Since 1998, ASTM A967 has been the most widely accepted general industry standard for passivating stainless steel. The standard came into being after the U.S. Department of Defense withdrew QQP 35C, which replaced the QQP 35 standard that was developed in the 1930s.

ASTM A967 allows for the nitric acid and citric acid solutions, the latter of which is the newer, more effective method. The standard prescribes the concentrations, temperatures, times and water quality required for the passivation of stainless steel. A second standard, known as AMS 2700 B, is accepted in the aerospace industry. AMS 2700 B is virtually identical to ASTM A967.

RPA passivates in accordance to ASTM A-967-05.7 (7.1.1 thru 7.1.1.5) and rinse 7.2 testing is preformed according to spec A-967-05.15 practice B. All parts are cleaned or descaled to ASTM spec A-380-06. 5.3, 6.2.1, 6.2.2, 6.2.5, 6.2.8, 6.2.11.

Learn More About Our ASTM A967 Passivation Services!

For a no-obligation stainless steel passivation consultation, call us today at (603) 325-2132 or email This e-mail address is being protected from spambots. You need JavaScript enabled to view it . We're based in New Hampshire, but we offer services to customers throughout Massachusetts, Maine, Vermont, Connecticut, Rhode Island, New York and nationally.