This article describes the various factors that affect the extent of corrosion resulting from galvanic coupling. The factors include galvanic series, polarization behavior, and geometric relationship of metals and alloys. The article briefly discusses the various modes of attack that lead to galvanic corrosion of anodic members. It also explains the three electrochemical techniques of screening tests for predicting galvanic corrosion. The electrochemical techniques comprise of potential measurements, current measurements, and polarization measurements. The article provides a detailed discussion on the performance of alloy groupings. It concludes with information on various control methods that reduce or eliminate galvanic-corrosion effects.

Galvanic corrosion, although listed as one of the forms of corrosion, is considered as a type of corrosion mechanism that is evaluated by modifying the tests used for conventional forms of corrosion. This article focuses on component testing, computer and physical scale modeling, and laboratory testing methods of evaluating galvanic corrosion. The laboratory tests fall into two categories, namely, electrochemical tests and specimen exposures.