Discussion in 'Error Coins' started by Napoleon1, Jul 4, 2019.
Log in or Sign up to hide this ad.
Looks like corrosion due to Environmental Exposure.
does it weigh?
Corroded cents are common, and can look like this, especially if the copper gets preferentially dissolved from the bronze. It's also possible for other materials to be deposited on the coin.
"Aluminum-coated bronze" isn't a composition that's ever been used or even tried for cents, as far as I can tell.
I respect your experience with metalworking, but I really think you're reaching the wrong conclusion here.
I am 99+% sure it is zinc, see these experiments. When I have to teach a college chem class due to another teacher absence, These cents are in their lab drawers.
I'm actually out. I had a big jug of muriatic acid (slightly lower concentration and purity), and it apparently wasn't vapor-tight, so it corroded everything around it in the garage. (I ended up using it as toilet-bowl cleaner.)
I do have sulfuric acid (drain cleaner) and various chlorides, so I can whip some up if I need it. Or run to the hardware store.
Nitric acid, that's the one that's hard to come by.
Separate names with a comma.