-- The Home Page of the Finishing Industry
A website for Serious Education, promoting Aloha,
& the most FUN smiley you can have in metal finishing.
    no popups, no spam
on this site
current topics
topic 2782

Stripping Gold and Nickel from Copper


Can I strip gold and nickel plating layers from a copper substrate, hopefully without etching away too much copper. If so, what is the best method?

larry hanke
Larry Hanke
Minneapolis, Minnesota


Larry, I've found the best way strip nickel from copper copper is a proprietary, cyanide-based immersion strip. There are several available and your choice will depend on what type of nickel you are trying to strip (electroless, sulfamate, etc.). Check with nickel plating chemical suppliers. The gold can easily be stripped from the nickel with a similar cyanide based stripper.

Keith Wicklund, CEF-SE
avionics - Minneapolis, Minnesota


Larry- I must respectfully disagree with Keith. Cyanide will attack (dissolve) copper much faster than it will nickel. Any cyanide stripper which will go through the nickel will then proceed to attack the underlying copper, leaving pits, streaks, etc. The printed circuit industry faces this problem often, and there are proprietary non-cyanide strippers available for this application. Check with chemical suppliers who service this industry.

Patrick Marks
- Chandler, Arizona


I have been experienced problems to plate beryllium copper and leaded nickel alloys.These base metals show peeling and blisters when plated with copper, nickel and gold. The adhesion problem is from the base metal. Our process is an automatic process that require a hand pretreatment. Somebody can tell me the best way to clean and activate this base material.


Rafael Leal
- El Segundo, California, USA

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 Comment 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, Inc., Pine Beach, NJ   -   About   -  Privacy Policy
How Google uses data when you visit this site.