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In situ measurement of pipeline coating integrity and corrosion resistance losses under simulated mechanical strains and cathodic protection

Ranade, S., Forsyth, M. and Tan, M.Y.J. 2016, In situ measurement of pipeline coating integrity and corrosion resistance losses under simulated mechanical strains and cathodic protection, Progress in organic coatings, vol. 101, pp. 111-121, doi: 10.1016/j.porgcoat.2016.08.007.

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Title In situ measurement of pipeline coating integrity and corrosion resistance losses under simulated mechanical strains and cathodic protection
Author(s) Ranade, S.ORCID iD for Ranade, S. orcid.org/0000-0002-4110-4872
Forsyth, M.ORCID iD for Forsyth, M. orcid.org/0000-0002-4273-8105
Tan, M.Y.J.ORCID iD for Tan, M.Y.J. orcid.org/0000-0002-0765-108X
Journal name Progress in organic coatings
Volume number 101
Start page 111
End page 121
Total pages 11
Publisher Elsevier
Place of publication Amsterdam, The Netherlands
Publication date 2016-12
ISSN 0300-9440
Keyword(s) pipeline coating
coating testing
coating degradation
mechanical strain
cathodic protection
electrochemical impedance spectroscopy
Summary A novel experimental assembly consisting of a specially designed tensile testing rig and a standard electrochemical flat cell has been designed for simulating buried high pressure pipeline environmental conditions in which a coating gets damaged and degrades under mechanical strain, and for studying the influence of mechanically induced damages such as the cracking of a coating on its anti-corrosion property. The experimental assembly is also capable of applying a cathodic protection (CP) potential simultaneously with the mechanical strain and environmental exposure. The influence of applied mechanical strain as well as extended exposure to the corrosive environment, coupled with the application of CP, has been investigated based on changes in electrochemical impedance spectroscopy (EIS). Preliminary results show that the amplitude of the coating impedance decreases with an increase in the applied strain level and the length of environmental exposure. The EIS characteristics and changes are found to correlate well with variations in coating cracking and degradation features observed on post-test samples using both optical microscopy and scanning electron microscopy. These results demonstrate that this new experimental method can be used to simulate and examine coating behaviour under the effects of complex high pressure pipeline mechanical, electrochemical and environmental conditions.
Language eng
DOI 10.1016/j.porgcoat.2016.08.007
Field of Research 091209 Polymers and Plastics
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 ©2016, Elsevier
Persistent URL http://hdl.handle.net/10536/DRO/DU:30085557

Document type: Journal Article
Collection: Institute for Frontier Materials
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Created: Fri, 19 Aug 2016, 12:51:35 EST

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