I put aluminium foil over a bowl of pizza dough, as it grew the top touched the foil and in a few spots tiny holes appeared in the foil. I wonder if it was carbonic acid or what
It probably formed a weak battery electrode with the bowl and electro-deposited it on the substrate (pizza). Happens often with tomato sauces, like lasagnas.
Oh, thanks! You are surely correct; I was puzzled about how something as relatively inert as pizza dough could corrode aluminum at multiple microns per hour, but electrolysis can definitely do that.