What is electrochemical corrosion ?

Zn ——–   Zn 2+ + 2e- (Oxidation)

Thus it is evident that the corrosion occurs at the anode metal; while the cathodic part is protected from the attack.

MGA21

Example:
  • Steel screws in a brass marine hardware
  • Lead-antimony solder around copper wise;
  • a steel propeller shaft in bronze bearing
  • Steel pipe connected to copper plumbing.

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