Electroplating | Definition, Principle, Process And Uses Last Updated : 13 Feb, 2024 Comments Improve Suggest changes Like Article Like Report Electroplating refers to the process of coating a metal onto another metal or alloy with the help of an electric current. It is also known as electrochemical deposition or electrodeposition. Let's learn the electroplating process in detail, including its working principle, advantages, examples and uses. Table of Content What is Electroplating?Setup for ElectroplatingElectroplating Examples Electroplating- TypesElectroplating Process- Principle Electroplating Process- WorkingFactors affecting ElectroplatingElectroplating- AdvantagesElectroplating- Applications Electroplating DefinitionElectroplating is a process of coating or plating a metal onto another by hydrolysis It is usually done to avoid metal corrosion or for ornamental purposes. The setup of Electroplating involves the following components: Anode: The metal to be used for coatingCathode: The metal on which coating is to be done.Electrolyte: It should be the aqueous salt solution of anode metal.Power Source: Usually DC supplyFor instance, Electroplating is done with a brine or acidic or basic or metal salt solution, a battery, wires, and alligator clips that hold carbon rods attached to the metal to be electroplated and the metal to be stacked in an electroplating device. Electroplating PrincipleElectroplating is based on the principle that, When two metals acting as electrodes are immersed in the salt of anode metal and a potential difference is created between them by supplying current, then the metal on the anode oxidizes and dissolves into the electrolyte salt and later gets reduced and deposit itself as a thin layer on the metal on cathode. Electroplating Process The working principle of Electroplating can be better understood by the following example: Let’s take an example of a gold coating. In this instance, a layer of gold is to be electrodeposited on metallic jewelry to enhance its appearance. The gold plate is connected to the anode (positively charged electrode) of the circuit and the jewelry on which coating is to be done is kept at the cathode (negatively charged electrode). Both are kept immersed in a highly developed electrolytic bath (solution) of gold. At this stage, a power source is connected which creates a potential difference between the two electrodes, and current starts flowing from the anode which oxidizes the gold atoms from the anode and dissolves them into the solution. These dissolved atoms later get reduced and get deposited on the jewelEry connected to the cathode.Thus by the above process, the jewelry gets a thin layer of gold on it which is chemically bonded and won't be removed easily. However, continuous exposure of it to the atmosphere will degrade the layer. Chemical reactions occur when an electric current passes through a conducting solution. This is called the chemical effect of electric current. Following are some of the chemical consequences of electric current: Due to redox reaction, metal gets depleted from one electrode and deposited on otherBubbles can form at the electrode due to the evolution of gasColor of the solution can change due to displacement reaction.Learn More : Chemical Effect of Electric CurrentFactors Affecting ElectroplatingThese are the factors affecting elctroplating: Current-Voltage level.Electrolyte bath's temperature and chemical makeup.Amount of time that has passed.Distance between the cathode and the anode is the distance between the cathode and the anode.Electroplating TypesVarious types of Electroplating process are, Chromium Plating is the process of electroplating chromium onto a metal item.Tin Plating is the process of electroplating tin onto a metal item generally iron.Nickel Plating is the process of electroplating nickel onto a metal item.Silver Plating is the process of electroplating silver onto a metal item.Gold Plating is the process of electroplating gold onto a metal item.Copper Plating is the process of electroplating copper onto a metal item.Electroplating AdvantagesThe advantages of Electroplating are : Electroplating often reduce the friction of the metal surfaceElectroplating protects the original metal by creating a barrier layerDue to electroplating, adhesive properties of metal increasesElectroplating also adds to the thickness of the overall metalElectroplating UsesSome applications of Electroplating are : To prevent rusting, metals are frequently coated with other metals.Chromium plating is used on bath taps, automobile bumpers, and other similar items to give them a bright, appealing appearance while also resisting scratches and wear.Silver plating is used for flatware and jewellery.Tin cans are created by electroplating tin onto iron and are used to store food. Tin is a less reactive metal than iron. As a result, food does not come into touch with iron and is therefore protected against spoilage.Related : Electrochemical CellsElectrolytic CellsRedox Reactions Comment More infoAdvertise with us Next Article Electroplating | Definition, Principle, Process And Uses A amanarora3dec Follow Improve Article Tags : School Learning Class 8 Chemistry Electrochemistry Chemistry-Class-8 +1 More Similar Reads CBSE Class 8 Science Notes 2023-24 CBSE Class 8 Science Notes 2023-24 is a comprehensive guide for CBSE Class 8 students. The Class 8 syllabus is designed to provide students with a strong foundation in the basic principles of science, including Physics, Chemistry, and Biology, and to encourage them to think scientifically. 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