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Homework Help: Galvanic Corrosion

  1. Aug 15, 2012 #1
    1. The problem statement, all variables and given/known data
    In Galvanic Corrosion, does the cathode gain mass, while the anode loses mass?

    2. Relevant equations

    3. The attempt at a solution
    The anode loses electrons to the cathode through the electrode. But i am not sure whether the cathode would gain mass or not. If so, when the anode lose 2g, does that mean the cathode would gain 2g as well?
  2. jcsd
  3. Aug 15, 2012 #2


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    Staff: Mentor

    In galvanic corrosion, one of the metals usually dissolves and the other remains unaffected, e.g., if you leave a lead fishing sinker in the bottom of your aluminium dingy, in the salty water the lead will speed up corrosion of the boat hull in that vicinity, quickly generating a new drain hole. :smile: The sinker gains no weight. http://en.wikipedia.org/wiki/Galvanic_corrosion
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