Answer :

Following four factors are responsible for corrosion of Iron:


i) Moisture: Moisture reacts with iron to form rust(Mixture of Iron oxide and water)


ii) Oxygen: Oxygen reacts with iron to form Iron oxide which on combining with moisture becomes rust


iii) Poor maintenance: Poor maintenance leads to continuous exposure of iron to moisture and air which causes rust.


iv) Poorly built iron substances: If other substances like carbon, are not mixed while making iron substances in proper proportions, It gets rusted.


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