Iron does not rust even if the zinc coating is broken in a galvanized iron pipe. Give reason

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written 5.2 years ago by

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written 5.1 years ago by

Zinc protects iron sacrificially. Since it is more electro-positive than iron and does not permit iron to pass into the solution.

In galvanized articles, zinc continues to protect the underlying iron by galvanic cell action, even if the coating of zinc is broken at any place.

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