Phosphate Coating Services

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Phosphate conversion or phosphating is the chemical and electro-chemical process of creating a layer of crystalline phosphates during the surface preparation stage of steel.

Phosphate conversion coatings are typically formed with zinc, iron, or magnesium phosphate salts that are dissolved in phosphoric acid. When the coating is applied or immersed to steel, the chemical reaction depletes the hydronium ions, raises the pH, and causes the dissolved salt to fall out of the solution and precipitate on the surface.