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Galvanized sheet is a product of galvanized sheet produced by continuous hot dip galvanizing process with cold rolled steel strip as the base plate。
Classification of galvanized steel coils
According to production and processing methods, it can be divided into the following categories:
A) Hot dip galvanized steel sheet. The thin steel plate is immersed in the molten zinc bath to make its surface adhere to a layer of zinc thin steel plate. At present, continuous galvanizing process is mainly used to produce galvanized steel sheets, that is, coiled steel sheets are continuously immersed in galvanized bath to produce galvanized steel sheets.
B) Alloyed galvanized steel sheet。 This kind of steel plate is also made by hot dipping method, but it is heated to about 500 C immediately after the trough is out to form zinc and iron alloy film。 The galvanized sheet has good adhesion and weldability of the coating。
C) Galvanized steel sheet. The galvanized steel sheet produced by electroplating has good processability. However, the coating is thinner and the corrosion resistance is not as good as that of hot dip galvanized sheet.
D) Single-sided and double-sided differential galvanized steel sheets. One-sided galvanized steel sheet, that is, only one-sided galvanized products. It has better adaptability than double-sided galvanized sheet in welding, painting, anti-rust treatment and processing. In order to overcome the shortcomings of single-sided galvanized sheet, there is another kind of galvanized sheet coated with thin zinc on the other side, that is, double-sided difference galvanized sheet.
E) Alloy and composite galvanized steel sheet。 It is made of zinc and other metals such as lead and zinc into alloys and even composite plated steel plates。 This kind of steel plate not only has excellent rust-proof performance, but also has good coating performance。
Galvanized sheet products are mainly used in construction, light industry, automobile, agriculture, animal husbandry, fishery and Commerce industries. The construction industry is mainly used to manufacture anti-corrosion industrial and civil building roof panels, roof grilles, etc. The light industry uses them to make household appliances shell, civil chimneys, kitchen appliances, etc. The automobile industry is mainly used to manufacture anti-corrosion parts of cars, and the agriculture, animal husbandry and fisheries are mainly used for food storage and transportation, meat and aquatic products frozen processing equipment, etc.
Business is mainly used as materials storage, transportation, packaging and other appliances.
A large number of galvanized sheets are used in automobile manufacturing, refrigeration box, construction, ventilation and heating facilities, furniture manufacturing and other fields。 Zinc plating has become an important anti-corrosion method for steel, not only because zinc can form a dense protective layer on the surface of steel, but also because zinc has cathodic protection effect。 When the galvanized layer is damaged, it can still prevent iron base materials from corroding the roof, roof components, balcony panels, window sills, newspaper kiosks, warehouses, curtain doors, heaters, rainwater pipes and so on。
Household appliances, refrigerators, washing machines, switchgear, air conditioning, microwave ovens, bread machines, photocopiers, vending machines, electric fans, vacuum cleaners, etc。
Furniture industry lampshade, wardrobe, table, bookshelf, counter, signboard, medical equipment and other transportation industry automobile ceiling, car shell, carriage board, tractor, tram, container, highway wall, ship partition, etc.
Other aspects of musical instrument shells, trash cans, billboards, clocks, photographic equipment, measuring instruments, etc。