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The Process of Hot Dip Galvanizing Method

There are a few methods used to galvanize steel, but in the steel pipe industry, the most relevant method is continuous “hot dip” galvanizing.

Hot dip galvanizing is a straightforward process. The steel is first chemically cleaned or cleaned via sandblasting. Then, the steel is pickled to remove mill scale. A flux, often zinc ammonium chloride, is applied to the steel to prevent flash rusting. Following this step, the steel is dipped into a molten zinc bath. The molten zinc bonds to the iron in the steel, thus creating a protective coat on each surface of the steel. The zinc-coated steel is quenched in a cooling tank and re-stenciled once cooled. The outer layer will not crack, flake or peel when a steel sheet is spun into a finished part.