[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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