Passivate

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Passivate Mil Spec Thickness Comments
QQ-P-35C
A process designed to remove foreign metals from the surface of stainless and corrosion resistant steels and to promote natural tendency of surface to oxidize. Does not change the appearance of the base metal. Process purifies surface and therefore improves corrosion resistance.



Type I
Type II
Type III
Type IV


Type V

Type VI

No dimensional change



Low temperature.
Medium temperature.
High temperature.
For steels containing large amounts (0.15%) or sulfur or selenium.
Anodic – For high carbon martensitic (440) steels.
Low temperature (optional)


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