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Long-term hybrid galvanic corrosion protection of reinforced-concrete structures

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journal contribution
posted on 28.08.2019, 10:53 by Christian Christodoulou, Wayne Dodds, Chris GoodierChris Goodier, Christian Stone
Hybrid corrosion protection (HCP) can be used to provide corrosion arrest and prevention in degrading reinforced-concrete structures to increase their service life. The proprietary technology is a relatively new electrochemical treatment for concrete structures, having been patented in 2005 (patent GB2426008B). Due to this fact, accurate and reliable empirical data over the life span of a structure protected by an HCP system does not yet exist. This paper is the first to present over 10 years of empirical data, from one of the very first installations of HCP, providing a rigorous and reliable assessment of the structure's long-term performance. Results demonstrate that hybrid galvanic anodes exhibit a responsive behaviour to maintain the concrete environment and respond to corrosion hazards. Even after prolonged periods of low current output, the anodes respond to changing environmental conditions, providing the higher current output required to afford the necessary polarisation to the reinforcement, and hence the protection to the structure. Steel potentials also continued to trend towards more positive values, a generally agreed indication of passive reinforcement. Overall, this study is unique, being the first to present continuous, long-term performance data on hybrid galvanic anodes for the corrosion protection of reinforced-concrete structures.

History

School

  • Architecture, Building and Civil Engineering

Published in

Proceedings of the Institution of Civil Engineers - Construction Materials

Publisher

Thomas Telford Ltd. (ICE Publishing)

Version

AM (Accepted Manuscript)

Rights holder

© ICE Publishing

Publisher statement

This paper was accepted for publication in the journal Proceedings of the Institution of Civil Engineers - Construction Materials and the definitive published version is available at https://doi.org/10.1680/jcoma.19.00018.

Acceptance date

11/07/2019

Publication date

2019-07-22

Copyright date

2019

ISSN

1747-650X

eISSN

1747-6518

Language

en

Depositor

Dr Chris Goodier

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