Galvanic Corrosion: Anode vs. Cathode Mass Gain/Loss

[GuMing]

Homework Statement

In Galvanic Corrosion, does the cathode gain mass, while the anode loses mass?

Homework Equations

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?

 

[NascentOxygen]

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. The sinker gains no weight. http://en.wikipedia.org/wiki/Galvanic_corrosion