Question

What effect does salt have on corrosion of iron?
a. absolutely none
b. speeds up reaction
c. stops rust in its tracks
d. give off a different type of Rust

Answer 1

Hint: In the given question the effect of salt on the corrosion has been discussed. As we know that Salt is a mineral consisting mainly of sodium chloride (NaCl), Salt crystals are luminous and cubic in shape, this crystal takes part in the corrosion process.

Complete Step by step answer: The process of Corrosion of iron takes place in the presence of air that is oxygen and water. It is seen that rusting is faster in salty water. The surface of metal becomes vulnerable to a vicious electrochemical corrosion in the presence of salts.
The ferrous hydroxide formed does not provide the protective barrier on the metal surface and iron will corrode more rapidly in the continuing presence of chloride metal salts because more dissolved oxygen can reach the surface.
This is occurring because lots of dissociated ions are present in a salt as salt is a strong electrolyte and hence this will tremendously speedup corrosion in salty water.
Thus, salt in water speeds up the reaction.
So, we can say that the effect of salt will speed up the corrosion reaction.

Hence the correct option is b.

Note: The flow of ions through water droplets causes an electrochemical process in which Fe2+ is oxidized to Fe3+ by oxygen and is then converted to rust and at the cathode side, oxygen is reduced. This occurs because electron flow is from anode to cathode through metal. Hydrated iron (III) oxide is we called as rust, it is an oxidation reaction in which iron reacts with water and oxygen