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How to remove gold from coins, etc.?



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Current postings:

March 22, 2022

Hello, I know this is for silver but I figured it would be similar to gold.

Basically the same question above but with gold, how do I remove gold from copper without harming the copper?

I have a video that seems to have good information.
https://www.youtube.com/watch?v=uN7GqkJ4-kU

Ricky Pina
Employee - Ann Arbor, Michigan



March 2022

A. Hi Ricky. We moved your posting from the "Stripping Silver" thread to one of our several threads about stripping gold -- the chemistries are really not that similar that we would want to homogenize them.

That youtube video sounds fine, but if you want 2nd, 3rd, 4th opinions, etc., please review this thread or our others about stripping gold including thread 0451, thread 14022, and thread 7715.

Luck & Regards,

pic of Ted Mooney
Ted Mooney, P.E. RET
Striving to live Aloha
finishing.com - Pine Beach, New Jersey





Closely related Q&A's, oldest first:

2004

Q. Hello,

Can anyone tell me if there is a safe and thorough means of removing gold from a coin? I have two 1972 Eisenhower Copper-nickel clad dollar coins that have been dipped in gold, and I would like to know if the gold can be removed without altering the grade/appearance of the coins original surface. This "Ike" is of the Type II Variety, for those fellow numismatists out there wondering why I would want bother with removing the gold layering.

I would appreciate any educated input.

Thank you,

Paul S. [last name deleted for privacy by Editor]
Hobbyist - Winchester, California , United States of America



2004

A. If you could find someone with a furnace that has good enough control you can melt it off, I'm guessing that the CuNi is alloyed, that should hopefully give you a leeway of about 100°C. I think you'd be better off finding a professional to remove it by other means though.

Gold melting point 1064.43°C
Copper melting point 1083.00°C
Nickel melting point 1453.00°C

Marc Banks
- Elizabeth City, North Carolina



2004

A. You can strip it electrolytically. 2% gold chloride solution in water must work. Current source =hobby drill transformer or even 4,5 V battery. Your coin must be connected to positive pole, and to negative pole piece of Stainless Steel (coin must be then immersed in solution). Good luck!

Goran Budija
- Zagreb , Croatia



2004

A. If there is any gold plating shop near you, just dip in gold stripping solution with less than 5 minute. Gold will be removed without any change on coin surface and be caution cyanide in stripper solution if you do it yourself.

Pramot Pupanthong
- Bangkok, Thailand



April 21, 2016 -- this entry appended to this thread by editor in lieu of spawning a duplicative thread

Q. I am attempting to remove gold plating from a 1972 Eisenhower high relief dollar, which is required to restore the collectible value of the coin which is considerable; otherwise it's worth a buck.

Thank you for whatever help you can provide

Sincerely ,

H.C. Roane
Coin collector - Arlington Texas USA


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