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Describe the cathodic protection of metals from corrosion.

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Corrosion is the phenomenon in which the surface of the metals is corroded due to exposure to the air.

  • Cathodic protection is one of the methods used to prevent corrosion.
  • In this process, the metal to be protected is to be connected to a highly electropositive metal, such as Magnesium (Mg).
  • Magnesium, being more electropositive acts as an anode and the metal to be protected as cathode.
  • In this method, Magnesium prevents oxidation of the metal and protects the metal from Corrosion.
  • Example: Cathodic protection is used to protect Iron from rusting.

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