Why are consumers now choosing hot-dip galvanized steel pipes?
Cold galvanized steel pipe has been banned by the state. The reason for the ban is that the cold galvanized steel pipe cannot meet the requirements in the production process and cannot achieve the effect it should have in its range of use.
Cold galvanizing is electrogalvanizing, and the amount of galvanizing is very small, only 10-50g / m2, and its own corrosion resistance is much worse than that of hot-dip galvanizing pipe. In order to ensure quality, regular galvanized pipe manufacturers do not use galvanized (cold plating). Only small companies with small and obsolete equipment use electrogalvanizing, of course, their prices are relatively cheaper.
Hot dip galvanized steel:
It can be clearly seen from the production process that the hot-dip galvanized steel pipe reacts the molten metal with the iron substrate to generate an alloy layer, thereby combining the substrate and the plating layer. 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, it is washed in an ammonium chloride or zinc chloride aqueous solution or a mixed aqueous solution of ammonium chloride and zinc chloride, and then sent to the tank. Hot dip plating bath. Hot-dip galvanizing has the advantages of uniform coating, strong adhesion, and long service life.