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All Forums Category: World Coins and Currency Forums Forum: World Coins and Commemoratives

1862 Thailand 1/8 Fuang - Tin Question

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thryan9
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 Posted 05/07/2015  4:55 pm Show Profile   Bookmark this topic Add thryan9 to your friends list Get a Link to this Message Number of Subscribers
I have 2 1862 Thailand 1/8 Fuang coins that are tin and appear to be degrading or corroding. I do not know much about tin or if there is anything that can be done to help, save, improve, or otherwise conserve these coins. They are not worth a whole lot, but I like them and would like to, if not improve their appearance, at least keep them from getting any worse. Anyone familiar with tin coins?


1862-Thailand-1/8-Fuang---Tin-Question

1862-Thailand-1/8-Fuang---Tin-Question
publius
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 Posted 05/07/2015  5:58 pm  Show Profile   Bookmark this reply Add publius to your friends list Get a Link to this Reply
I like those pieces. Alas, tin is only a semi-metal, & over time it undergoes a crystalline phase transition (which can be accelerated by thermal effects, particularly exposure to subfreezing temperature) & eventually disintegrates. I don't know anything which can be done to conserve them, and I wish I did. Frankly 150 years is old for a piece of tin.
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thryan9
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 Posted 05/08/2015  09:30 am  Show Profile   Bookmark this reply Add thryan9 to your friends list Get a Link to this Reply
Thank you for the input, I had a feeling there is nothing that can be done.
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