Electro-galvanized (see wire electro-galvanized) is obtained by electrodeposition by means of an external power supply, and the obtained coating is composed of fine pure zinc crystal grains. Hot-dip galvanizing (see steel wire hot-dip galvanizing) is to form a coating by physical thermal diffusion, first forming an iron-zinc compound, and successively forming a pure zinc layer on the surface of the iron-zinc compound. In theory, electroplated zinc can obtain a zinc layer of any thickness. At present, the amount of zinc on electroplated zinc can reach 1200g/m2. Generally, the amount of zinc on the electroplated zinc layer can also reach 750 g/m2. The highest amount of zinc on hot-dip galvanizing is only 593g/m2. . Hot-dip galvanizing will reduce the mechanical properties of steel wire, and require high-strength and high-corrosion galvanized steel wire rope, which is mostly made of electro-galvanized steel wire.