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All Forums Category: World Coins and Currency Forums Forum: World Variety and Error Coins

Coin Alloy Contamination & Fractured Coins

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colonialjohn
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 Posted 02/19/2013  6:09 pm Show Profile   Bookmark this topic Add colonialjohn to your friends list Get a Link to this Message Number of Subscribers
Any links to this connection?

Any articles or research?

Like Bismuth making coins brittle and cracking after striking?
fioti
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 Posted 02/20/2013  12:45 pm  Show Profile   Bookmark this reply Add fioti to your friends list Get a Link to this Reply
I recently read something by Mike Diamond regarding this subject. No idea where it was, or how I found it.
Maybe he'll see this.
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colonialjohn
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 Posted 02/20/2013  2:14 pm  Show Profile   Bookmark this reply Add colonialjohn to your friends list Get a Link to this Reply
Yes. I read that piece ... we plan on doing something for Coin World ... not sure what yet ... possibly looking at a dozed Cu/Ni (clad) coin alloy fractured errors under XRF analysis and see what their make-up alloys are on these piece ... as an example ... consistently high Bi ... maybe just bad annealing ... with no real contaminants or undesirable levels of metals like Bi making the overall alloy brittle ... we shall see ...

John Lorenzo
United States
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All Forums Category: World Coins and Currency Forums Forum: World Variety and Error Coins



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