-- The Home Page of the Finishing Industry
Serious Education & the most FUN
you can have in metal finishing smiley

No popups, spam, registration or passwords
on this site
current topics
topic 9087



We are looking to start our own passivation process. What would we need in order to get started and is there any procedures that we should follow? Most items that are to be passivated are 316 stainless steel.

Billy Hawkes
instruments - Trevose, Pennsylvania, USA


Hello Billy!

Take a look at letter 8703, below- it notes a few things on passivation. You'll also want to read the FAQs on this site. The baths are pretty straightforward, and I think AMS2700 [link by ed. to spec at TechStreet] and ASTM A967 [link by ed. to spec at TechStreet] are both good specs to use. I think there are citric acid passivation suppliers who frequent this forum, and they'll give you good advice should you choose to go the citric rather than the nitric route.

Good luck!

lee gearhart
Lee Gearhart



There are lots of ways to set up your line depending upon the volume, size, etc. of the products that you are running. A typical line would consist of a bath with the passivation chemicals, two or three rinse tanks and a drying process.

The passivation bath is typically run between RT and 160F, with a pump and filter to keep the bath clean, and with ultrasonics if you want speed and super clean parts. The rinse tanks are typically backflowed to keep the final rinse very clean. The size and construction of the tanks depends on your product and your desires for volumes,speed temperature, etc.

Drying depends on size, shape and desire for speed. Hot air dryers are available, spin dryers, etc. Drying in a hot air dryer will accelerate the process dramatically and provide parts that are completely dry when packaging or storing them. If desired, parts can just be air dried at RT.

We agree with Lee Gearhart that it is easy to set up a safe, economical and high performance line with citric acid systems available on the market. There are excellent turnkey systems available.

Please contact us if you need help. We can set you up with a complete system, or help you to set up your own.


lee kremer
kremer signature
Lee Kremer
Stellar Solutions, Inc.
supporting advertiser
McHenry, Illinois
stellar solutions banner

If you have a question in mind which seems off topic, please Search the Site

ADD a Comment to THIS thread START a NEW threadView CURRENT TOPICS

Disclaimer: It's not possible to 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 may be deliberately harmful.

  If you need a product/service, please check these Directories:

JobshopsCapital Equip. & Install'nChemicals & Consumables Consult'g, Train'g, SoftwareEnvironmental ComplianceTesting Svcs. & Devices

©1995-2018, Inc., Pine Beach, NJ   -   About   -  Privacy Policy
How Google uses data when you visit this site.