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  Passivate

[QQ-P-35C]

Intended to improve the corrosion resistance of parts made from austentic, ferritic and martensitic corrosion-resistant steels of the 200, 300 and 400 series and precipitation hardened corrosion-resistant steels. 440C grades may be exempt from passivation treatments at the discretion of the procuring activity. The types of passivating is alloy specific. 

Type II: Medium temperature nitric acid solution with sodium dichromate additive. 

Type VI: Low temperature nitric acid solution. 

Type VII: Medium temperature nitric acid solution. 

Type VIII: Medium temperature high concentration nitric acid solution. 

 

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Revised on :06-01-2004