The demand for galvanized coil construction and light industry in Dalian is the main market for galvanized sheet, and its demand accounts for about 30% of galvanized sheet. And from the perspective of the consumption of galvanized steel in the home appliance industry, air conditioners are the main consumer products of galvanized steel.
The back panel of the indoor unit of the air conditioner, the back panel of the cabinet unit, the internal parts, the outer shell and the interior of the outdoor unit are all made of galvanized sheet. On average, an air conditioner consumes 22 kg of galvanized sheet. In addition, each washing machine consumes 8 kg of galvanized sheet and each refrigerator consumes 3 kg of galvanized sheet.
Galvanizing is a new type of metal material, that is, a very thin steel plate is put into liquefied zinc, and by soaking, the steel and liquid zinc react chemically, thereby attaching a thin layer of zinc on the surface of the steel. The same is true of galvanized coils, of course, the coiled steel sheet is put in soak and added.
Single and double-difference galvanized steel roll. Single-sided galvanized steel coil, that is, products with only one side galvanized. In welding, painting, anti-rust treatment and processing, it has better adaptability than double-sided galvanized coil. In order to overcome the shortcomings of uncoated zinc on one side, there is another type of galvanized coil coated with a thin layer of zinc on the other side, that is, double-sided differential galvanized coil; alloy and composite galvanized steel coil. It is made of zinc and other metals such as lead, zinc, and even composite plated steel coils.
This galvanized steel coil has both excellent rust prevention performance and good coating performance. The reason why it is plated with zinc on the surface of steel is actually because the steel plate is easily oxidized by oxides such as water in the air and thus corroded. In fact, it is also coated with zinc to better protect the steel. Galvanized coil has two major advantages, one is adhesion and the other is weldability. It is precisely because of these two advantages that they have been widely used in the fields of construction, industry, automobile industry and commerce. Another important feature is the corrosion resistance, which can have a good effect on the manufacture of housings for home appliances.
