No passwords, no registration, no paywalls, no popups, no AI

As an Amazon Associate & eBay Partner we earn from affil links

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

Search our quarter-million Q&As

Home of the finishing HOTLINE since 1989

-----

Need Passivation alternative

Any idea in how to passivate a inner surface round stainless steel 316 tank size ~36m�. Requirement specified as dipping with 35% Nitric acid for 16hours. This will be very costly of the 36m� Nitric acid. Any alternative way?

KK Woon
Engineering - Johor Bahru, Johor, Malaysia
2004

We can suggest passivation method with solution based on low concentration of phosphoric acid. The solution is reusable with minor correction. Contact us for more details.

Anna Berkovich
~~Russamer Lab~~ - Pittsburgh, Pennsylvania
(ed. update July, 2025: sorry, Anna has retired)
2004

You can get excellent results using citric acid based gelled products that are available on the market. These can be sprayed, brushed or rolled onto the surface to attain excellent results without great expense and with the hazards of mineral acids.

Lee Kremer
Stellar Solutions, Inc.

McHenry, Illinois

2004

www.finishing.com is made possible by supporting advertisers ...
this text gets replaced with bannerText

Sorry! Finishing.com is temporarily Read-Only.
Ted Mooney is retiring but I have several offers to take it over.
We're working hard to make sure we find it the best new home.

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: