Time-Resolved Monitoring of Buried Hybrid Coating/Metal Oxide Interfacial Interactions Using Orp-Eis Combined With Ftir in Kretschmann Geometry

Interfacial adhesive interactions at the buried coating/metal oxide interface are considered as key prerequisites in durability of the hybrid structures. these buried interfaces are difficult to study using conventional surface analysis techniques. in-situ atr-ftir in kretschmann geometry is a novel methodology capable of monitoring real time interfacial interaction evolutions. in this work, we combined atr-ftir in kretschmann geometry with odd random phase multisine electrochemical impedance spectroscopy (orp-eis), which enables us to investigate electrochemical de-adhesion processes due to ingress of water and ions in technologically relevant conditions. application of orp-eis with instantaneous impedance calculations allows for the monitoring of the electrochemical behavior in the same time frame as the atr-ftir measurements, even in the presence of non-stationarities in the exposed system. in this paper, we highlight how this methodology can measure initial water uptake as the origin of the decrease in barrier properties of the coating followed by swelling/delamination of the coating in the further stages due to the degradation/dilution of the interfacial bonds. separation of the water and ion uptake is also studied through physically meaningful eec modelling. verification of the modelling is done through ftir measurements.

Time-resolved monitoring of buried hybrid coating/metal oxide interfacial interactions using ORP-EIS combined with FTIR in Kretschmann geometry

Interfacial adhesive interactions at the buried coating/metal oxide interface are considered as key prerequisites in durability of the hybrid structures. These buried interfaces are difficult to study using conventional surface analysis techniques. In-situ ATR-FTIR in Kretschmann geometry is a novel methodology capable of monitoring real time interfacial interaction evolutions. In this work, we combined ATR-FTIR in Kretschmann geometry with Odd Random Phase multisine Electrochemical Impedance Spectroscopy (ORP-EIS), which enables us to investigate electrochemical de-adhesion processes due to ingress of water and ions in technologically relevant conditions. Application of ORP-EIS with instantaneous impedance calculations allows for the monitoring of the electrochemical behavior in the same time frame as the ATR-FTIR measurements, even in the presence of non-stationarities in the exposed system. In this paper, we highlight how this methodology can measure initial water uptake as the origin of the decrease in barrier properties of the coating followed by swelling/delamination of the coating in the further stages due to the degradation/dilution of the interfacial bonds. Separation of the water and ion uptake is also studied through physically meaningful EEC modelling. Verification of the modelling is done through FTIR measurements.