What should the galvanized sheet material be?

Galvanized sheet material is the surface of a layer of zinc plated steel plate.

Galvanizing is an economical and effective method to prevent rust. About half of the world's zinc production is used in this process. The plates are also made by hot dipping, but are heated to about 500 ° C immediately after leaving the tank to form an alloy film of zinc and iron. The galvanized sheet has good coating adhesion and weldability. The galvanized steel plate made by electroplating has good processing properties. However, the coating is thinner and its corrosion resistance is not as good as that of hot dip galvanized sheet.

Galvanized sheet has different surface states in the coating process due to different treatment methods, such as ordinary zinc spot, fine zinc spot, flat zinc spot, zinc spot surface and phosphating surface. The German standard also specifies the surface slope. Galvanized sheet shall have a good appearance and shall not have any defects harmful to the use of products, such as no coating, holes, cracks, scum, excessive coating thickness, scratches, chromic acid dirt, white rust, etc. Foreign standards are not clear about the specific appearance defects. When ordering, the contract should list some specific defects.

Galvanized strip steel products are mainly used in construction, light industry, automobile, agriculture, animal husbandry and fishery, commercial and other industries. Among them, the construction industry is mainly used in the manufacture of anti-corrosion industry and civil building roof plate, roof grid, etc. Light industry uses it to manufacture household appliance shell, civil chimney, kitchen utensils, etc. The automobile industry is mainly used to manufacture corrosion-resistant parts of automobiles. Agriculture and animal husbandry are mainly used in food storage and transportation, meat and aquatic products frozen processing tools, mainly used in commercial material storage and transportation, packaging equipment, etc.