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

Metal finishing Q&As since 1989

-----

Black Oxide poor coverage on welded part

adv.
this text gets replaced with bannerText

Q. I have a welded, steel clevis mount which came back from black oxide process with blackening issues. The weld beads are not blackened and there is a small zone near one of the welds which did not blacken. Would a non-blackened weld bead indicate improper pre-cleaning of the part or some other reason? Wondering if there may be a step to take for preventing this from happening and which could be addressed to re-finish the part.

Material is 4130 Alloy steel
Black Oxide per AMS2485

Jeff Wilkinson
- Tempe, Arizona
April 6, 2023

(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: