Hot dip galvanizing of pipe fittings - Video

The galvanizing process for pipe fittings is a method of preventing corrosion by coating the surface of steel pipes with a zinc layer. Detailed steps of the hot-dip galvanizing process:

I. Hot-dip galvanizing process

1. Preparation:

-Cleaning: Remove impurities such as oil, dust, etc. from the surface of the pipe fittings.

-Pickling: Use an acidic solution to remove the oxide scale and rust on the surface.

-Water washing: Rinse the pipe fittings with clean water to remove the residue after pickling.

2. Plating treatment:

-Immersing the galvanizing agent*: Immerse the pipe fittings in the galvanizing agent solution to enhance the adhesion of the zinc layer.

3. Drying:

-Drying: Dry the pipe fittings in a drying furnace to ensure that there is no moisture on the surface.

4. Galvanizing:

-Hot-dip galvanizing: Immerse the pipe fittings in molten zinc liquid to evenly coat the surface with a layer of zinc.

5. Cooling and passivation:

-Cooling: Cool the galvanized pipe fittings in water or air.

- Passivation: Through chemical treatment, a protective film is formed to further prevent the zinc layer from oxidation.