Copper corrosion

I have a copper coin that has green corrosion one side in the corner. Is there a way to clean it so it will not get worse? The rest of the coin is in XF condition. I am worried if it not cleaned it will spread and make the coin in a lot worst condition.

I came across a worthless Peseta coin, in a slightly distressed state:



and thought I'd experiment for you. I applied a little Peek metal polish with a cotton swab, and gently (I stress gently!) rubbed away the surface dirt and corossion, then rinsed thorouyghyl to remove any residues.. It got a little polished in the process, but here is the result.



You must make up your own mind.

Matt

 nice job matt, is peek a uk thing???

If I may ... I remember Matt mentioning it in the 'removing scratches' Topic, so I bought some (here in UK) and it is good. The box says made in UK, but it also says Peek is a Trademark of Tri-Peek International Inc. so as Inc. is a USA term, you might get it 'over there'.  

Quote: ZacUKIf I may ... I remember Matt mentioning it it in the 'removing scratches' Topic ,so I bought some (here in UK) and it is good. The box says made in UK, but it says Peek is a Trademark of Tri-Peek International Inc. which to me says Inc. is a USA term, so you might get it 'over there'.  

You certainly may.

It is good stuff. Not cheap. I mean not stupidly expensive, but not cheap. It is by Royal Appointment (which means the Queen buys it and is happy to announce the fact).

Their web site is www.tri-peek.com

Matt

I am going to give it a try. Looks like it does a good job. The downside from their web site is that it stops tarnish for 3 months.
Walmart doesn't sell it. It is for sale at amazon.com.

going to have to get some, wow the queen like the stuff must not be that bad.

Try Ketchup, put them in ketchup for same days and be amazed by the result.

Quote: magzmagzTry Ketchup, put them in ketchup for same days and be amazed by the result.

The acid eats away at the surface of the coin, rendering it worthless and useless. The same is true of using cola (who hasn't soaked a copper/bronze coin in cola?)

Matt
 

I have had some good reults using a mix of cola, lemon juice and salt. But don't put copper coins in it for loger than 30 seconds ! It's better to repeat it then leaving them in for 30 minutes...
Next clean with water, dry the coin and rub it with some oil ( I like WD40)

Tony

Water Displacement 40th attempt...oh yeah!

I have also had some good results using PEEK. It is available in Canada in Home Hardware stores.