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phosphate coating line
General Description

A series of chemical reactions between the base metal and a chemical base solution result in the formation of a phosphate barrier layer. There are many types of phosphate coatings each of which has inherent specific qualities. The function of these coatings is to:

  1. Provide a corrosion resistant barrier.
  2. Provide a base to allow the part to improve its oil or wax adhering ability.
  3. Provide a base for subsequent coatings.
  4. Aids in break-in of moving parts.

Zinc and maganese phosphate provide heavier/coarser coatings ranging from 1000 to 4000 mg/ft2. This type of pre-treatment can be used for the majority of applications such as paints, adhesives, dry film lubricants to name a few. Iron phosphate and micro zinc phosphates are used where tighter tolerances must be maintained. Coating weights usually would run between 30 to 600 mg/ft2 minimizing the base barrier thickness and providing a smoother surface.

Parts Finishing's phosphate lines are able to apply Light, Medium, and Heavy Zinc Phosphate. These lines can also apply manganese phosphate, black phosphate, phosphate & oil, and pickle and oil.