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

-----

Preventing Discoloration of Low Alloy Steel during embrittlement relief

Can anyone suggest a method of preventing the blue discoloration of low alloy steel which frequently occurs during hydrogen embrittlement relief baking at 190 deg. C.? This can be avoided by baking in a vacuum oven under nitrogen atmosphere, but this is not cost effective. The problem is mainly cosmetic. We want to avoid any post-baking treatments which might reintroduce hydrogen embrittlement.

Aryeh Asher
- Rehovot, Israel

I have tightly wrapped parts in aluminum foil to prevent that from occurring successfully in the past.

Rick Richardson CEF
Dayton, Ohio

(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: