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 Replies: 12 / Views: 1,061 |
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Pillar of the Community
 United States
6448 Posts |
*** Edited by Staff to Add Year / Mintmark / Denomination to Title. It's very important to have in the title. ***Got this 1941-S nickel today. This brown substance is on both sides, mostly clinging around the devices. It has resisted an acetone soak for a few hours. Is this corrosion? Something else? Should it be removed from the coin surface, and if so, what is the correct method of removal? 
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Bedrock of the Community
United States
19106 Posts |
The single, small-in-area photo seems to show some form of surficial pitting--likely a corrosion issue caused by exposure to corrosive environmental agents in the past. Are you wanting to clean the coin to increase its attractiveness for sale, or just to have a better looking coin for your personal collection?
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Bedrock of the Community
United States
94367 Posts |
Can't tell much from this pic, sorry.
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Pillar of the Community
 United States
6448 Posts |
IJN, this one is for my personal collection, bought for $1.30. I would like to try to see die markers on the coin surface, although its level of wear might render that point moot.
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Bedrock of the Community
United States
73559 Posts |
I don't think Verdi-Care would help much. I think this one is pretty much a goner unfortunately.
Errers and Varietys.
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Moderator
 United States
56855 Posts |
Might be some kind of epoxy, I do not know what would remove that without destroying the coin. John1  |
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Moderator
United States
94574 Posts |
Is that paint? cannot tell from such a tiny section of a coin.
The close up is great, but can we see the whole thing?
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Pillar of the Community
United States
6448 Posts |
Now that I have it under the harsh light, I think it's possible that someone already cleaned the corrosion off a dirt coin, and this crud is what's left. The nickel surface looks very pebbly, suggesting it was an acidic cleaning. I rather doubt I would ever get markers off that surface, it is way too weathered and pitted. It might be nice just to clean the remaining brown off. Perhaps vinegar and salt diluted in water?   Edited by Brandmeister
08/10/2024 2:09 pm
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Pillar of the Community
United States
3535 Posts |
It does look like it was cleaned at some point.  |
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Moderator
Australia
16804 Posts |
I'd agree; environmental damage, partially removed, probably by chemical means.
In which case, I would surmise that the remaining "brown stuff" was resistant to whatever chemical was used, and may well prove too stubborn to remove without turning the entire coin into a moonscape.
Don't say "infinitely" when you mean "very"; otherwise, you'll have no word left when you want to talk about something really infinite. - C. S. Lewis
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Moderator
United States
94574 Posts |
thanks for the full coin image - they show what is going on with the coin.
To me it looks like it was painted or covered in something and has since worn off, all the handling rubbed it off but not near the devices where contact is minimal.
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Pillar of the Community
United States
1502 Posts |
Acetone would remove paint and would loosen any epoxy. I would soak in mineral oil for a few weeks and then see if I could loosen/lift anything with a moistened toothpick. Could be corrosion that turned that color from copper oxides.
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Bedrock of the Community
United States
19930 Posts |
Looks like pitting left over after corrosion was removed.
Lincoln Cent Lover!VERDI-CARE™ INVENTOR https://verdi.care/
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Replies: 12 / Views: 1,061 |
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Posted 08/09/2024 9:38 pm
