期刊
CORROSION SCIENCE
卷 212, 期 -, 页码 -出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.corsci.2022.110919
关键词
ORP-EIS; ATR-FTIR in Kretschmann geometry; Organic coatings; Buried interfaces; Ion diffusion; Spectro-electrochemical technique
This study characterized the separate diffusion of water and ions in a polyethylene glycol diacrylate (PEGDA) coating using an integrated spectro-electrochemical technique. The ingress front position profile of ions in the coating was determined by fitting odd random phase electrochemical impedance spectroscopy (ORP-EIS) data with a physically relevant electrochemical equivalent circuit (EEC). The arrival time of ions at the coating/metal oxide interface was obtained from the EEC and verified through in situ attenuated total reflection Fourier transform infrared spectroscopy (ATR-FTIR) measurements in the Kretschmann geometry integrated in the ORP-EIS set-up.
In this work, the separate diffusion of water and ions through a polyethylene glycol diacrylate (PEGDA) coating was characterized using an integrated spectro-electrochemical technique. The ions ingress front position profile along the thickness of the coating was derived from fitting odd random phase electrochemical impedance spectroscopy (ORP-EIS) data using a physically relevant electrochemical equivalent circuit (EEC). The arrival time of the ions at the coating/metal oxide buried interface obtained from EEC and rapid uptake of water was verified using in situ attenuated total reflection Fourier transform infrared spectroscopy (ATR-FTIR) measure-ments in Kretschmann geometry integrated in the ORP-EIS set-up.
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