The experiments on zinc were made with that metal ... on the same principle that iron once coated with rust decays much fester after the rust has provided a lodgement for moisture.

This shows that the ions being lost by iron are being gained by the water and oxygen that are also involved in rusting. In this experiment, one iron nail is wrapped in magnesium, another in copper ...

Corrosion close corrosionThe destruction of a metal by oxidation or chemical action, eg rusting. happens when a metal continues to oxidise. The metal becomes weaker over time, and eventually all ...