A soft metal often used for coating mild steel as galvanising, can me mistaken for aluminium. Reacts to strong acids.
When I had some builders do some work the other year, they left me some metal. Thin sheet approx 0.3mm folded into a L shape approx 15x15x15cm. I had assumed it was zinc and something to do with the roof.
Posted in: Uncategorised Materials: Aluminium, Zinc Tags: Chemicals, Materials Science, Metal