Galvanic corrosion generally results from wet insulation with an electrolyte or salt present that allows a current flow between dissimilar metals (i.e., the insulated metal surface and the outer jacket or accessories). The extent and severity of the attack on the less noble metal depends not only on the difference in potential of the two metals, but also on their relative areas. The complete galvanic series and the voltage potential for each metal or alloy appear in handbooks and other standard references. The mechanism of galvanic corrosion is detailed by G. Butler and H. C. Ison in "Corrosion and Its Prevention in Waters."