Galvanized pipe is a commonly used steel equipment. Its excellent function is loved by many customers. Galvanized pipe, also known as galvanized steel pipe, divided into hot galvanizing and galvanized two kinds, galvanized zinc coating thickness, with uniform coating, strong adhesion, long life and other benefits. Zinc plating costs low, the surface is not very smooth, its corrosion resistance is much worse than that of hot dip galvanized pipe. Xiaobian, a manufacturer of galvanized pipes in Ji'nan, will give you an introduction to its classification.
1. The physical and chemical reactions of the hot galvanized steel pipe and the molten bath are mixed, forming a corrosion-resistant zinc iron alloy layer. The alloy layer is integrated with the pure zinc layer and the steel tube substrate. Therefore, its corrosion resistance is strong.
2. The zinc layer of cold galvanized steel pipe is the electroplating layer, and the zinc layer is separately separated from the steel tube substrate. The zinc layer is thinner, and the zinc layer is simply attached to the steel tube substrate, and it falls slightly. So its corrosion resistance is poor. In the new residence, the cold galvanized steel pipe should be prevented from being used as the water supply pipe.
3, hot-dip galvanized pipe is to make molten metal react with the iron substrate and attack the alloy layer, so that the substrate and the coating two are combined. The hot dip galvanizing is first to wash the steel tube, in order to remove the iron oxide on the surface of the steel tube. After pickling, it is cleaned by the ammonium chloride or zinc chloride solution or the mixed solution of ammonium chloride and zinc chloride, and then sent into the hot dip bath.
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