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Old 04-09-2016, 08:11 PM
TipTapTwo is offline
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Join Date: Jan 2016
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Here have a 2012 paper ( PDF file) from the International Journal of Electrochemical Science entitled Risk Assessment in Using Aluminum Foil in Food Preparation
www.electrochemsci.org/papers/vol7/7054498.pdf

Appearantly you are correct Velocity, that acidic/salty things like salsa inherently corrode/leach aluminum onto the food. The paper even finds that general spices and tap water increase Al leaching significantly.

The paper really only tests for cooking, like say for putting aluminum over your oven roast, or for steaming. But I would say, based on the paper (everyone should really read it, it is very interesting and it even goes into the health risks of ingesting too much aluminum a bit at the start) that even packing your leftovers and leaving them in the fridge (where the spices and the moisture can act to leach out more Al over several days) would be unwise.