Compared to other phosphate coating types, a high concentration bath is prepared and high values are maintained. Coating weight formed on metal is usually between
15-35 g/m². After phosphating, the parts goes in protective oil bath. Protective oil selection is important to obtain high corrosion resistance.
During the preparation and operation of protective zinc phosphating baths, total acid, free acid, temperature, iron point values should be checked, and regular additions should be made according to the results obtained.