Galvanizing is a surface treatment technique that involves plating a layer of zinc on the surface of a metal, alloy or other material to provide aesthetic appeal and rust prevention. Nowadays, the main method is hot-dip galvanizing.　　

In recent years, with the development of the galvanizing process, high-performance galvanizing brightening agent, galvanizing has been from purely protective purposes into the protective-decorative applications.

There are two types of galvanizing solutions: cyanide plating solutions and cyanide-free plating solutions. Cyanide plating solution is divided into microcyanide, low cyanide, medium cyanide, and high cyanide categories. Cyanide-free plating solution has alkaline zincate plating solution, ammonium salt plating solution, sulfate plating solution and no ammonia chloride plating solution. Galvanizing plant cyanide zinc plating solution are plating ability is good, the plating layer obtained smooth and meticulous, in the production of long-term use. However, due to the cyanide toxicity, serious environmental pollution, in recent years has tended to use low-cyanide, micro-cyanide, cyanide-free galvanizing solution.