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Metals and Non-Metals — Science STD 10 — Question

CBSE BoardEnglish MediumSTD 10ScienceMetals and Non-Metals2 Marks
Question
Why does aluminium not corrode right through?
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Answer

Aluminium does not corrode right through because aluminium is more reactive than iron and it forms a layer of aluminium oxide as soon as it comes in contact with moist air.
This aluminium oxide layer is very tough and prevents the aluminium underneath from corroding.

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