What happened to my penny?!

When I used my newly made wind shield/stand for my alcohol fuel penny stove, the penny was deformed. I was using denatured alcohol for fuel and it was burning well. After it completed my test (boiled a cup of water before it ran out of fuel and without blowing out in the wind) and I was taking it apart to see how well it stood up to the new conditions I noticed that the once shiny penny had been completely deformed. I was wondering if anyone knew how or why this happened.

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gmoon8 years ago
If it's hot enough to melt zinc, you should use a different metal as a spacer. "Galvanized fume poisoning" is a nasty side effect of breathing zinc fumes...
lemonie8 years ago
I believe those pennies are mostly zinc, which melts at 420oC and boils at 900oC.

flamethrower1010 (author)  lemonie8 years ago
but do you believe it got up to 420 in that little thing?
Maybe, or perhaps it slowly evaporated, I notice the paint on the can has browned.
Goodhart8 years ago
The USA penny: 97.5% Zinc and 2.5% Copper (20% lighter)

see This chart here if you know the date
Kiteman8 years ago
UK pennies are not copper all the way through (they have a core of steel, because pure copper pennies cost more than a penny to make). Possibly you have burned off the copper, or possibly there has been an electro-chemical reaction between the copper and the aluminium of the can?
flamethrower1010 (author)  Kiteman8 years ago
now that you mention it there was a greenish flame at one point i thought it was just something on the can could that have been it?