The Galvanic Corrosion Behavior of Dissimilar Metal Couples Used in Automotive Applications

When, two dissimilar metals in metallic contact are exposed to a corrosive environment, there is a tendency for one of the metals to undergo accelerated corrosion and for the other metal to be protected. This type of corrosion is called galvanic corrosion, and it is one of the more common and severe forms of corrosion [1]. Galvanic couples are common because the efficient design of most products requires the use of more than one metal or alloy.