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　　Welded steel pipe with hot dip or galvanized layer on the surface of galvanized steel pipe. Galvanized Steel Pipes can increase the corrosion resistance of steel pipe and prolong its service life. Galvanized Steel Pipes are widely used in petroleum industry, especially in offshore oil fields, oil wells, pipelines, oil heaters, condensation coolers, coal distillation oil wash exchangers, trestle pipe piles and support pipes for mine tunnels.

　　Hot-dip 2.5 Inch Galvanized Steel Pipes is to make molten metal react with iron matrix to produce alloy layer, so that the matrix and coating can be combined. Hot-dip Galvanized Steel Pipes is a process of pickling steel pipes. In order to remove iron oxide from the surface of Galvanized Steel Pipes, after pickling, the pipes are 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 Galvanized Steel Pipes. Hot-dip Galvanized Steel Pipes has the advantages of uniform coating, strong adhesion and long service life. Hot-dip Galvanized Steel Pipe Matrix Complex physical and chemical reactions occur with the molten plating solution to form a zinc-iron alloy layer with corrosion-resistant structure. The alloy layer is integrated with pure zinc layer and steel pipe matrix, so it has strong corrosion resistance.

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Next: Performance of Galvanized Square Hollow Sections

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