Assessment of the Effectiveness of Butler-Volmer Equation to Predict Corrosion Rate in Cathodically Protected Structures

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Abstract

Various reinforced concrete structure around the world, such as bridges are exposed to aggressive chloride environment, hence, start to corrode after short service period. The main reason for the deterioration of these structures is corrosion of steel
reinforcement due to chlorides. Poor quality concrete and low cover are contributory factors. The cost of repairing or replacing the deteriorated structure has become the major concern for the asset owners. One of the most successful and substantiated
techniques of protecting structure from corrosion is cathodic protection (CP). The BSEN ISO 12696 performance criteria followed for monitoring CP efficiency is evolved from the experimental analysis and may not be always correct. This paper suggests a improved method for monitoring corrosion rate through Butler Volmer equation using the polarization data. This method has been applied to one year CP monitoring data from a viaduct site. It was observed that corrosion rate was reducing with time, showing the effectiveness of CP to protect the steel in structure. Prediction of corrosion rate of the steel from potential shift forms the basis for the improved CP performance criterion for reinforced concrete structures. Information about the actual corrosion rate would be beneficial to predict the true state of steel reinforcement and accordingly apply a suitable repair technique to extend the service life of RC structures.
Original languageEnglish
Title of host publicationFifth International Conference on Sustainable Construction Materials and Technologies (SCMT5)
EditorsEshmaiel Ganjian, Peter Claisse, Mukesh Limbachiya, Mohammadreza Bagheri
Pages353-363
Number of pages10
Volume2
Publication statusPublished - 15 Jul 2019
EventFifth International Conference on Sustainable Construction Materials and Technologies - Kingston upon Thames, United Kingdom
Duration: 14 Jul 201917 Jul 2019
Conference number: 5
https://www.kingston.ac.uk/events/item/2839/14-jul-2019-fifth-international-conference-on-sustainable-construction-materials-and-technologies-scmt5/

Publication series

Name
ISSN (Print)2515-3048
ISSN (Electronic)2515-3056

Conference

ConferenceFifth International Conference on Sustainable Construction Materials and Technologies
Abbreviated titleSCMT5
CountryUnited Kingdom
CityKingston upon Thames
Period14/07/1917/07/19
Internet address

Bibliographical note

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Keywords

  • Corrosion
  • Cathodic Protection
  • Potential Shift
  • Butler Volmer equation
  • Corrosion Rate

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    Goyal, A., Sadeghi Pouya, H., & Ganjian, E. (2019). Assessment of the Effectiveness of Butler-Volmer Equation to Predict Corrosion Rate in Cathodically Protected Structures. In E. Ganjian, P. Claisse, M. Limbachiya, & M. Bagheri (Eds.), Fifth International Conference on Sustainable Construction Materials and Technologies (SCMT5) (Vol. 2, pp. 353-363)