NPFC - MIL-P-16232
PHOSPHATE COATING, HEAVY, MANGANESE OR ZINC BASE
|Publication Date:||24 May 1966|
This specification covers heavy phosphate coatings for ferrous metals applied by immersion. The coatings consist of a manganese phosphate or zinc phosphate base and, when specified, a supplementary treatment.
The phosphate coatings covered by this specification are "heavy" coatings. Light phosphate coatings used as a paint base are covered by other specifications, such as TT-C-490.