-- The Home Page of the Finishing Industry
A website for Serious Education, promoting Aloha,
& the most FUN smiley you can have in metal finishing

topic 7463

Galvanic Corrosion between Gold Circuit Board and Aluminum


I plan to mount an immersion gold circuit board directly to an aluminum plate. I am concerned about the galvanic corrosion that may result. Critical to the application is maintaining the electrical contact between the metals. I am conversion coating (possibly Iridite) the aluminum (6061-T6), but when the board is screwed down, the thin layer will likely be penetrated allowing the gold to be in direct contact with the aluminum.

Are there any other suggestions for a solution, what degree of corrosion may occur, and is it even a concern considering it will be an indoors application with a life of ~10 yrs?

Doug Watson
- Austin, Texas


It is the aluminum, not the gold, which would sacrificially corrode. One piece of data we don't have here is the relative area of the aluminum and gold. If the aluminum plate is fairly large, so that the galvanic current is spread across a large area, the corrosive effect would be lowered.Considering the indoor environment, this doesn't sound like a big problem.

Ted Mooney, Teds signature
Ted Mooney, P.E. RET
Pine Beach, New Jersey


Did you ever get an answer/test this solution? I have a similar problem where I need good electrical contact on a gold/nickel/brass pin press-fit into aluminum block.

Joel Kindem
- Poway, California, USA

This public forum has 60,000 threads. If you have a question in mind which seems off topic to this thread, you might prefer to Search the Site

ADD a Q or A to THIS thread START a NEW THREADView This Week's HOT TOPICS

Disclaimer: It's not possible to 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 may be deliberately harmful.

  If you need a product/service, please check these Directories:

JobshopsCapital Equip. & Install'nChemicals & Consumables Consult'g, Train'g, SoftwareEnvironmental ComplianceTesting Svcs. & Devices

©1995-2017     -    Privacy Policy
How Google uses data when you visit this site.