Q:
What is Galvanic Corrosion?



A:
  • GALVANIC CORROSION :

  • Potential difference between dissimilar metals in a
    conductive solution, more active one is the anode and more
    noble one is the cathode -- galvanic series for electrolyte of
    interest gives anode/cathode relations, but not the rate of
    corrosion.

  • Examples commonly occur when dissimilar materials
    are joined, as in the examples below of galvanic corrosion
    of painted steel auto body panel in contact with stainless
    steel wheel opening molding, and galvanic corrosion of steel
    pipe at brass fitting in humid marine atmosphere.