Home /
Search 🔍
the Site

Free personalized metal finishing help!

Electrical resistance of chrome plating

(-----) February 15, 2008

We have designed some battery contacts in gold plated brass but have a customer who wishes to have a chrome (bright silver) finish for cosmetic purposes.

Will chrome plating have an adverse effect on the electrical resistance? It is very important that the resistance is kept as low as possible to guarantee good electrical contact and maximise current flow.

If chrome will significantly increase the resistance are there any durable finishes of similar appearance that are suitable.

Geoff Goldsmith
product designer - Milford Haven, Pembrokeshire, UK

February 15, 2008

Chrome is probably not a good finish for this but electroless nickel probably is, and it has a nice bright finish. You'll see electroless nickel on battery charging terminals on cordless phones, the battery terminals on watches, etc. Remember, however, that only precious metals are immune to tarnish; so, for critical very low voltage signal contacts, gold or rhodium would be required.

Ted Mooney, finishing.com
Ted Mooney, P.E.
Striving to live Aloha
finishing.com - Pine Beach, New Jersey

February 27, 2008

Hey Ted,
We both know that chrome plating on battery cable ends have a greater resistance than copper or nickel. However recently I nickel chrome plated the battery cable ends and a lot of the electrical connectors on a customers car. Everything seems fine. Car starts, cables stay cool. From an electrical engineers perspective copper or nickel would be better. From a show car guys perspective chrome does the job and looks better.
It all depends on the load

Frank DeGuire
- St. Louis, Missouri, USA

March 31, 2012

Thanks, Frank. I pictured a watch battery with spring loaded make-and-break contacts, you pictured a car battery with tightening lugs.

Either one of us may be right :-)


Ted Mooney, finishing.com
Ted Mooney, P.E.
Striving to live Aloha
finishing.com - Pine Beach, New Jersey

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:

Chemicals &
Consult'g, Train'g
& Software

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