Investigating effects of potential excursions and pH variations on cathodic protection using new electrochemical testing cells

Huo, Y., Tan, M.Y.J and Forsyth, M. 2016, Investigating effects of potential excursions and pH variations on cathodic protection using new electrochemical testing cells, Corrosion engineering, science and technology, vol. 51, no. 3, pp. 171-178, doi: 10.1179/1743278215Y.0000000044.

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Title Investigating effects of potential excursions and pH variations on cathodic protection using new electrochemical testing cells
Author(s) Huo, Y.
Tan, M.Y.JORCID iD for Tan, M.Y.J orcid.org/0000-0002-0765-108X
Forsyth, M.ORCID iD for Forsyth, M. orcid.org/0000-0002-4273-8105
Journal name Corrosion engineering, science and technology
Volume number 51
Issue number 3
Start page 171
End page 178
Total pages 8
Publisher Taylor & Francis
Place of publication Abingdon, Eng.
Publication date 2016
ISSN 1478-422X
1743-2782
Keyword(s) steel
pipeline
soil corrosion
cathodic protection
stray current corrosion
electrochemical cell
electrochemical testing
Summary Excursion from safe cathodic protection (CP) potentials occurs on buried steel pipelines due to various forms of electrical interferences such as stray currents. Variations in pH can also occur over some pipeline sections such as seashore and river crossing pipes. Currently, the exact effects of potential excursion and the pH on CP efficiency have not been sufficiently quantified preliminary due to difficulties in measuring these effects. In this work, these effects have been investigated using electrochemical cells designed to mimic the high resistivity and pH conditions observable over underground steel pipes, including a new electrochemical cell that has been designed to facilitate the effective simulation and control of pH, potential excursion and other CP testing parameters. The pH has been shown to be a key factor affecting the patterns of corrosion and CP efficiency. Localised corrosion has been found to be the dominating form of corrosion under potential excursions conditions.
Language eng
DOI 10.1179/1743278215Y.0000000044
Field of Research 091207 Metals and Alloy Materials
030604 Electrochemistry
Socio Economic Objective 870302 Metals (e.g. Composites
HERDC Research category C1 Refereed article in a scholarly journal
ERA Research output type C Journal article
Copyright notice ©2016, Institute of Materials, Minerals and Mining
Persistent URL http://hdl.handle.net/10536/DRO/DU:30084261

Document type: Journal Article
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