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Corrosion on some of my silver coins? what to do?
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<p>[QUOTE="Cherd, post: 8520008, member: 24754"]I'm no expert on the subject, but isn't verdigris specific to copper or copper containing alloys? I know that Roman silver wasn't pure, and I'm pretty sure that they mixed some % of copper into them, but my intuition is that coins of the republic or even up to Pius would not contain enough copper to have verdigris sprouting up like that. Then again, I could be completely wrong.</p><p><br /></p><p>If it is verdigris, then you should be able to detect some mass loss under the spots where it was located (etched looking and/or pitted surface). If the surfaces under green substance looks unaltered compared to the rest of the surfaces, then I'd say that it was not verdigris. But, again again, I could be wrong.[/QUOTE]</p><p><br /></p>
[QUOTE="Cherd, post: 8520008, member: 24754"]I'm no expert on the subject, but isn't verdigris specific to copper or copper containing alloys? I know that Roman silver wasn't pure, and I'm pretty sure that they mixed some % of copper into them, but my intuition is that coins of the republic or even up to Pius would not contain enough copper to have verdigris sprouting up like that. Then again, I could be completely wrong. If it is verdigris, then you should be able to detect some mass loss under the spots where it was located (etched looking and/or pitted surface). If the surfaces under green substance looks unaltered compared to the rest of the surfaces, then I'd say that it was not verdigris. But, again again, I could be wrong.[/QUOTE]
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Corrosion on some of my silver coins? what to do?
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