MSE Seminar: Jichao Li, Electrochemical Characterization of Intermetallic Compounds in AA2024-T3 and Localized Corrosion Morphology of Al-Cu-Mg Alloys at Elevated temperature

Abstract

The localized corrosion behaviors of Al-Cu-Mg alloy AA2024-T3 (Al-4.4Cu-2.5Mg-0.6Mn) at temperature from 10 to 70°C were characterized using a range of experimental techniques and approaches. The electrochemical methods used in this work included collections of polarization curves, open circuit measurements and electrochemical impedance spectroscopy. Foremost among these was a characterization of the electrochemical behavior of constituent particles present in the alloys. Phases studied included Al₂CuMg, Al₇Cu₂Fe, Al₂0Cu₂Mn₃, Al₂Cu and Al 4wt.%Cu. The effect of rare earth metal and vanadate corrosion inhibitors on localized corrosion behaviors was also examined. Data from these electrochemical measurements was compared to the corrosion morphology after exposure to solutions. 

Bio

Jichao Li received his bachelor degree in ferrous metallurgy from University of Science and Technology Beijing China in 2010, and then continued his study as a PhD student for one year. His research was about exploring a novel method to fabricate high nitrogen stainless steel. In 2011, he joined Fontana Corrosion Center in Ohio State University. He likes watching soccer, and his favorite soccer team is Chelsea.