On-site corrosion monitoring experience in concrete structures: potential improvements on the current-controlled polarization resistance method

J. E.  Ramón; Á.  Castillo; I.  Martínez

doi:10.3989/mc.2021.11221

Authors

J. E. Ramón Instituto de Ciencias de la Construcción Eduardo Torroja, CSIC https://orcid.org/0000-0002-6765-1735
Á. Castillo Instituto de Ciencias de la Construcción Eduardo Torroja, CSIC https://orcid.org/0000-0003-3525-2577
I. Martínez Instituto de Ciencias de la Construcción Eduardo Torroja, CSIC https://orcid.org/0000-0002-5729-5124

DOI:

https://doi.org/10.3989/mc.2021.11221

Keywords:

Concrete, Steel reinforcement, Corrosion, Durability

Abstract

The need for proactive maintenance of reinforced concrete structures with non-destructive testing (NDT) is less disputable today than ever. One of the most promising strategies in this regard is the in-situ measurement of the reinforcement corrosion rate. This study explored the reliability of modulated current confinement method (hereafter MCC) based on a review of in-situ measurements made with that technique in real-life structures over a 13-year period. The most prominent problems detected included defective confinement of the polarization current in low-resistivity environments and over-polarization of passive reinforcement. The findings, which showed enhancement of MCC reliability to depend on improving the electrochemical current regulation and control methodologies presently in place, are being applied to improve the design of the next generation of corrosion meters.

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