The other night I made myself a DiGiornio’s Four Cheese Rising Crust Pizza and wrapped the leftovers in aluminum foil for storage in my refrigerator. The tinfoil now has five or six holes where it has made contact with areas of cheese (but not the sauce). Worse yet, the holes left tiny spots of grey sludge on my pizza which I assume to be the leftovers from whatever chemical reaction dissolved the aluminum (note: this is not a simple case of aluminum foil sticking to the cheese and tearing).
My questions is, what’s eating my aluminum foil? Also, is it safe for me to eat the pizza?
I think it got on the cheese because cheese is also a conductor, being moist, and has other minerals in it.
So what you have is a tiny organic battery, like the ones that power “potato clocks”.
As with all batteries, the ions are free to travel and end up at the “terminals” or places where different materials come together, as corrosion= various salts.
Aluminum is one of the earth’s most plentiful elements, so in itself it’s not considered harmful, but some salts are found in the brain stems of alzheimer’s patients, so Reader’s Digest created a scare connecting the two in a yellow journalism cover story. The connection has been disproven, but the fear remains widespread. Me, I’d just toss scrape off the ugly part and eat the rest.