Hot Dipping Galvanizing
Hot galvanizing involves dipping in heated and melted zinc solution; it has a fast production rate, though the coating is thick but uneven. The acceptable thickness on the market is 45 microns, with the maximum reaching over 300 microns. The color is darker, and it consumes a large amount of zinc metal.
Base metalA penetration layer is formed, with good corrosion resistance in outdoor environments.
Hot Dipping GalvanizingIt can last for decades.
Scope of hot-dip galvanizing applications:
Due to the thick coating obtained,
Hot Dipping GalvanizingIt offers better protective properties compared to electroplated zinc, thus serving as an important protective coating for steel components in harsh working environments. Hot-dip galvanized products are widely used in industries such as chemical equipment, petroleum processing, marine exploration, metal structures, power transmission, and shipbuilding. In the agricultural sector, they are applied in pesticide irrigation, heating systems, and in construction for water and gas distribution, wire insulation,
scaffoldIn areas such as bridges and highway guardrails, these have been widely adopted.
Cold galvanizing
Cold galvanizing(electroplating zinc) is in
Plating tankThe unidirectional current within enables zinc to be gradually coated with a metallic surface. The production rate is slow, the coating is uniform, and the thickness is relatively thin—usually only 3–15 micrometers. The appearance is shiny, but the corrosion resistance is poor; it typically rusts within a few months.
Difference between cold galvanizing and hot galvanizing:
The difference between cold galvanizing and hot galvanizing lies in the amount of zinc applied. They can be identified by color—cold galvanizing has a shiny silver-white appearance with a yellow tint, while hot galvanizing appears white.
