Fifth CorroZoom Season 3 Webinar- Kevin Ogle
Fifth CorroZoom Season 3 Webinar - Kevin Ogle
26 April 2023 at 0800 US Eastern
Element-resolved electrochemistry and its application to aqueous corrosion
Ecole Nationale Supérieure de Chimie de Paris, PSL University in Paris, France
Aqueous metallic corrosion is an electrochemical phenomenon and much of the theory and experimental techniques for predicting and assessing corrosion are based on the application of electrochemical concepts and techniques. While electrochemical measurements provide rich and meaningful kinetic information on the underlying faradaic processes, they are often insufficient to identify the chemical mechanisms of these processes, limiting their utility as predictive tools. Element-resolved electrochemistry, specifically atomic emission spectroelectrochemistry (AESEC), is an emerging technique that provides elemental resolution to conventional electrochemical methods. In this way we can quantitatively probe the “fate” of the elemental constituents of a material in real time during its reaction with an aggressive electrolyte. The kinetics of selective dissolution, surface enrichment, and non-faradaic processes such as oxide dissolution or particle detachment - not apparent in conventional electrochemical methods - may be directly measured with quantitative time resolution difficult to achieve by ex situ analysis. In this presentation we will review the methodology of AESEC and its application to a variety of aqueous corrosion phenomena including the passivation of multi-principal element alloys, anomalous hydrogen production on magnesium, and the pickling of aluminum alloys.
Kevin Ogle is a professor at the Ecole Nationale Supérieure de Chimie de Paris, PSL University in Paris, France and a research affiliation with the Institut de Recherche de Chimie-Paris, CNRS. He earned the PhD in Chemistry from the University of Texas at Austin, his dissertation work on the kinetics of heterogenous catalysis by single crystal surfaces using operando surface analytical techniques. After several years at Lawrence Berkeley Laboratory and a brief period as professor at a liberal arts college, he entered the R&D of the European steel industry (today ArcelorMittal) in the area of corrosion and surface treatment. There he pursued fundamental research on the use of local electrochemical techniques and the development of atomic emission spectroelectrochemistry (AESEC). He joined the faculty of the ENSCP in 2005 and continues research with element resolved electrochemistry in several areas of aqueous corrosion and surface treatment processes.