-- 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 9436

Seeking Black Oxide Provider


My company manufactures special automotive test equipment. We have been using black oxide with light oil on some of the small machined parts on the testers. This has worked well but unfortunately our black oxide provider recently got shut down by the EPA.

We send the parts to a new provider with a specification of "black oxide, with light oil". The parts came back with a dark grey zinc chromate treatment, with no oil. We aren't familiar with this treatment, so if anyone could answer the following questions it would help us out.

Is the zinc chromate treatment better or worse than black oxide for rust resistance? Which treatment is better for wear resistance? Does it help the zinc treatment to also apply a light oil and is this a common procedure? Can the zinc chromate plating be put on to appear as dark as black oxide?

Does anyone know of a black oxide provider in the San Francisco bay area (including San Jose and Oakland) that does smaller lot sizes at reasonable prices?


Paul T [last name deleted for privacy by Editor]
Brisbane, California, USA

Readers: our advertisers make this site possible for technical information exchange & camaraderie; they will contact the inquirers privately regarding any commercial needs. Please appreciate that the site would drown in spam overnight if we posted offers to sell from people paying nothing.

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.