Electrochemically monitoring localized corrosion patterns and CP effectiveness under disbonded coatings Varela, Facundo, Forsyth, Maria and Tan, Mike Y. J. 2015, Electrochemically monitoring localized corrosion patterns and CP effectiveness under disbonded coatings, in NACE 2015: Proceedings of the International Corrosion Conference and Expo Series, NACE International, Houston, Tex., pp. 1-10. Attached Files Name Description MIMEType Size Downloads Title Electrochemically monitoring localized corrosion patterns and CP effectiveness under disbonded coatings Author(s) Varela, Facundo orcid.org/0000-0002-9055-7413 Forsyth, Maria orcid.org/0000-0002-4273-8105 Tan, Mike Y. J. orcid.org/0000-0002-0765-108X Conference name NACE Corrosion Conference and Expo (2015 : Dallas, Tex.) Conference location Dallas, Tex. Conference dates 15-19 Mar. 2015 Title of proceedings NACE 2015: Proceedings of the International Corrosion Conference and Expo Series Publication date 2015 Start page 1 End page 10 Total pages 10 Publisher NACE International Place of publication Houston, Tex. Summary This paper presents new experimental evidences on the capability of a novel electrochemical corrosion monitoring sensor, which was recently conceived, for measuring localized corrosion under disbonded pipeline coatings. The sensor's design includes an artificial crevice for simulating the conditions developed under disbonded coatings and an electrode array for measuring current density distribution over its surface. The sensor capabilities were further evaluated by studying the dependency of corrosion patterns and current density distribution on the Cathodic Protection (CP) potential applied upon immersion in an aqueous environment. At the less negative CP potential, a good correlation was found between the inhomogeneous corrosion distribution under the disbonded coating as measured by the sensor and actual metal loss and corrosion attack observed on its surface at the end of the test. At more negative CP potentials no corrosion was detected or observed on the sensor's surface. In addition, characteristic changes in the cathodic current distribution at different CP potentials illustrated the possibility of employing the sensor to obtain valuable feedback on the performance of a given CP setup, without requiring its interruption or compensation of IR-drops. Furthermore, the sensor's capability to detect some of the effects of overprotection were shown at the most negative CP potential applied. ISBN 9781510801882 ISSN 0361-4409 Language eng Field of Research 030301 Chemical Characterisation of Materials 091207 Metals and Alloy Materials 091202 Composite and Hybrid Materials Socio Economic Objective 850604 Energy Transmission and Distribution (excl. Hydrogen) HERDC Research category E1 Full written paper - refereed ERA Research output type E Conference publication Copyright notice ©2015, NACE International Persistent URL http://hdl.handle.net/10536/DRO/DU:30078733 Document type: Conference Paper Collections: Faculty of Science, Engineering and Built Environment School of Engineering Institute for Frontier Materials GTP Research Related Links Link Description   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, 13:29:23 EST Tue, 06 Oct 2015, 04:06:26 EST Tue, 06 Oct 2015, 07:37:34 EST Tue, 26 Apr 2016, 12:27:41 EST Tue, 26 Apr 2016, 12:32:34 EST Tue, 26 Apr 2016, 12:41:16 EST Wed, 27 Apr 2016, 06:06:03 EST Wed, 27 Apr 2016, 08:39:18 EST Fri, 13 May 2016, 14:36:08 EST Fri, 13 May 2016, 14:37:26 EST Wed, 07 Sep 2016, 10:30:18 EST Mon, 15 Jan 2018, 09:33:33 EST Tue, 23 Jan 2018, 11:09:54 EST Filtered Full Citation counts:   Cited 0 times in TR Web of Science Cited 2 times in Scopus Search Google Scholar Access Statistics: 368 Abstract Views, 11 File Downloads  -  Detailed Statistics Created: Tue, 26 Apr 2016, 12:41:16 EST

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