Electroplating is the process of applying a thin coating of one metal over another with the help of electrolysis. A corrosive metal coating is applied to a corrosive material made of a corrosive cheap metal. For example, nickel or chromium coating is commonly used on objects made of iron or copper. A bar made of metal is immersed in a salt solution of the metal to be coated and attached to the anode of a battery. The material on which the coating is to be applied is immersed in the solution and electrified by attaching it to the catheter. As a result the cation of the salt present in the solution is attracted to the cathode and the electrons are absorbed and deposited as a metal coating on the object used as the cathode. Meanwhile, the anode metal releases electrons into the solution in the form of ions and maintains the level of cation removed from the solution. For example, in nickel sulphate solution, the nickel rod is electrified using any other material made of anode and laher as a cathode.