Zinc, Manganese & Iron Phosphate Coatings PHOSPHATE COATINGS
Phosphate coatings consist of crystalline, non-reflective, water insoluble metal phosphates that are very adherent to the base metal. Phosphate coatings are measured by coating weights such as g/m2 or mg/ft2. They can be associated in three main categories:
- Heavy zinc phosphate that has the ability to retain rust inhibiting oils, preservatives, or other specified finishes. MIL-DTL-16232, Type Z
- Lighter zinc phosphate has a smoother crystal structure and is normally not oiled as it is used as a base for paint.
- DOD-DTL-16232, Type Z
- TT-C-490, Various Types and Methods
- DOD-P-50002, Type Z
IRON PHOSPHATES & PROPRIETARIES
- Chosen for wear resistance and the ability to retain oils.
- DOD-DTL-16232, Type M
- DOD-P-50002, Type M
- Utilized as a paint or powder coating base.
- There are numerous proprietary phosphate baths within each group that meet specific part requirements.
Peninsula Metal Finishing, Inc. currently offers Zinc and Manganese Phosphates