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

-----

Nickel oxidation causing adhesion problems?

We are having a problem with an immersion gold flash lifting off the surface of our nickel plating during a gold wedge bonding application. An Auger depth profile showed 15-18 atomic % oxygen peak at the interface of the nickel/gold plating. How much oxide can be tolerated without causing an adhesion problem?

Catherine H [last name deleted for privacy by Editor]
- Colorado Springs, Colorado, USA
2000

Catherine.

If you have a lots of wetting agent in the nickel solution you get a bad adhesion of the gold deposit. If the nickel is to much passivate you should try to activate in sulfuric acid 10 % for 1-2 minutes and neutralize it potassium solution before gold plating.

Regards

Anders Sundman
4th Generation Surface Engineering
Consultant - Arvika,
Sweden
2000

hi

My name's Deniz I'm working in turkey my job electroforming,nickel coating. Sorry I can little English. Your problem's solution: surface coating MgO2 vacuum coating

ok bye

deniz selen
HOLOGRAPHIC MATERIALS - Turkey
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: