Galvanized steel coils use hot-rolled steel strips or cold-rolled steel strips as the base material, and undergo a continuous hot-dip galvanizing process to produce galvanized steel coils. Galvanizing refers to coating the surface of steel with a layer of zinc to prevent corrosion of the steel. Since zinc is more metallically active than iron, it can protect steel from corrosion even if the zinc is damaged.
What is the production process of galvanized steel coils?
Hot-rolled pickled coil → uncoiling → head and tail cutting → welding → ring entry → annealing furnace → hot dip galvanizing → cooling after galvanizing → zinc layer thickness gauge → finishing and straightening → passivation treatment → inspection bench → electrostatic oiling →Coiling→Weighing and packaging→Storage of finished products.
Galvanized steel panels are coated with a layer of metallic zinc on the surface to prevent corrosion on the surface of the steel panels and extend their service life. This zinc-coated steel panel is called a galvanized panel.
Classification?
It can be divided into the following categories according to production and processing methods:
①Hot-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;
②Alloyed galvanized steel sheet. 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;
③Electro-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;
⑤Alloy, composite galvanized steel plate. It is made of zinc and other metals such as aluminum, lead, zinc, etc., which are alloyed or even composite plated steel plates. This kind of steel plate has both excellent anti-rust properties and good painting properties;
In addition to the above five types, there are also colored galvanized steel sheets, printed and painted galvanized steel sheets, PVC laminated galvanized steel sheets, etc. But currently the most commonly used is still hot-dip galvanized sheet.
GI coil manufacturers
GNEE Steel Group is a professional galvanized coil manufacturer and supplier in China. In addition to galvanized steel coils, we can also provide customers with color-coated galvanized steel coils, galvalume-coated steel coils, color-coated galvalume steel coils, corrugated sheets, etc.
Welcome to call us for price consultation!
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