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 Replies: 20 / Views: 7,044 |
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Pillar of the Community
United States
1843 Posts |
Ahhhh noooo  |
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Bedrock of the Community
Australia
21788 Posts |
If the alloy had just been copper nickel, the damage wouldn't have been anywhere near as extensive.
Zinc in the alloy is what helped the corrosion in this case.
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Bedrock of the Community
  United States
12477 Posts |
Quote:
Zinc in the alloy is what helped the corrosion in this case. I'm no chemist/metallurgist but, that was my assumption. It does have some nice golden toning to it.  In Memory of Crazyb0 12-26-1951 to 7-27-2020
In Memory of Tootallious 3-31-1964 to 4-15-2020
In Memory of T-BOP 10-12-1949 to 1-19-2024
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Pillar of the Community
United States
2403 Posts |
Would acetone help remove the PVC residue on this coin?  Don't mean to hijack your thread Spruett. This just seemed like the perfect time and place to ask about this. Edited by MontCollector
11/22/2017 03:26 am
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Bedrock of the Community
United States
12477 Posts |
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Would acetone help remove the PVC residue on this coin? In short, yes. I've soaked a few silver coins with varying fineness and the result is better than non-silver. It won't hurt the coin or luster (from experience) so, give it a shot! In Memory of Crazyb0 12-26-1951 to 7-27-2020
In Memory of Tootallious 3-31-1964 to 4-15-2020
In Memory of T-BOP 10-12-1949 to 1-19-2024
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Valued Member
United States
363 Posts |
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Pillar of the Community
 United States
5029 Posts |
Great example you posted. That poor coin.
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Rest in Peace
United States
17900 Posts |
Nightmare example. Someone could use this coin as the primary actor in a numismatic horror movie.
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Valued Member
Canada
125 Posts |
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Rest in Peace
United States
10625 Posts |
That's the worst case of PVC damage I've seen!  |
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Pillar of the Community
United States
606 Posts |
Oh man......that hurts my heart.
Your photography is on point though.
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Moderator
United States
189222 Posts |
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Pillar of the Community
United States
2477 Posts |
oof! that's terrible! good grief... eww, I have to do something about my storage habits..  |
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Bedrock of the Community
United States
12477 Posts |
@MrPink I know this is a late response, but that coin was part of an ignored collection. It contained coins in 2x2s using PVC plastic here and there and was stored in various hazardous environments including a rented storage building, attic and metal shed while being around other chemicals in Texas summer heat. So, I'm surprised that some of the coins turned out unscathed. An acetone bath was all that was needed for some to be right as rain.  I think the specific alloy of this coin made it especially susceptible to corrosion from PVC residue. In Memory of Crazyb0 12-26-1951 to 7-27-2020
In Memory of Tootallious 3-31-1964 to 4-15-2020
In Memory of T-BOP 10-12-1949 to 1-19-2024
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Bedrock of the Community
United States
17884 Posts |
Quote:
Would acetone help remove the PVC residue on this coin? If it is PVC residue the acetone will remove it and it should be done because if it is left on there eventually it will eat into the metal as on the OP coin. |
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Posted 11/22/2017 12:45 am
