets, and PVC laminated galvanized steel sheets. But the most commonly used is still hot-dip galvanized sheet.
Main production plants and import producing countries:
①Main domestic production plants: WISCO, Angang, Baosteel Huangshi, MCC Hengtong, Shougang, Pangang, Handan, Magang, Fujian Kaijing, etc.;
②The main foreign producers are Japan, Germany, Russia, France, South Korea, etc.
Post time: Jul-18-2022