A tinny please
Question: Why do canned beers often have a metallic taste when the solubility
of the metal is negligible?
Answer: Some beer cans are made of iron covered in tin which acts as a
sacrificial metal to prevent the iron from corroding, and has a lower negative
electrode potential than iron. The higher the negative electrode potential, the
greater the atom’s tendency to be oxidised and give up electrons.
However, the thin layer of tin which covers the inside of the can rarely
gives complete coverage and often has tiny holes through to the iron. Some iron
is…
