The fabric air duct ventilation duct is to prevent the surface of the steel plate from being corroded and increase its service life. The surface of the steel plate is coated with a layer of metal material zinc. This type of zinc-coated steel plate is called galvanized plate. And production and processing methods can be divided into the following categories: ① hot-dip fabric duct ventilation duct. The thin steel sheet is infiltrated into the molten zinc bath, so that the surface of the sheet is adhered with a layer of zinc. At this stage, the key is to use continuous hot-dip galvanizing process for production, that is, the coiled steel plate is continuously immersed in a zinc-melted plating tank to make a fabric air duct ventilation pipe; ② fine-grain reinforced fabric air duct ventilation pipe. This type of steel plate is produced by the hot dip method, but immediately after it is out of the tank, it is heated to about 500 ° C to convert it into an aluminum alloy plastic film of zinc and iron. This type of galvanized sheet has excellent adhesion of architectural coatings and electric welding; ③ electric fabric air duct ventilation duct. The production of such fabric air duct ventilation ducts by electroplating has excellent process performance. However, the coating is thin, and the corrosion resistance is not as good as that of the hot-dip galvanized sheet; Single and double-sided fabric duct ventilation ducts, that is, goods that are hot-dip galvanized on one side only. In electric welding, spraying, rust prevention, production and processing, etc., it has better adaptability than double-sided galvanized sheet. In order to get rid of the defect of uncoated zinc on both sides, there is another kind of galvanized sheet coated with chromatographic zinc on the other side, that is, galvanized sheet with difference on both sides; This is made of zinc and other metal materials such as aluminum, lead, zinc, etc. to make aluminum alloys or even composite plated steel plates. This type of steel plate not only has extraordinary anti-rust treatment characteristics, but also has excellent spraying characteristics; in addition to the above five, there are also colorful fabric air duct ventilation ducts, clothing printing sprayed fabric air duct ventilation ducts, and polyethylene laminated fabric air duct ventilation ducts. tube etc. But at this stage, the most common is still hot-dip galvanized sheet. Fabric duct sheet is generally a general term for a common plate flange duct to a fabric duct sheet and an acid-resistant steel plate. Fabric duct sheet refers to a steel plate that is resistant to erosion by weak substances such as air, steam and water, while acid-resistant steel plate refers to a steel plate that is resistant to corrosion by organic chemical corrosive substances such as acid, alkali, and salt. According to the production method, it is divided into hot rolling and cold The two kinds of tie, the surface of the fabric duct sheet is smooth, has high plastic deformation, ductility and impact toughness, and is resistant to corrosion by acid, alkaline vapor, aqueous solution and other substances. This is a carbon steel that is not easy to rust, but not absolutely rust-free
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