Galvanized seamless steel pipe are generally hot-dip galvanized, with a thick galvanized layer, so the corrosion resistance is stronger and the service life is longer. With the improvement of building quality, the service life and strength requirements of the piping system also increase. The product often replaces galvanized steel pipes and is used in pipeline systems that require higher requirements for fire fighting, air conditioning, and other circulating water and gas medium transportation.
The "galvanized" coating is uniform and has strong adhesion, but this is not a simple process similar to applying skin care products on the face. Hot-dip galvanizing involves pickling the welded steel pipe first. In order to remove the iron oxide on the surface of the steel pipe, after pickling, it is cleaned in a tank with ammonium chloride or zinc chloride aqueous solution or a mixed aqueous solution of ammonium chloride and zinc chloride, and then sent Into the hot dip plating tank.
The hot-dip galvanized steel pipe matrix undergoes a complex physical and chemical reaction with the molten plating solution to form a corrosion-resistant zinc-iron alloy layer with a compact structure. The alloy layer is integrated with the pure zinc layer and the steel pipe matrix.