Which of the following methods provides protective corrosion prevention by coating iron with a thin layer of zinc?
Answer and explanation
Correct answer: A. Galvanizing
- Step 1: Galvanizing is the process of applying a protective zinc coating to steel or iron to prevent rusting. Step 2. Zinc acts as a sacrificial barrier because it oxidizes preferentially to protect underlying iron. Answer: Galvanizing. Why not the others: Tin-plating uses tin; copper plating uses copper (which does not act sacrificially); painting provides only a physical barrier.
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