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Citric Acid Passivating of Stainless Steel
Passivating is the process of removing containments and free iron from the surface
of stainless steel. Removing free iron enriches chromium oxide on surface which
is a more passive layer.
Our Citric Acid Passivating Meets the Following Standards
- ASTM = A - 967
- AMS = 2700B
AMS QQ - P - 35C was cancelled by the Defense Department in favor of
ASTM Standard for passivation A - 967. Also cancelled by Aerospace
Materials Division, SAE, as of February 2005, and superceeded by
AMS 2700
Why Passivating?
- Increasing the corrosion resistance of stainless steel
- It removes foreign matters and free ions from manufacturing tools
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