At present, hot-dip galvanized products mainly include steel plates, steel strips, steel wires, steel pipes, etc., among which hot-dip galvanized steel plates account for the largest proportion. Hot-dip galvanizing has developed rapidly in the past few decades due to its good anti-corrosion performance, and is widely used in automobiles, construction, home appliances, chemicals, machinery, petroleum, metallurgy, light industry, transportation, electric power, aviation and marine engineering. . However, the hot-dip galvanizing process will cause serious pollution during the anti-corrosion process. Hot-dip galvanizing will produce a lot of irritating gases such as NH3HCL and dense smoke of NH4CL before the galvanizing of the workpiece. During the galvanizing process, a large amount of metal vapor and oxide dust will be generated, and a large amount of zinc ash and zinc slag will be accompanied, which wastes resources and pollutes the environment.
Cold galvanizing, also known as electro-galvanizing, is the process of using electrolysis to form a uniform, dense, and well-bonded metal or alloy deposition layer on the surface of the workpiece: the surface-treated steel is put into the galvanizing bath and passed Electric current, the zinc ions in the potion are reduced to zinc, and they are evenly and thinly coated on the steel plate. All corners of the steel or components are very uniform and will not be missed. All the coating thicknesses are the same. The purpose of electro-galvanizing is to prevent steel objects from being corroded, improve the corrosion resistance and service life of steel, and at the same time increase the decorative appearance of the product. Electro-galvanized has the following characteristics：