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Explain the Method of Impressed Current Cathodic Protection. - Applied Chemistry 2

Short Note

Explain the method of impressed current cathodic protection.

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Solution

Impressed current cathodic protection is to convert anode to cathode by nullifying the rate of corrosion.The structure is connected to D.C.

  • This is done by rectifying a.c ensuring the connection between anode and new electrode.
  • Anode used is an inert material such as graphite,pt etc.
  • Anode is buried in backfill such as gysum to increase the electrical contact between soil and metal.
  • This protection is used for underground structures like water tanks,pipelines,transmission towers etc.
  • The method is better and more efficient than sacrificial anode method.

Concept: Cathodic Protection Impressed Current Method
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