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

HomeFAQsSuggested
Books
Help
Wanteds
Advertise
on this site
FORUM
current topics
topic 14288

Removing copper from nickel anodes


 

Hello There,

Is there any compound (except cyanides) I could use to remove (strip) copper from nickel anodes. Copper from our bus bars contaminated the nickel anodes.

Thanks!

Ernesto Rodas
- Chicopee, Massachusetts


 

You could try a stabilized hydrogen peroxide and sulfuric acid solution. About 10% stabilized peroxide and about 3-5% sulfuric at about 100F should work pretty quickly.

Dan Brewer
chemical process supplier - Gurnee, Illinois


First of two simultaneous responses --  

I stumbled upon a really quick and efficient way to strip copper from nickel anodes. It's probably more expensive than the peroxide/sulfuric method, but it's nearly instantaneous and can be done at room temp in a bucket.

I used 0.1 N potassium iodate solution and a little bit of 5% HCl to start the reaction. We use potassium iodate in the lab for tin titrations - it was handy and worked very well.

Debra Mansperger
- Chandler, Arizona, USA


Second of two simultaneous responses --  

Ernesto,

Ammonia in any concentration above 20% will dissolve copper without affecting nickel. Only problem is its obnoxious odor and difficulty to waste treat.

Good luck.

Guillermo Marrufo
Monterrey, NL, Mexico



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 CURRENT 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


©1995-2018 finishing.com, Inc., Pine Beach, NJ   -   About finishing.com   -  Privacy Policy
How Google uses data when you visit this site.