- Aug 20, 2018 -
Alkaline galvanizing is a zinc-based cadmium-free galvanizing process. The basic components are sodium hydroxide and zinc oxide. The main function is electroplating additives. If these additives are not available, it is necessary to plate qualified products. impossible. From the development to the use of DPE, DE and other processes. Nowadays, there are many kinds of alkaline galvanizing processes introduced from abroad, which are comparable to cyanide galvanizing in terms of dispersing ability, toughness of coating and brightness.
Another series that has matured from the development of cyanide-free galvanizing technology is chloride weak acid galvanizing, which is a galvanizing process based on bright additives, which is divided into two types: ammonium salt and potassium salt. It is already very popular in China. In particular, most of the barrel plating uses a potassium chloride galvanizing process. The luminosity of potassium salt is very high, but the dispersing ability is worse than that of alkaline, and the passivation performance after plating is slightly inferior to that of alkaline galvanizing, and the brittleness is slightly larger. However, it is still a process that is widely used in daily metal plating.
There is also a sulphate galvanizing process, which is also a product of advances in electroplating additive technology. The sulphate galvanizing process is almost always used in the wire electroplating industry.
Since the cyanide-free galvanizing process has many processes and is already a mature process, it can replace the original cyanide plating process. For simple products, the chloride plating is fine. For better dispersion performance, alkaline zinc plating such as zincate can be used. The wire or casting can be selected to be galvanized with sulfate.