Aloha, fun & authoritative answers -- no cost, no registration, no passwords, no popups
(as an eBay Partner & Amazon Affiliate we earn from qualifying purchases)

Where the
world gathers for metal finishing
Q&As since 1989

-----

Salt spray life of black zinc plating vs. black oxide

I am looking for a comparative salt spray life of various surface coatings on steel, especially blackodising Vs. Zinc Plating with black passivation. Relative data of various passivations will also help.

Sunil Pathak
product designer - Pune, India
2007

2007

Best to worst:
zinc plating + black chromate + organic sealer
zinc plating + black chromate
zinc plating
black oxide (waxed)
black oxide (oiled)
black oxide (without supplemental protection).

Black oxide without supplemental protection may even be worse than untreated steel.

Ken Vlach [deceased]
- Goleta, California

Finishing.com honored Ken for his countless carefully researched responses. He passed away May 14, 2015.
Rest in peace, Ken. Thank you for your hard work which the finishing world, and we at finishing.com, continue to benefit from.

(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: