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Hot dip galvanized square pipe characteristics1 hot dip galvanized square pipe zinc coating is thick, dense and uniform and non porous, good corrosion resistance;2 hot dip galvanized square pipe: the zinc plating layer is pure, corrosion in acid and alkali mist is slow,can effectively protect the steel substrate;3 hot dip galvanized square pipe zinc coating chromate and form white, color, army green, beautiful and generous, and has a certain decorative properties;4 hot dip galvanized square pipe due to zinc coating has good ductility, you can make cold punching, rolling, bending molding without damaging the coating. Hot dip galvanized pipe applicationGalvanized square pipe is a special cross section hollow, it is also for this special design makes the pipe application in our lives has a lot of expansion. Especially in our shipbuilding and construction industry, at the same time in the military, aerospace field also has the very big development, especially for seamless steel pipe. It is also widely used in glass curtain wall, some of the power tower, some of the communications network, because of hot dip galvanized pipe is with good insulation performance, therefore, also used in some wire casing, it has high strength, so the construction of the bridge can’t live without it and the metal structure, and so on, and the main function of which is to make the galvanized square pipe service life and corrosion resistance improved, which also makes the performance of galvanized pipe has been further improved, and the galvanized layer is good or bad is directly affect the quality and price.In the practical process, as the forming process of hot dip zinc layer is also the forming process of iron-zinc alloy between the iron substrate and the pure zinc layer of iron, the workpiece surface formed in hot dip plating of iron - zinc alloy layer, and makes good combination between iron and pure zinc layer, the process can be simply described as follows: when the blacksmith a immersed in molten zinc liquid, in the first place in the interface on the formation of zinc and iron solid solution. This is base metal iron containing zinc atoms in solid state form a crystal, is the fusion between two metal atoms, atoms between gravity is small. So when zinc in solid solution after reaching saturation, two kinds of zinc iron atom diffusion, spread to the iron matrix of zinc atom in the lattice matrix migration, gradually formed and iron alloy, and spread to molten zinc liquid iron and zinc in the formation of intermetallic compounds FeZn13, sank into the hot dip galvanized pot is zinc slag. When removing from the leaching liquid zinc workpiece surface form pure zinc layer, to the six-party crystals. If you want to improve the quality of the galvanized pipe, must reduce the iron content in liquid zinc or reduce the zinc slag, starting from the factors of reducing iron dissolved.
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