NEW Phosphate Coating – A pre-top coat service to help further prevent future corrosion…

What Does Phosphating Mean?

Phosphating is a process of coating conversion that is typically used as a pretreatment method in combination with another corrosion protection technique for steel or iron components. This involves immersing the component in a dilute solution that converts the surface of the metal into a microscopic layer of phosphate crystals. The phosphate coating usually consists of iron, zinc, or manganese crystals and is typically applied to carbon steel, low-alloy steel, and cast iron. To form the coating, a solution of iron, zinc, or manganese phosphate salts in phosphoric acid is applied either by spraying it onto the substrate or immersing the substrate in the solution. When steel or iron parts are placed in the phosphoric acid, it causes a reaction that locally depletes the hydronium (H3O+) ions, raises the pH, and causes the dissolved salt to fall out of the solution and precipitate onto the surface. The acid and metal reaction also creates iron phosphate may be deposited.