Electrochemical Impedance Spectroscopy during Exfoliation Corrosion Process of 2B96K Al-Li Alloy

The electrochemical impedance spectroscopy (EIS) during exfoliation corrosion process of 2B96K Al-Li alloy with different aging treatments in EXCO solution was studied.At the beginning of corrosion,the EIS was comprised of a capacitive arc and an inductive loop.Once exfoliation corrosion occurred,two capacitive arcs appeared.The longer appearance time of two capacitive arcs of the under-aged alloy indicated its slower corrosion development.The simulated EIS analysis was done,the information such as developing and feature of exfoliation corrosion was goet.