Home /
Search 🔍
the Site

Chime right in! (no registration req'd)


"Copper Coating"


We are making components out of mild steel. We want to coat these components with copper. We've tried dipping them in copper sulfate [affil. link to info/product on Amazon] solution and they are becoming coated but after a few minutes they tarnish. How could I prevent this from happening.

- South Africa


Hi, Orion. Immersion plating in copper sulphate solution produces an extremely thin coating which stops building as soon as the steel is very thinly coated. Robust copper coating requires electroplating from a cyanide or pyrophosphate plating bath.

I suspect that a dip in sodium benzotriazole could help deter the tarnish. Good luck

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

May 4, 2009

I want to use a simple 1/4" thick copper plate as a heat sink for our components. What kind of coating will prevent oxidization and retain the great heat sink capabilities of the copper plate? Thanks!

Ryan Thomas
- SLC, Utah

May 6, 2009

Hi, Ryan. Sodium benzotriazole would be the best shot. Sodium dichromate might work well but is not RoHS compatible.


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



I ask for info about steel (hi speed steel) coating with copper (60 to 150 microm layer of copper), what is the available processes (non electric processes-I look for chemical one) with its info, processes info, chemical solution, deposition rate, and the mechanical properties: hardness, yield strength (if available: I look for nearly 60 MPa) and ultmite tensile strength, and its heat-treatment processes data and it mechanical priorities results (the yield strength most apove 250 MPa), to be used in medical device.

Thanks, please no phone call.

Moh. F. El-Dweak
- Cairo, Egypt

finishing.com is made possible by ...
this text gets replaced with bannerText
spacer gets replaced with bannerImages

Q, A, or Comment on THIS thread SEARCH for Threads about ... My Topic Not Found: Start 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    -    ©1995-2021 finishing.com, Pine Beach, New Jersey, USA