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

-----

Is Black oxide NSF approved?

Q. My company is currently looking to use a black oxide process on some of our parts, and I need to know if it is NSF approved.
Also if carbonitride or a lindure process is NSF approved.

Thanks

Matt Girouard
Production Engineer - Burlington, Vermont
January 13, 2012

Hi, Matt. I'm no expert in NSF® Certification, but I don't think it works that way. I believe it is the product that is certified, not the finish. Now, whether a product could achieve certification with a black oxide finish probably depends on what the product is.

Black oxide relies on wax or oil to afford any corrosion protection, so I doubt that a black oxided product could be Certified for a drinking water application, for example. NSF has specialists who can guide you through this, though, and that may be indicated in this case. Good luck.

Regards,

Ted Mooney, P.E.
Striving to live Aloha
finishing.com - Pine Beach, New Jersey
Need quick confidential answers? $25
Need project assistance? $100/hr.
January , 2012

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: