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Phosphate


Phosphate coatings appear light gray to black depending on the process used. Phosphate is a excellent base for paint, and when when combined with a class 2 oil coating, it has good corrosion resistance.
Specification Comments
DOD-P-16232 F  
Type Z Zinc Phosphate base.
Type M Manganese phosphate base.
  Class 1 Supplementary preservative treatment or coating, as specified.
  Class 2 Supplementary treatment with lubricating oil conforming to MIL-L-3150
  Class 3 No supplementary treatment
  Class 4 Chemically converted (may be dyed to color as specified). With no supplementary coating, or supplementary coating
as specified