About this Abstract |
| Meeting |
2026 TMS Annual Meeting & Exhibition
|
| Symposium
|
Cutting-Edge Characterization and Electrochemical Techniques for Unraveling Corrosion Phenomena
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| Presentation Title |
Combined hydrogen permeation based potentiometry and electrochemical impedance spectroscopy technique to measure cathodic oxygen reduction kinetics at an organic coating/iron interface |
| Author(s) |
Dandapani Vijayshankar, Rasmi Ranjan Tripathy, Stephane Rioual, Benoit Lescop |
| On-Site Speaker (Planned) |
Dandapani Vijayshankar |
| Abstract Scope |
The electrochemical stability of buried organic coating/metal interfaces are critically determined by the kinetics of oxygen reduction reaction (ORR). Conventional techniques such as electrochemical polarization based on polarizing the polymer coated metal electrode measure little or zero current due to ionic resistance of the coating. Over the last decade, a novel hydrogen permeation based potentiometry (HPP) technique has been introduced for quantification of such buried interface kinetics using hydrogen from the back side of the metal membrane as a probe to measure (ORR) on the polymer coated side. Recently, this approach has been further developed by combining it with conventional electrochemical impedance spectroscopy (EIS) to measure correlated charge transfer resistance for ORR and polymer barrier properties during coating degradation. This technique was recently applied to monitor ORR on an industrial metal, iron and the degradation of polymethyl methacrylate (PMMA) coated iron has been studied to reveal its distinct interfacial kinetics. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Sustainability, Surface Modification and Coatings, Environmental Effects |