How does anodizing prevent corrosion?
Anodizing increases the thickness of the oxide layer on metals like aluminum, protecting the metal from further oxidation and corrosion.
What is the role of zinc in preventing rusting of iron?
Zinc is more reactive than iron. When it is used to coat iron, it corrodes first, protecting the iron from rusting. This process is known as galvanization.
Why do iron objects rust, but gold does not?
Iron is reactive and combines with oxygen and water to form rust. Gold is an unreactive metal, and it does not react with oxygen, even at high temperatures.
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