Electrochemical impedance spectroscopy as a tool to measure cathodic disbondment on coated steel surfaces: capabilities and limitations Mahdavi, Fariba, Tan, Mike Y. J. and Forsyth, Maria 2015, Electrochemical impedance spectroscopy as a tool to measure cathodic disbondment on coated steel surfaces: capabilities and limitations, Progress in organic coatings, vol. 88, pp. 23-31, doi: 10.1016/j.porgcoat.2015.06.010. Attached Files Name Description MIMEType Size Downloads Title Electrochemical impedance spectroscopy as a tool to measure cathodic disbondment on coated steel surfaces: capabilities and limitations Author(s) Mahdavi, Fariba orcid.org/0000-0003-1595-212X Tan, Mike Y. J. orcid.org/0000-0002-0765-108X Forsyth, Maria orcid.org/0000-0002-4273-8105 Journal name Progress in organic coatings Volume number 88 Start page 23 End page 31 Total pages 9 Publisher Elsevier Place of publication Amsterdam, The Netherlands Publication date 2015-11 ISSN 0300-9440 Keyword(s) Science & Technology Physical Sciences Technology Chemistry, Applied Materials Science, Coatings & Films Chemistry Materials Science Organic coating Cathodic protection Cathodic disbondment Electrochemical impedance spectroscopy (EIS) ORGANIC COATINGS MILD-STEEL DELAMINATION DEGRADATION PROTECTION CORROSION METALS MECHANISM ADHESION EIS Summary The disbondment of protective organic coatings under excessive cathodic protection potentials is a widely reported coating failure mechanism. Traditional methods of evaluating cathodic disbondment are based on ex situ visual inspection of coated metal surfaces after being exposed to standard cathodic disbondment testing conditions for a long period of time. Although electrochemical impedance spectroscopy (EIS) has been employed as an effective means of evaluating various anti-corrosion properties of organic coatings; its application for assessing the cathodic disbondment resistance of coatings has not been sufficiently exploited. This paper reports an experimental study aimed at developing EIS into a tool for in situ measurement and monitoring of cathodic disbondment of coatings. A clear correlation between EIS parameters and the disbonded coating areas has been confirmed upon short term exposure of epoxy-coated steel electrodes to cathodic disbondment conditions; however the degree of this correlation was found to decrease with the extension of exposure duration. This observation suggests that EIS loses its sensitivity with the propagation of coating disbondment, and that in order to achieve quantitative determination of the coating cathodic disbondment localized EIS measurements are required to measure the parameters related to local disbonded areas. Language eng DOI 10.1016/j.porgcoat.2015.06.010 Field of Research 030301 Chemical Characterisation of Materials 091202 Composite and Hybrid Materials 091207 Metals and Alloy Materials 0912 Materials Engineering 0913 Mechanical Engineering Socio Economic Objective 850604 Energy Transmission and Distribution (excl. Hydrogen) HERDC Research category C1 Refereed article in a scholarly journal ERA Research output type C Journal article Copyright notice ©2015, Elsevier Persistent URL http://hdl.handle.net/10536/DRO/DU:30078728 Document type: Journal Article Collections: Institute for Frontier Materials GTP Research Related Links Link Description Connect to published version Go to link with your DU access privileges     Unless expressly stated otherwise, the copyright for items in DRO is owned by the author, with all rights reserved. Versions Version Filter Type Mon, 05 Oct 2015, 13:28:24 EST Tue, 06 Oct 2015, 04:04:26 EST Tue, 06 Oct 2015, 07:37:26 EST Wed, 14 Oct 2015, 14:34:05 EST Thu, 10 Dec 2015, 09:20:34 EST Sat, 12 Dec 2015, 05:28:32 EST Tue, 19 Apr 2016, 11:48:38 EST Tue, 19 Apr 2016, 11:49:54 EST Fri, 10 Feb 2017, 13:37:02 EST Fri, 10 Feb 2017, 13:39:06 EST Filtered Full Citation counts:   Cited 15 times in TR Web of Science Cited 22 times in Scopus Search Google Scholar Access Statistics: 696 Abstract Views, 3 File Downloads  -  Detailed Statistics Created: Thu, 10 Dec 2015, 09:20:34 EST

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