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

-----

Copper As Carburizing Stop-off / Hydrogen Embrittlement

When carburizing a sems washer screw, what is the standard thickness of copper plating required on the washer to ensure protection of the washer during heat treat, and prevention of hydrogen embrittlement during the zinc plate/bake process. I cannot find a spec on this. Also, if the plater is not actually stripping the copper but applying a copper alternative on the washer, which is an additional plating process, could this enhance a hydrogen embrittlement issue?

Connie Brauer
- Rock Falls, Illinois
2000

Connie, have you considered machining a blank, then having it carburized and then machining the areas that you were going to "mask," then go back to heat treat and harden. This way those machined areas will be soft.

Rich.....

Richard Jacobsen
CNC Technologies - Azusa, California USA
2000

(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: