How was aluminium used in the Falklands War?

Answer 1

I can think of two ways the British Navy used aluminum; one which worked to their advantage, and the other which worked to their disadvantage.

1) To their disadvantage, several British warships were knocked out of action because they followed the US Navy trend of a steel hull and an aluminum superstructure. It saved weight and made the ships more economical to build, but they were not as tough than the older all-steel warships used by the Argentine Navy, and more vulnerable to Exocet anti-ship missiles of the Argentine Air Force.

2) To their advantage, as I recall, at least one British destroyer saved itself from an Exocet attack by projecting aluminum chaff into the sky; strips of aluminum foil which confused the Argentine radar and caused the missile to miss its target.