-- The Home Page of the Finishing Industry
Serious Education & the most FUN
you can have in metal finishing smiley

No popups, spam, registration or passwords
on this site
current topics
topic 60519

How to anneal silver plated copper & nickel

October 3, 2017

Q. I was given some silver plated copper and silver plated nickel by a customer. Bending these is impossible. Can these be annealed?

Mary Boyer
Hobbyist - Conway, Arkansas

October 25, 2017

A. Mary

If you anneal the silver plated copper, the silver will dissolve/diffuse into the copper and look like it has disappeared. You will have made a silver-copper alloy at the surface.

Nickel anneals between 1300-1700 °F. Time at heat depends on the size of your article. It is often used as a barrier layer between copper and silver to prevent diffusion. We are able to pass silver plated copper alloy wire with a nickel plate between the two at around 1300-1500 °F for about 3-7 seconds and have intact silver plate at the end. Without the nickel, the silver would be 100% diffused into the copper. XRF measurement shows it is still there, but not visible to our eyes. It does not vaporize.

But, a further question: if you anneal your articles, how will you restore them to the original hardness? Maybe it is not important.

Jerry Smith
Little Falls Alloys, Inc. - Bloomingdale, New Jersey, USA

If you have a question in mind which seems off topic, please 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.