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 |
|
