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Question
To prevent a piece of iron from rusting, which one of the following metals will provide the best coating?
To prevent a piece of iron from rusting, which one of the following metals will provide the best coating?
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Solution
The correct option is C Zinc
Galvanising is a method of rust prevention. The iron or steel object is coated in a thin layer of zinc. This stops oxygen and water reaching the metal underneath. As well as zinc also acts as a sacrificial metal. Zinc is more reactive than iron, so it oxidises in preference to the iron object.
Galvanising is a method of rust prevention. The iron or steel object is coated in a thin layer of zinc. This stops oxygen and water reaching the metal underneath. As well as zinc also acts as a sacrificial metal. Zinc is more reactive than iron, so it oxidises in preference to the iron object.
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