The hot plating wire can generate a thicker coating, and there are both pure zinc layer and iron-zinc alloy layer, so the corrosion resistance is good. The production power of hot dip galvanizing is particularly high, and the stay time of the parts in the hot dip galvanizing tank is usually not exceeded. Compared with electrogalvanizing, hot-dip galvanizing has lower production cost and less impact on the environment than electroplating. When plating plates, belts, wires, tubes and other profiles, the degree of automation is high.
“Wet” hot dip galvanizing is also called “molten solvent method” hot dip galvanizing. After the steel workpiece is degreased, pickled and cleaned, it is necessary to pass the “molten solvent” (also known as the co-solvent) in a special tank set above the molten zinc surface, and then enter the zinc solution to remove the zinc plating. The molten solvent is usually a mixture of ammonium chloride and zinc chloride, but other chlorine salts are also added.
“Dry” hot dip galvanizing is also called “drying solvent method” hot dip galvanizing. Iron and steel workpieces through degreasing, pickling, cleaning, dipping aid solvent and after drying, then immersed in the molten zinc solution to galvanize. The co-solvent is usually hydrochloric acid, ammonium chloride, or a mixture of ammonium chloride and zinc chloride.
Scope of use: Because the resulting coating is thicker, hot-dip galvanizing has very good protective function than electric galvanizing, so it is an important maintenance coating for steel parts in strict working environment. Hot-dip galvanized products are widely used in chemical equipment, petroleum processing, Marine exploration, metal structure, electricity transportation, shipbuilding and other occupations, in the agricultural field such as pesticide irrigation, heating and construction such as water and gas transport, wire bushings, scaffolding, Bridges, highway guardrail, etc., these years have been a large number of selected.
Post time: 20-12-23