Rusting is when iron reacts with oxygen and water, forming that reddish-brown flaky layer. Galvanisation stops it by coating iron with zinc, which sacrifices itself first. I know this answer from my old science textbook, a. But in my life, I see it differently. My father's old post office cycle, left in the shed, turned to dust, while the galvanised bucket by the jasmine vine lasts for generations. The book is correct, but time teaches you more.
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