Linked from
The 12 pages that link to Galvanic corrosion, each with the reason it gives.
CorrosionBroader topic: Dissimilar metals can make one region anodic and intensify its dissolution.
Noble metalRelated: A noble metal can drive corrosion of a less noble metal in electrical contact.
TinplateRelated: Tin and steel form a coupled pair when moisture reaches exposed steel.
Galvanic seriesRelated: The series predicts which coupled material becomes the anode and corrodes.