Question

Aluminium metal gets corroded or 'rusted' in places that are near to the sea, because the oxide film that protects it:

• A. is attacked by salt from sea water
• B. reacts with water
• C. is removed by sea water
• D. reacts with sand particles

Answer 1

The correct option is A is attacked by salt from sea water

The presence of salt (or any electrolyte) in the water accelerates the reaction because it increases the conductivity of water, effectively increasing the concentration of ions in the water and so increasing the rate of oxidation (corrosion) of the metal.

Thusm aluminium metal is corroded in places that are near to the sea.