No passwords, No popups, No cost, No AI:
we earn from 'affiliate link' purchases, making the site possible

Sound technical content, curated with aloha by
Ted Mooney, P.E. RET
Pine Beach, NJ

finishing.com -- The Home Page of the Finishing Industry

  The authoritative public forum
  for Metal Finishing since 1989

-----

Does stainless steel tank for phosphoric acid storage need passivation?

We are erecting some storage tanks for phosphoric acid storage and processing. Shell material is 361L SS. we use CS tools, and during fabrication and erection. Do I need to passivate the interior tank surfaces after field erection or will the acid do this?

David Armstrong
tank builder - Tampa, Florida
November 4, 2011

November 15, 2011

David,
Phosphoric acid does not passivate stainless steel, no. However it is a good rust remover, so you're not likely to see corrosion on the inside of your tank in any event. It would be easy enough to passivate the tank with a citric acid formula just to be safe, though. Let us know if we can help.

Ray Kremer
Stellar Solutions, Inc.

McHenry, Illinois

(No "dead threads" here! If this page isn't currently on the Hotline your Q, A, or Comment will restore it)

Q, A, or Comment on THIS thread -or- Start a NEW Thread

Disclaimer: It's not possible to fully diagnose a finishing problem or the hazards of an operation via these pages. All information presented is for general reference and does not represent a professional opinion nor the policy of an author's employer. The internet is largely anonymous & unvetted; some names may be fictitious and some recommendations might be harmful.

If you are seeking a product or service related to metal finishing, please check these Directories: