Painting Galvanized Pipe

How do you prep and paint galvanized pipe.

Painting galvanized pipe.

The choices of paint for galvanized metal will depend upon both the application and service environment. Galvanized steel is a great material to use for a variety of tools products and projects and it s environmentally friendly. Therefore it s important to follow the correct procedure when painting galvanized. The oil will need to be removed before painting.

The best way to paint a galvanized pipe is to prep the surface with a trisodium phosphate mix. To test for the presence of passivators sand down an inconspicuous spot on the finish and swab it and the surrounding area with copper sulfate diluted with water. Beside this the zinc content of the galvanized coating reacts with paint s binder to create a film that causes the paint to peel source. Galvanized steel surfaces are sometimes treated with chemicals called passivators which protect the exterior from corrosion but can complicate painting.

Clean new pipes with a thinner or solvent and apply a primer. When painting galvanized steel all paint systems used should be specifically formulated for use on galvanized steel and applied in accordance with the paint manufacturer s recommendations. Process for painting galvanized steel. Joel w parham gainesville texas.

Galvanized steel is coated with a thin layer of oil and passivator that protects it from water and weather damage. Spray painting galvanized metal do it yourself knowledge sep 16 2009 november 10 2010 at 11 26 am. Use water based paints made for metal. That s great for preventing rust but it.

Galvanized water pipes are coated with zinc and oil. An earlier visitor to the site reported that cleaning with a scrub brush and tri sodium phosphate took care of the prep work. In fact roughly 69 of steel is recycled in north america each year. A discussion started in 2002 but continuing through 2020.