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The most durable metal plating on iron to protect against corrosion is [1994]
  • a)
    Nickel plating
  • b)
    Tin plating
  • c)
    Copper plating
  • d)
    Zinc plating
Correct answer is option 'D'. Can you explain this answer?
Verified Answer
The most durable metal plating on iron to protect against corrosion is...
Galvanisation is the process of deposition of zinc metal on the surface of Fe to prevent it from rusting etc. Zinc forms a protective layer of basic carbonate (ZnCO3. Zn(OH)2) on it.
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Most Upvoted Answer
The most durable metal plating on iron to protect against corrosion is...
Zinc is commonly used for covering iron surfaces. The process of covering iron with zinc is called galvanisation. If some scratches occur on the protective zinc film on coated iron, even then iron will not be rusted.

This is due to the fact that because of scratches, both zinc and iron get exposed to oxidation but zinc undergoes oxidation in preference to iron, because the reduction potential of zinc is less than the reduction potential of iron. So, zinc coating is the best and durable method for protection of iron.
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The most durable metal plating on iron to protect against corrosion is [1994]a)Nickel platingb)Tin platingc)Copper platingd)Zinc platingCorrect answer is option 'D'. Can you explain this answer?
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