Cold-dip galvanizing refers to electroplating, and hot-dip galvanizing refers to the zinc plating of
steel pipes in molten zinc. The difference between the two is that the former has poor corrosion resistance, while the latter has good corrosion resistance.
The hot-dip galvanized steel pipe is dip-coated in a heated and melted zinc solution, and the galvanized pipe is passed through the unidirectional current in the electroplating tank to gradually coat the zinc on the metal surface. The production speed of the hot-dip process is fast, the coating is thick, and the consumption of zinc metal is large. Ordinary galvanizing is slow and the coating is thin.
Hot-dip galvanizing can be maintained for decades, and it is in an outdoor environment. As long as the steel structure exposed to the air is not too large, it is all this process.
The cold galvanizing process is used to protect metals from corrosion. For this purpose, a coating of zinc filler is used. It is applied to the surface to be protected by any coating method. After drying, a zinc filler coating is formed. The dry coating Has a high content of zinc (up to 95%). Suitable for repair work (i.e. during repair work, only where the protected steel surface has been damaged, it can be reapplied as soon as the surface has been repaired). The cold galvanizing process is used for the anticorrosion of various steel products and structures.
