Back تآكل جلفاني Arabic Corrosió galvànica Catalan Galvanisk tæring Danish Bimetallkorrosion German Corrosión galvánica Spanish خوردگی گالوانیک Persian Galvaaninen korroosio Finnish द्विधात्विक संक्षारण Hindi Elektrokemijska korozija Croatian Korosi galvanik ID
Galvanic corrosion (also called bimetallic corrosion or dissimilar metal corrosion) is an electrochemical process in which one metal corrodes preferentially when it is in electrical contact with another, in the presence of an electrolyte. A similar galvanic reaction is exploited in primary cells to generate a useful electrical voltage to power portable devices. This phenomenon is named after Italian physician Luigi Galvani (1737–1798).
A similar type of corrosion caused by the presence of an external electric current is called electrolytic corrosion.