define corrosion give examples
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The gradual eating up of metals by action of air, moisture or a chemical reaction (such as an acid) on their surface is called corrosion. The most commonly seen example of corrosion of metals is rusting of iron i.e the formation of a brown flaky substance on iron objects on exposure to moist air.
4Fe + 3O2 + 2nH2O → 2Fe2O3.nH2O
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Metal gets rusted in the presence of acid and moisture. This process is called corrosion.
Rusting of iron, tarnishing of silver, etc. are the examples of corrosion.
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