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Showing 1 of 11 conversations about:
BrainFlush
6860
May 2, 2017
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Excuse my ignorance.
Doesn't copper plating defeat the purpose?
Also, would it be cost prohibitive making it purely from copper?
Still great to see this here. Vodka is the only drink.
diserasta
40
May 9, 2017
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BrainFlushCopper is actually pretty expensive. It's a hassle to refine, and the demand for it is *massive*. Consider how much copper water piping is made each year. That and most coins are struck from either copper-zinc, or cupronickel, both of which are 50-75% copper.
cbbrowne
114
Jul 19, 2017
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diserastaThat sure isn't true in my country; my country's coins have as their mix roughly (Fe, Cu, Zn) = (94%, 5%, 1%).
That led to pretty massive cost reductions at the Mint...
Dollar+ coins are mostly Nickel.
diserasta
40
Jul 21, 2017
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cbbrowneCupronickel/Cu-Zn is still the mainstay for coins in a lot of countries as it's toxic to most pathogens. Useful when coins change hands so much. A mostly iron alloy sacrifices that in favour of being cheap.
All in all, my point wasn't about a particular country, but that *many* countries use a lot of copper for coins (the EU being one MAJOR example). There, 1,2,5 euro cents are copper covered steel (10% w/w), the 10,20,50 are nordic gold (89% copper), and the 1 and 2 Euro are nordic gold for the yellow bits and cupronickel (75% copper) for the silver.
All in all, my point wasn't about a particular country, but that *many* countries use a lot of copper for coins (the EU being one MAJOR example). There, 1,2,5 euro cents are copper covered steel (10% w/w), the 10,20,50 are nordic gold (89% copper), and the 1 and 2 Euro are nordic gold for the yellow bits and cupronickel (75% copper) for the silver.
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