On the electrochemical response and interfacial properties of steel–Ca(OH)2 and the steel–concrete system measured using galvanostatic pulses

Birbilis, N., Nairn, K. M. and Forsyth, M. 2004, On the electrochemical response and interfacial properties of steel–Ca(OH)2 and the steel–concrete system measured using galvanostatic pulses, Electrochimica acta, vol. 49, no. 25, pp. 4331-4339.

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Title On the electrochemical response and interfacial properties of steel–Ca(OH)2 and the steel–concrete system measured using galvanostatic pulses
Formatted title On the electrochemical response and interfacial properties of steel–Ca(OH)2 and the steel–concrete system measured using galvanostatic pulses
Author(s) Birbilis, N.
Nairn, K. M.
Forsyth, M.
Journal name Electrochimica acta
Volume number 49
Issue number 25
Start page 4331
End page 4339
Publisher Elsevier Science Pub. Co.
Place of publication New York, N.Y.
Publication date 2004-10-01
ISSN 0013-4686
1873-3859
Keyword(s) corrosion
galvanostatic
transient methods
capacitance
interface
double layer
Summary The interfacial properties of the steel–concrete system are examined via a new approach for evaluation of galvanostatic pulse data. This methodology allows for rapid determination of the corrosion activity of steel, and readily yields values for parameters related to corrosion such as the polarisation resistance and interfacial capacitance. The method of analysis is based on the iterative fitting of a non-exponential model based on a modified Kohlrausch–Williams–Watt (KWW) formalism. The transient behaviour of steel in concrete is non-exponential in its form and, when analysed this way, an exponent β can be determined characterising the exponential non-ideality of the transient. This non-ideality parameter is found to differ significantly for actively corroding and passive specimens, thereby serving as a useful index to the level of corrosion being experienced. Furthermore, the investigation of the interfacial characteristics of the system, previously unobtainable in a reproducible manner via other electrochemical methods, reveal information regarding the kinetic factors governing corrosion of steel in concrete.
Language eng
Field of Research 039999 Chemical Sciences not elsewhere classified
Socio Economic Objective 970103 Expanding Knowledge in the Chemical Sciences
HERDC Research category C1.1 Refereed article in a scholarly journal
Copyright notice ©2004, Elsevier Ltd.
Persistent URL http://hdl.handle.net/10536/DRO/DU:30030071

Document type: Journal Article
Collection: Institute for Technology Research and Innovation
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