Galvanized coil its demand in the first half of the year in about 4 million tons, equivalent to 180,000 tons of refined zinc consumption. There is also from the consumption of galvanized steel in the home appliance industry, air conditioning is the main consumption of galvanized steel products. Air conditioning indoor unit back plate, cabinet machine back plate, internal parts, outdoor unit shell and internal, etc. have galvanized sheet manufacturing, cold rolled coil refers to the steel coil obtained after rolling through the cold rolling mill, or known as cold hardened coil.
In practice, people usually refer to steel coils that have been treated after rolling in a cold rolling mill and in the next process collectively as cold rolled coils. The organic coating on the zinc layer serves as a cover to prevent rusting of the steel sheet, and the service life is longer than that of galvanized steel, and it is reported that the service life of the coated steel sheet is 50% longer than that of galvanized steel. The service life is longer when it is often washed by rainwater.
The use is affected by the action of sulfur dioxide gas, salt and dust. Therefore, when designing, if the slope of the roof is greater, the less likely it is to accumulate dust and other dirt, and the longer its service life; for those areas or parts that are not subject to frequent rainwater flushing, they should be flushed with water on a regular basis. Buildings or plants made of color-coated steel sheets have a longer service life when they are regularly washed by rainwater. Color-coated galvanized steel sheets (commonly known as color plates), stamped and coated galvanized steel sheets, PVC laminated galvanized steel sheets, and so on.
In addition, galvanized steel sheets can be classified by use into general use, roofing use, building exterior panels, structural use, tile ridge panels, tensile use, and deep-drawing use. General tin packaging, lined with moisture-proof paper, outside the iron waist tied, tied securely to prevent the inner gavanized sheet friction with each other.
