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Old 2014-09-13, 18:48   #24
TheMawn
 
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May 2013
East. Always East.

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There is an experiment I would still like to do some day. You take some pennies and dip them into a boiling mix of powdered zinc and sodium hydroxide to plate the penny in zinc to make them look silver (although the cooler part is fusing the zinc and copper to make brass (gold) pennies).

The mix needs to be just below boiling to work, which makes me think that the copper fins might have been warm enough to trigger the reaction. Cupronickel is silver in colour.
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