Galvanized coil: dip the steel sheet into the molten zinc bath to make the surface adhere with a layer of zinc. At present, it is mainly produced by continuous galvanizing process, that is, the rolled steel plate is continuously immersed in the zinc bath to make galvanized steel plate; Alloyed galvanized steel plate. This kind of steel plate is also made by hot-dip method, but it is heated to about 500 ℃ immediately after being out of the tank to form an alloy film of zinc and iron. This galvanized coil has good coating adhesion and weldability.

The layer steel plate has light weight, beautiful appearance and good anti-corrosion performance, and can be directly processed. It provides a new raw material for the construction industry, shipbuilding industry, vehicle manufacturing industry, furniture industry, electrical industry, etc., and has played a good role in replacing wood with steel, efficient construction, energy saving and pollution prevention. The color coated steel plate using galvanized steel plate as the base plate, in addition to zinc protection, the organic coating on the zinc layer plays a role of covering and isolation, which can prevent the steel plate from rusting and has a longer service life than the galvanized steel plate. It is reported that the service life of the coated steel plate is 50% longer than that of the galvanized steel plate.

Classification of galvanized sheet

1. Alloyed galvanized steel sheet: the steel sheet produced by hot dip method has good weldability and adhesion.
2. Hot dip galvanized steel sheet: This is a thin steel sheet with a thin layer of zinc attached to its surface. Its production process is continuous galvanization.
3. Electro galvanized steel plate: the steel plate is galvanized by energizing, but the zinc plated in this way is relatively thin and the corrosion resistance is poor.
4. Single side galvanized steel plate: only one side of the steel plate is coated with zinc. Whether it is used for processing, coating or welding, the adaptability is better than that of double-sided galvanized steel plate.
5. Double sided difference galvanized steel plate: there are still some disadvantages of single-sided galvanized steel plate. In order to overcome these disadvantages, a thin layer of zinc will be coated on the other side of the steel plate, which is double-sided difference galvanized steel plate.
6. Composite galvanized steel plate: in addition to pure steel, there are also conforming steel plates composed of lead, aluminum and other metals, and then a layer of zinc is plated on the surface. This kind of steel plate has better anti rust performance and better coating performance.

Application of galvanized sheet

Construction industry (outdoor) factory buildings, agricultural warehouses, residential prefabricated components, corrugated roofs, walls, rainwater pipes, balcony railings, book and newspaper kiosks, refrigerators, goods kiosks, roller shutter doors, construction industry (indoor) doors, door frames, light steel structures, screens, ceilings, elevators, stairs, ventilation ducts, electrical appliances, refrigerators, washing machines, switch cabinets, instrument cabinets, air conditioners, microwave ovens, bread machines, furniture, radiators, lampshades, wardrobes Table, bed, locker, bookshelf transportation, etc.