Question

can anyone explain how electroplating is done??

Answer 1

In electroplating a electrode is choosen and through it electicity is passedmwhen electricity passes the solution of an element is deposited on desired metal.

Answer 2

The process used in electroplating is called electrodeposition. It is analogous to a concentration cell acting in reverse . The part to be plated is the cathode of the circuit. In one technique, the anode is made of the metal to be plated on the part. Both components are immersed in a solution called an electrolyte,  containing one or more dissolved metal salts as well as other ionsthat permit the flow of electricity. A power supp supplies a direct current to the anode, oxidizing the metal atoms that it comprises and allowing them to dissolve in the solution. At the cathode, the dissolved metal ions in the electrolyte solution are reduced at the interface between the solution and the cathode, such that they "plate out" onto the cathode. The rate at which the anode is dissolved is equal to the rate at which the cathode is plated, vis-à-vis the current through the circuit. In this manner, the ions in the electrolyte bath are continuously replenished by the anode.