Rusting of `Fe` is quicker in saline water than in ordinary water. Why ?

Explanation

Presence of `Na^(o+)` and `Cl^(c-)` ions in saline water increases the conductance of the solution in contact with the metal surface, which accelerates the formation of `Fe^(2+0` ion and henc that of rust, `Fe_(2)O_(3).Xh_(2)o`.