Print Email Facebook Twitter The use of odd random phase electrochemical impedance spectroscopy to study lithium-based corrosion inhibition by active protective coatings Title The use of odd random phase electrochemical impedance spectroscopy to study lithium-based corrosion inhibition by active protective coatings Author Meeusen, M. (TU Delft (OLD) MSE-6) Visser, P. (TU Delft (OLD) MSE-6; AkzoNobel) Fernández Macía, L. (Vrije Universiteit Brussel) Hubin, A. (Vrije Universiteit Brussel) Terryn, H.A. (TU Delft (OLD) MSE-1; Vrije Universiteit Brussel) Mol, J.M.C. (TU Delft (OLD) MSE-6) Date 2018 Abstract In this work, the study of the time-dependent behaviour of lithium carbonate based inhibitor technology for the active corrosion protection of aluminium alloy 2024-T3 is presented. Odd random phase electrochemical impedance spectroscopy (ORP-EIS) is selected as the electrochemical tool to study the corrosion protective properties of a model organic coating with and without lithium carbonate as a function of immersion time, by examination of the non-linearities and non-stationarities in the system. A dedicated qualitative and quantitative analysis allows linking the presence of non-stationarities in a certain frequency range with the (un)stable behaviour of different electrochemical processes. Monitoring of the system with and without lithium corrosion inhibitors during the first 12 h after immersion in a 0.05 M NaCl aqueous solution and modelling the ORP-EIS data with equivalent electrical circuit (EEC) models revealed a relation between the trends in the parameter evolution and the (un)stable behaviour of the morphological changes taking place. This paper shows that the ORP-EIS based methodology allows us to study the behaviour of corrosion inhibitors in an alternative way; the time-dependent behaviour of corrosion inhibitor containing electrochemical systems is highlighted, proving that this a useful approach for further corrosion inhibitor and active protective coating research. Subject CorrosionEIS modellingInhibitorOdd random phase EISReliability To reference this document use: http://resolver.tudelft.nl/uuid:e1c4c54d-a3bd-4f1d-a085-01a7160870b3 DOI https://doi.org/10.1016/j.electacta.2018.05.036 ISSN 0013-4686 Source Electrochimica Acta, 278, 363-373 Part of collection Institutional Repository Document type journal article Rights © 2018 M. Meeusen, P. Visser, L. Fernández Macía, A. Hubin, H.A. Terryn, J.M.C. Mol Files PDF 1_s2.0_S0013468618310594_main.pdf 2.78 MB Close viewer /islandora/object/uuid:e1c4c54d-a3bd-4f1d-a085-01a7160870b3/datastream/OBJ/view