The current military specification for heavy phosphate coatings, MIL-DTL-16232, mandates the
use of a hexavalent chromium final rinse for performance. Numerous non-hexavalent chromium rinses
have been evaluated to date and none have provided performance comparable to hexavalent chromium.
This paper will discuss the testing of additional non-hexavalent chromium final rinses and their
corresponding performance.