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Is it okay to combine copper with aluminum in case of minting or coin making? Thanks SmileWell, 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).i think its fineOther related question