A wide range of applications of room temperature ionic liquids (RTILs) in various fields inevitablyrequire knowledge about their interaction with devices that are mainly composed of metallic materials.Degradation mechanism of metals and alloys in RTIL systems is supposed to be different from that inconventional aqueous system. We gathered some significant data from previously published papers todiscuss a dissolution or passivation phenomenon that occurs on metallic electrodes in RTIL systems.The following two topics dominate literature on this field: corrosion behavior of metals and alloys inchloroaluminate RTILs, and anodic stability of aluminum in air- and water-stable RTILs. Thecomposition ratio of constituted compounds is the main factor that determines the anodic stability ofmetal/alloys in the chloroaluminate RTILs, while the properties of surface layer formed by reactionsbetween anions and metal ions are the crucial factor in the air- and water-stable RTIL systems.
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