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rusting of iron is quicker in saline water than ordinary water.why

Rusting of iron is an oxidation process, i.e. removal of electrons, due to presence of salts (mainly NaCl) in saline water it behaves as an electrolyte. Thus, removal of electrons is favoured hence iron rusts faster.

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We know that rust does not easily form in dry climate, but in a wet climate the oxygen can access the metal more easily through the water vapor, and rust occurs much faster.

In saline water, NaCl dissociates water (H2O) into H+and OH-ions, hence H+ions (which ofcourse is a metal) are easily accessible by oxygen and result in increased rate of rusting of iron when compared to that of ordinary water.

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