Galvanic Series

The galvanic series refers to the ordered list of materials any two of which undergo galvanic corrosion when placed in an electrolyte and electrically connected. This chemical system is referred to as a galvanic cell. The corrosion rate is increased the further apart the two in terms of nobility. This difference can be measured in voltage potential.

Put simply: In a galvanic cell the least noble material is electrolytically dissolved over time.

The galvanic series for commonly encountered materials in seawater with most noble at the top is as follows: