Galvanized pipe is a common steel equipment, its excellent function is loved by customers. Galvanized steel pipe, also known as galvanized steel pipe, is divided into hot-dip galvanizing and electro galvanizing. The hot-dip galvanizing has the advantages of uniform coating, strong adhesion and long service life. The cost of galvanizing is low, the surface is not very smooth, and its corrosion resistance is much worse than that of hot-dip galvanized pipe. Jinan galvanized pipe to introduce its classification to you. You can learn by reference!
Jinan galvanized pipe
1. Hot dip galvanized steel pipe
The matrix of steel pipe and molten plating bath have disordered physical and chemical reactions, forming a zinc iron alloy layer with tight corrosion resistance structure. The alloy layer is integrated with pure zinc layer and steel pipe matrix. Therefore, it has strong corrosion resistance.
2. Cold galvanized steel pipe
Zinc layer is electroplated layer, and the zinc layer is separated from the steel pipe matrix. The zinc layer is relatively thin, and the zinc layer is slightly attached to the steel pipe substrate and slightly falls. Therefore, its corrosion-resistant function is poor. In the newly-built residence, it is forbidden to use the cold galvanized steel pipe as the water supply pipe.
3. Hot dip galvanized pipe
Is to make the molten metal and the iron matrix react and attack the alloy layer, so that the matrix and the coating are combined. Hot dip galvanizing is to pickle the steel pipe first, in order to remove the iron oxide on the surface of the steel pipe, after pickling, the steel pipe shall be cleaned by ammonium chloride or zinc chloride aqueous solution or the mixture of ammonium chloride and zinc chloride aqueous solution tank, and then sent to the hot dip galvanizing tank. Hot dip galvanizing has the advantages of uniform coating, strong adhesion and long service life. Cold galvanizing is galvanizing, the amount of galvanizing is very small, only 10-50g / m2, its corrosion resistance is much different from that of hot galvanizing pipe. Regular galvanized pipe manufacturers, in order to ensure the quality, most do not choose galvanizing (cold plating). Only those small enterprises with small planning and old equipment need to choose galvanizing, of course, their prices are relatively low. In the future, it is forbidden to use cold galvanized pipes as water and gas pipes.