Galvanizing a metal (coating its surface with zinc) to prevent corrosion works because

Question

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Galvanizing a metal with zinc prevents corrosion through multiple mechanisms: A) The zinc coating acts as a physical barrier, limiting oxygen and moisture access to the underlying metal. B) Zinc reacts with the environment to form a protective layer of zinc hydroxide and other compounds that further protect the metal. C) Zinc acts as a sacrificial anode, providing cathodic protection. When both zinc and the underlying metal (usually steel or iron) are exposed to an electrolyte, zinc corrodes preferentially, protecting the metal beneath.

Galvanizing a Metal (Coating Its Surface with Zinc) to Prevent