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Cathodic protection works by making the whole structure

  • A.the anode of an electrochemical cell
  • B.electrically insulated from the electrolyte
  • C.chemically inert to the surrounding environment
  • D.the cathode of an electrochemical cell

Answer: D

Forcing electrons into the metal suppresses its anodic dissolution, so the metal cannot corrode while the current is maintained. The oxidation has to occur somewhere, and it is transferred to a sacrificial anode or an inert one.

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