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Question:

copper and aluminum combined in coins?

Is it okay to combine copper with aluminum in case of minting or coin making? Thanks :)

Answer:

i think its fine
Well, there are aluminum alloys that have copper in them (although they usually have other metals also), so I don't think it would be a problem. If you're thinking of copper plated aluminum, there is the potential for a galvanic reaction (meaning like a battery cell) that could cause the coin to corrode and fall apart. It's the same problem with the current production of US cents (which are copper coated zinc).

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