alloyed galvanized steel
Galvanized steel is to prevent the steel surface from corrosion and prolong its life, the steel surface coated with a layer of metallic zinc, zinc-coated steel sheet which is referred to as galvanized sheet. Galvanized by the production and processing methods can be divided into the following categories: ① hot-dip galvanized steel. The steel sheet was immersed in molten zinc bath, the adhesion to the surface layer of zinc sheet steel. At present, continuous galvanizing production process, namely the continuous roll of steel is immersed in the plating bath of molten zinc is made of galvanized steel; ② alloyed galvanized steel. This plate is manufactured by hot dipping, but after the tank, immediately put it heated to about 500 ℃, it generates an alloy of zinc and iron coating. This galvanized sheet has good adhesion and weldability; ③ electro-galvanized steel sheet. This galvanized steel sheet manufactured with good workability by plating. But the coating is thin, the corrosion resistance is better hot dipping galvanized sheet; ④ single-sided and double-sided difference galvanized steel plating. Sided galvanized steel, that is only one side of galvanized products. In terms of welding, painting, anti-rust treatment, processing, it has a better than two-sided galvanized sheet flexibility. To overcome the disadvantages of single uncoated zinc, another one in another top coat with a thin layer of zinc galvanized sheet, namely the difference between double-sided galvanized sheet; ⑤ alloy, composite galvanized steel. It is steel with zinc and other metals such as lead, zinc alloy and even made into a composite plating. This plate not only has excellent anti-corrosion properties, and good coating performance.
Galvanized steel can be divided into general use by end-use, roof, building outer plate, structural, tile ridge board, stretching and deep drawing, etc. galvanized steel.
Hot-dip galvanizing process is mainly the scope of application: in industry, construction, power facilities, chemical facilities, machinery manufacturing, petroleum, agricultural facilities, communications facilities, fire facilities, railways, highways and other transportation facilities
The main production plant and imported production Country:
Domestic main production plant: Wuhan, Anshan, Sha Steel, Baosteel and Guangdong; foreign major producing countries Japan, Germany, Russia and France.
1, surface condition: galvanized sheet coating process due to the different treatment, surface state is different, such as the common spangles, fine spangle, smooth spangle, spangle-free surface phosphate processing and the like.
2, galvanized sheet should have good appearance, without the use of harmful defects of the product, such as no plating, holes, cracks and dross, more than plating thickness, abrasions, Nuo dirt, rust and other white. Foreign standard provisions for specific cosmetic defects are not very clear.
Packaging cut into cut lengths of galvanized sheet and coil galvanized sheet packaging two kinds. General metal packaging, lined with waterproof paper outside to Tieyao child strapped to the bay. Strapping to securely prevent the built-in galvanized plate rubbing against each other.