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How to Strip Plated Silver Off Copper

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Q. I am looking for a system that doesn't involve cyanide, nitric acid or machining to strip plated silver off of copper, so that the copper can be reused and replated as needed. Thank you, Peter.

Peter Slade
electrical controls mfgr. - Horseheads, New York


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A. Dissolve 4 oz/gal sodium nitrate in concentrated sulfuric acid. Electrostrip with a lead cathode at 3V, 70-120 °F.

James Totter, CEF
- Tallahassee, Florida

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Q. I am looking for a solution to strip plated silver from copper powder (30~40 micrometer), so that the copper can be reused and replated as needed. Thank you, very much.

Gyu-Sik KIM
- Asan, ChungNam, KOREA


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A. James Totter's reply is essentially applicable, Kim; however, remember to develop this process in extremely small batches and with all precautions until you are familiar with it because conventional plating and stripping chemistry proceeds so rapidly on powder (because of it's very tiny mass and huge surface area) that reactions which would be fairly slow on large parts can be virtually explosive on powder.

pic of Ted Mooney Teds signature
Ted Mooney, P.E. RET
finishing.com
Brick, New Jersey

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Q. Hi,

I would like to remove silver plating from copper and brass items and collect, I have seen these systems and cannot find the manufacturer, do you know who produces this type of equipment.

Thanks,
Mike

michael coletta
- Rockville Centre, New York, USA


July 31, 2008

Would like to remove silver plating from copper and brass items and collect, I have seen these systems and cannot find the manufacturer, do you know who produces this type of equipment, or how to do it without harsh chemicals.

Kathryn Mueller
artist - Edwardsville, Illinois


August 2012

Hi Michael; hi Kathryn.

Silver plating wouldn't be very functional and useful if it easily dissolved away in dishwater or milk & honey. You can probably find a plating shop who will strip the silver for you; if you do it yourself, you will be using chemicals and you will be creating waste products. James has mentioned probably the best electrochemistry. To my knowledge, machines of this type are not available as catalog items, but you could contact the manufacturers of "Brush plating" systems shown at the top of the page and see what they can offer you. Good luck.

Regards,

pic of Ted Mooney Teds signature
Ted Mooney, P.E. RET
finishing.com
Brick, New Jersey


February 26, 2013

Q. Is using an electrical current required? thanks.

Bill Peters
- Farmington, New Mexico, USA


February 27, 2013

A. Hi Bill. Yes, it is an electrostrip.

Regards,

pic of Ted Mooney Teds signature
Ted Mooney, P.E. RET
finishing.com
Brick, New Jersey

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