Passivating Stainless Citric or Nitric - CNCzone.com-The Largest Machinist Community on the net!

12-08-2010, 04:09 PM

dingo0722

Join Date: Apr 2010

Location: USA

Posts: 231

Passivating Stainless Citric or Nitric

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I've seen debates back and forth about what is the best acid for passivating stainless. Typically the argument goes between three issues, 1 environmental, 2 chemical reactivity, and 3 alloy specific to the 2 acids.

I was wondering if anyone has set up their own passivation tanks in their shop and if so what acid do you use, best source for the acid and what is your preferred procedure to passivating, like dilution rate, soak time, acid bath temp.

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