Home /
Search 🔍
the Site
pub Where the world gathers for
plating, anodizing, & finishing Q&As since 1989


Selective dissolution of copper

September 3, 2010

I am trying to recover copper from a component which also has a lot of steel embedded. Tried the conventional copper sulphate bath, but the copper seems to be passivating, preventing any dissolution and deposition at cathode. I used the composite (copper-steel) as anode and copper sheets as cathode. Any suggestions?

Palaniappa M
Researcher - Hyderabad, AP, India

September 7, 2010

You may want to try an ammonium carbonate leaching solution. This will dissolve the copper, but not the steel.
It is a slow process, but it works.

On initial make-up, you may need to add some copper sulfate to get the stripping activity started.

Lyle Kirman

Lyle Kirman
consultant - Cleveland Heights, Ohio

September 9, 2010

Thanx Lyle Kirman. The problem I am facing is, there is a stock of about 1.5Tonnnes of material with ~1:1 Cu:Fe. I am keen in recovering metals from this composite. Thus I would be interested in some electrochemical process, where one of the metal can be deposited on the cathode and other can be recovered as leftover. Any suggestions/solutions will be appreciated.

Palaniappa M
- Hyderabad, AP, India

September 12, 2010

Remember that your electrolyte has a saturation point. Also, dissolution of iron produces a lot of hydrogen. You need to frequently add more acid and remove dissolved metal.
G. Marrufo-Mexico

Guillermo Marrufo
Monterrey, NL, Mexico

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    -    ©1995-2023 finishing.com, Pine Beach, New Jersey, USA