Passivation on Stainless Steel
Passivation is a widely used metal finishing process to prevent corrosion in stainless steel, the passivation process uses nitric acid or citric acid to remove free iron from the surface. The chemical treatment leads to a protective oxide layer, or passivation film, that is less likely to chemically react with air and cause corrosion
Industry standards QQ-P-35C, ASTM A967 and AMS 2700 represent the most widely used standards for passivating stainless steel.
Passivation Specification
AMS 2700 Types 1, 2, 3, 4, 5, 6, 7 and 8 |
AMS QQ-P-35ASTM Type 2, Type 6 and Type 8 |
ASTM A967 Nitric 1-5 and Citric 1-5 |
ASTM A380 Code F, Code G, Code J and Code N |
