Galvanized square tube production | well-known hot-dip galvanized steel square tube 1000-election | Zhangjiakou galvanized square tube

 Redu Rectangular Pipe protective properties of electro-galvanized zinc coating thickness is usually 5 ~ 15μm square galvanized pipe material, and hot-dip galvanizing layer typically 35μm or more, even up to 200μm. HDG coverage is good, dense coating, no organic matter mixed. It is well known mechanism of resistance to atmospheric corrosion of zinc electrochemical mechanical protection and protection under conditions of atmospheric corrosion of zinc coating surface ZnO, Zn (OH) 2 and basic zinc carbonate protective film galvanized pipe, to a certain extent slowed Zinc corrosion, this layer of protective film (also called white rust) will be destroyed to form a new film. When the zinc layer serious damage, threatening to iron matrix, the matrix produces zinc electrochemical protection, the standard potential -0.76V zinc, iron standard potential -0.44V supply galvanized square tube, zinc and iron to form micro-zinc battery As the anode is dissolved iron as the cathode is protected. Clearly galvanized for resistance to atmospheric corrosion of the base metal is better than galvanized iron. Rectangular galvanized pipe is a pipe called a square and rectangular tubing, which is the side of the pipe, etc. looks. After treatment process is rolled strip made. The general is to strip after unpacking, smooth, curl, tube welding to form, and then rolled into the square tube by tube and then cut into the required length. Typically 50 per pack. Also known as cold-formed square and rectangular hollow sections, referred to square tubes and rectangular tubes, code-named F and J 1, galvanized square steel tube wall thickness tolerances, when the wall thickness of not more than 10mm shall not exceed the nominal wall thickness of the positive minus 10 percent, plus or minus 8% excluding galvanized square tube model, corners and wall thickness of the wall thickness of the weld area when the wall thickness greater than 10mm. 2, usually galvanized Rectangular Pipe length delivery to 4000mm-12000mm, to 6000mm and 12000mm majority. Rectangular Pipe allow the delivery of not less than 2000mm length short foot and non-product, can also be delivered in the form of a mouthpiece, but the demand side should be used in the removal of the mouthpiece. Short foot and non-weight product length does not exceed 5% of total deliveries, for theoretical weight greater than 20kg / m square and rectangular tube should not exceed 10% of total deliveries. 3, square and rectangular tube bending galvanized per meter shall not be greater than 2mm, the total curvature is not greater than 0.2% of the total length. Galvanized square tube production | well-known hot-dip galvanized steel square tube 1000-election | Zhangjiakou galvanized square tube provided by the Tianjin Steel Pipe Co., Ltd. Rong thousand. 1000-Tianjin Steel Pipe Co. (www.tjqrgg.com) is Tianjin, steel leader, over the years, the company is implementing the scientific management, innovation and development, the principle of honesty and trustworthiness, and satisfy customer needs. In the 1000-pipe leading the staff warmly welcome all inquiries negotiations to create the 1000-pipe a better future.