What are the production processes of galvanized steel wire rope? [answered]

Electro galvanizing is to obtain the coating by electrodeposition through external power supply. The obtained coating is composed of fine pure zinc grains. Cold galvanizing (or electro galvanizing) is zinc plated by electroplating or other methods at room temperature. Theoretically, zinc layer of any thickness can be obtained by electro galvanizing. At present, the amount of zinc on the practical electroplating zinc can reach 1200g / m2. Generally, the amount of zinc on the electroplated zinc layer can also reach 750g / m2.

Hot dip galvanizing is to form the coating by physical thermal diffusion. Firstly, iron zinc compound is formed, and then pure zinc layer is formed on the surface of iron zinc compound. The high value of zinc on hot-dip galvanizing is only 593g / m2. Hot dip galvanizing will reduce the mechanical properties of steel wire. Galvanized steel wire rope with high strength and high corrosion resistance is mostly twisted by electro galvanized steel wire. Hot dip galvanizing is zinc plating in a molten zinc bath at 450-480 degrees.

The essential difference between hot-dip galvanized steel wire rope and cold-dip galvanized steel wire rope is that the zinc layer of hot-dip galvanized steel wire rope has better corrosion resistance due to the zinc iron alloy layer compared with cold-dip galvanized steel wire rope. The surface state of hot-dip galvanized steel wire rope should be a little black because it is hot-dip galvanized with zinc iron alloy. The electroplated surface has no chemical reaction, so it is still the natural color of zinc and looks brighter. Generally, the zinc layer of hot-dip galvanizing is thicker and the corrosion resistance is better. The zinc layer of electro galvanizing is thinner and the corrosion resistance is worse.