Hot dip galvanized square pipe: it is a square pipe made by welding after the use of steel plate or steel strip crimped forming, and on the basis of the square pipe placed in the hot dip galvanized pool after a series of chemical reactions and formed a square pipe.The production process of hot galvanized square tube is relatively simple, and the production efficiency is very high, and the variety of specifications are many. This kind of square tube requires little equipment and capital, which is suitable for the production of small galvanized square tube manufacturers.But in terms of strength, the strength of this steel tube is much lower than that of seamless square tube.

Hot dip galvanized pipe is to make molten metal and iron matrix reaction to produce alloy layer, so that the substrate and coating two combined.Hot dip galvanizing is to pickle the steel pipe first. In order to remove the iron oxide on the surface of the steel pipe, after pickling, it is cleaned by ammonium chloride or zinc chloride aqueous solution or ammonium chloride and zinc chloride mixed aqueous solution tank, and then sent into the hot dip plating tank.Hot dip galvanizing has the advantages of uniform coating, strong adhesion and long service life.The complex physical and chemical reactions between the matrix of hot dip galvanized steel tube and the molten bath result in the formation of a tight corrosion resistant zinc-ferroalloy layer.The alloy layer is integrated with pure zinc layer and steel tube matrix, so it has strong corrosion resistance.