Physics - Chemical Effects of Electric Current
Most of the liquids that conduct electricity belong to solutions of acids, bases and salts.
Some liquids are good conductors and some are poor conductors of electricity.
The passage of an electric current through a conducting liquid normally causes chemical reactions and the resulting effects of this reaction are known as chemical effects of currents.
The process of depositing a layer of any desired metal on another material by means of electricity is known as electroplating.
Electroplating is commonly used in industry for coating metal objects with a thin layer of a different metal.
Coating of zinc is applied on iron to protect it from the corrosion and formation of rust.