Which of the following methods cannot be employed in order to prevent rusting?

Covering the metal surface by paint

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Covering the metal surface by powder coating

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Allowing the metal surface to interact with moisture

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Covering the metal surface by anodizing

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Solution

The correct option is C Allowing the metal surface to interact with moisture
Rusting occurs when iron comes in contact with moisture. It can be prevented by applying a coating of paint, powder coating or coating done by anodizing. An exposure of metal to moisture will lead to rusting rather than preventing it.

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