The coating process starts with proper surface preparation of the parts by immersing them in a series of chemicals. Phosphate and lube coating of parts are performed to facilitate cold forming operations. Phosphate coating also produces base for rust preventive material. Phosphate and lube coating is suitable for several types of low carbon and low alloy steels.
Zinc phosphate coated material can also be dipped in oil to create a protective layer on the steel. This provides rust prevention for an extended period.