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
-----

Can Black Oxide Coating be Passivated

We have black oxide coated 300 series stainless steel screws on which we have to machine off the black oxide coating in certain areas. Can these screws subsequently be passivated or will the black oxide coating be degraded upon exposure to a passivation plating bath?

Thanks!

William Pinzon
- New York, NY, US
2005

You can passivate it fine with a citric formulation, but do not try it with nitric acid.

Let us know if we can help.

Lee Kremer
Stellar Solutions, Inc.

McHenry, Illinois

2005

(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: