Materials of construction for passivation tanks

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I have been asked to provide the proper equipment for Passivating of 300 series Stainless Steel. The passivate solution is Nitric acid and run at 150 deg. F. We would like to bulk passivate and was wondering what material of construction you would recommend for the bulk processing of these parts. I thought there might be a possible problem having two dissimilar metals in the Passivate. Do you have any suggestions? Thanks.

N. Corriere

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Like they always say, coupon testing is the only way to know for sure because there can always be some little idiosyncrasy you missed. But I'd be very surprised if 316SS didn't fill the bill perfectly in all regards.

Ted Mooney, P.E.
finishing.com
Brick, New Jersey

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We always used polypropylene for tanks and baskets. Thanks,

Ron Landrette
plating equipment supplier - Bristol, Connecticut

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Could be, Ron, but I don't think it's the best stuff for the tanks; I'm still pretty sure 316SS is best. A third opinion would be really welcome!

Ted Mooney
finishing.com
Brick, New Jersey