Explain electroplating ❤❤❤❤
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Answer:
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Explanation:
Electroplating is a process that uses an electric current to reduce dissolved metal cations so that they form a thin coherent metal coating on an electrode. The term is also used for electrical oxidation of anions on to a solid substrate, as in the formation of silver chloride on silver wire to make silver/silver-chloride electrodes. Electroplating is primarily used to change the surface properties of an object (such as abrasion and wear resistance, corrosion protection, lubricity, aesthetic qualities), but may also be used to build up thickness on undersized parts or to form objects by electroforming.
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 ions that permit the flow of electricity. A power supply 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 and thus the ions in the electrolyte bath are continuously replenished by the anode.
Other electroplating processes may use a non-consumable anode such as lead or carbon. In these techniques, ions of the metal to be plated must be periodically replenished in the bath as they are drawn out of the solution.] The most common form of electroplating is used for creating coins, such as US pennies, which are made of zinc covered in a layer of copper.
Electropolishing, a process that uses an electric current to remove metal cations from the surface of a metal object, may be thought of as the opposite of electroplating.
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☆ Electroplating ☆
Electroplating is one of the various applications of electrolysis. In this method, a metal object is coated with a thin layer of another method metal.
The process of coating of a metal object with another metal with the help of electrolysis is called electroplating.
The process of electroplating is done by using electrolytic cell. The object to be electroplated is called as cathode and connected to the negative terminal of a battery on D.C. source. The metal object that is to be coated/deposited over is used as anode and it is connected to the positive terminal of the battery. The electrolyte used for electroplating should be a water soluble salt of the metal to be coated/deposited. For example, if a drink played is to be electroplated with copper metal we use copper as an anode and the zinc plate as cathode. The electrolyte used in this case is copper sulphate solution. Similarly, if a substance made of iron is to be electroplated with silver we use the iron substance as cathode and the Silver metal rod/plate as anode.