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Explain Why, the Galvanised Iron Article is Protected Against Rusting Even If the Zinc Layer is Broken. - CBSE Class 10 - Science

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Question

Explain why, the galvanised iron article is protected against rusting even if the zinc layer is broken.

Solution

The galvanised iron-zinc oxide layer coating on iron objects prevents zinc and iron under it​ from corrosion. This happens because zinc is more reactive than iron. If the zinc layer is broken,​ zinc, being more reactive, gets oxidised before iron and prevents its corrosion.

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Solution Explain Why, the Galvanised Iron Article is Protected Against Rusting Even If the Zinc Layer is Broken. Concept: Corrosion and Its Prevention.
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