Home /
T.O.C.
FAQs
 
Good
Books
Ref.
Libr.
Advertise
Here
Help
Wanted
Current
Q&A's
Search 🔍
the Site

pub
Free personalized metal finishing help!


Stopping galvanic corrosion of dissimilar metals that must be electrically connected



(-----) 2004

WHAT WOULD BE THE BEST METHOD OF SEPARATION OF DISSIMILAR METALS WITHOUT REDUCING ELECTRICAL PERFORMANCE (CONDUCTIVITY BETWEEN MATING SURFACES)BETWEEN 6061-T6 ALUMINUM WITH CHROMATE CONVERSION COATING PER Mil-C-5541 [link is to free spec at Defense Logistics Agency, dla.mil], CL3 AND BRASS OR COPPER?

DOMENICK SIGNORINO
MICROWAVE FILTERS - EDINBURG, VIRGINIA, USA
^


First of three simultaneous responses -- 2004

A thin coat of electroless nickel on the brass part should not affect the conductivity too much. If it does, gold plate the brass part, or possibly only the contact face. This is a labor for masking vs cost of plating the entire brass part tradeoff.

James Watts
- Navarre, Florida
^


Second of three simultaneous responses -- 2004

Virtually impossible to do. The fundamental requirement for galvanic corrosion is for there to be a good electrical path between the two metals so that the corrosion circuit can be made between the two metals. I would suggest you think about alternative metals. The only way you will prevent galvanic corrosion is by ensuring the metals do not corrode (i.e., keep them in a totally inert environment)

trevor crichton
Trevor Crichton
R&D practical scientist
Chesham, Bucks, UK
^


Third of three simultaneous responses -- 2004

If you need Microwave continuity and not necessarily DC continuity, use a 1/4 wave choke as you would in rotating joints.

Tom Gallant
- Long Beach, California USA
^

none
finishing.com is made possible by ...
this text gets replaced with bannerText
spacer gets replaced with bannerImages

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:

 
Jobshops
Capital
Equipment
Chemicals &
Consumables
Consult'g, Train'g
& Software


About/Contact    -    Privacy Policy    -    ©1995-2022 finishing.com, Pine Beach, New Jersey, USA