Historical
SAE AMS 2481H-2009 (SAE AMS2481H-2009)
Phosphate Treatment Antichafing
This specification covers the requirements for a manganese phophate coating on ferrous alloys. This process has been used typically to produce a coating that will minimize chafing of contacting steel surfaces and retain an oil film, but usage is not limited to such applications.
Society of Automotive Engineers [sae]