Hot dip galvanized pipe
Is to make the molten metal and iron substrate reaction and produce alloy layer, so that the substrate and the coating two. Hot dip galvanizing is first to pickling steel pipe, in order to remove iron oxide in the surface of steel, pickling, by ammonium chloride or zinc chloride aqueous solution or ammonium chloride and chloride zinc mixed aqueous solution groove cleaning is then fed into hot dip tank. Hot dip galvanized coating with uniform, strong adhesion, long service life, etc.. Most of the northern process using zinc galvanized with direct rolling process.
Cold galvanized pipe
Cold galvanizing is electric galvanized, galvanized amount is very few, only 10 - 50g/m2, the corrosion resistance of its own specific heat galvanized pipe is a lot of difference. Regular galvanized pipe manufacturers, in order to ensure the quality, most do not use electric galvanized (Leng Du). Only those small, old equipment used in small enterprises, of course, their prices are relatively cheaper. Future use of cold galvanized pipe for water, gas pipe.
Hot dip galvanized steel tube
The complex physical and chemical reactions of the steel tube matrix and the molten bath have formed the structure of corrosion resistant. Alloy layer is integrated with the pure zinc layer and the steel tube. Therefore, its corrosion resistance.
Cold galvanized steel pipe
The zinc layer is the plating layer, the zinc layer and the steel tube substrate independent layer. The zinc layer is thin, and the zinc layer is attached to the steel tube, which is easy to fall off. Therefore, its corrosion resistance. In the new housing, the use of cold galvanized steel pipe as a water pipe.
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