How would you prevent rusting in iron objects? Discuss with relev… - Vidyadip

Question

How would you prevent rusting in iron objects? Discuss with relevant chemical reactions.

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Answer

To prevent rusting in iron objects, create a barrier between the iron, oxygen, and water.
This can be achieved through methods like painting, coating with oil or grease, or galvanizing (coating with zinc).
Example: galvanization works because zinc corrodes preferentially, protecting the iron.
Chemically, the main reaction for rusting is:
$4 Fe +3 O _2+6 H _2 O \rightarrow 4 Fe ( OH )_3$

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