Define electroplating . explain the process of electroplating with the help of a suitable diagram. Write down any two uses of electroplating
Answers
Answer:
Electroplating is a general name for processes that create a metal coating on a solid substrate through the reduction of cations of that metal by means of a direct electric current. The part to be coated acts as the cathode (negative electrode) of an electrolytic cell; the electrolyte is a solution of a salt of the metal to be coated; and the anode (positive electrode) is usually either a block of that metal, or of some inert conductive material. The current is provided by an external power supply.
Copper electroplating machine for layering PCBs
Electroplating is widely used in industry and decorative arts to improve the surface qualities of objects—such as resistance to abrasion and corrosion, lubricity, reflectivity, electrical conductivity, or appearance. It may also be used to build up thickness on undersized or worn-out parts, or to manufacture metal plates with complex shape, a process called electroforming. It is also used to purify metals such as copper.
The term "electroplating" may also be used occasionally for processes that use an electric current to achieve oxidation of anions on to a solid substrate, as in the formation of silver chloride on silver wire to make silver/silver-chloride electrodes.
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
Electroplating comes with several material capabilities. The materials used in the plating (coating) process depend on the composition of the plating bath and the deposition conditions. Here are the most commonly used materials:
Nickel
Black nickel/chromium
Chromium
Palladium or Palladium Nickel Alloy
Gold
Silver
Copper
Tin
Platinum
Ruthenium
Cadmium
Brass
Zinc
Answer:
The process of depositing a layer of a non corrosive metal over a corrosive metal like iron is called electroplating.
Uses
it prevents corrosion of metals
it increases the durability of metals