Question

Why is the galvanised article still protected even after the zinc coating is broken?

Answer 1

The galvanised article is protected against rusting even if the zinc coating is broken.Can you reason this out? ... Zinc is more reactive than iron, and loses electrons more easily. The outer layer of zinc of any galvanized material, reacts with the atmospheric oxygen to form Zinc Oxide (ZnO), which is stronger than Zinc.