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An embedded multi-parameter corrosion sensor for reinforced concrete structures / H. Yu in Materials and corrosion, Vol. 63 N° 11 (Novembre 2012) 

Public ISBD [article]  in Materials and corrosion > Vol. 63 N° 11 (Novembre 2012) . - pp. 1011–1016 Titre : An embedded multi-parameter corrosion sensor for reinforced concrete structures Type de document : texte imprimé Auteurs : H. Yu, Auteur ; L. Caseres, Auteur Année de publication : 2014 Article en page(s) : pp. 1011–1016 Note générale : Génie mécanique Langues : Anglais (eng) Mots-clés : Chloride  threshold  concentration;  corrosion  sensor;  linear  polarization  resistance  (LPR);  reinforcing  steel  bar  (rebar);  simulated  pore  solutions  (SPSs) Résumé : A prototype of an embedded corrosion sensor has been developed for assessing the corrosion status of reinforcing steel bar (rebar) in concrete. The integrated sensor unit includes an Ag/AgCl probe, a metallic oxide probe, a multi-electrode array sensor (MAS), and a four-pin (Wenner) array stainless steel electrode for chloride content, pH, microcell corrosion current, and localized concrete resistivity measurements, respectively. A stable solid probe was used as the reference probe in this unit to express the potentiometric measurement of chloride content and pH probes. In this study, the chloride and pH probes were calibrated in simulated pore solutions (SPSs) regarding temperature and pH fluctuations. The corrosion current results of the MAS probe in SPSs matched very well with those obtained by the linear polarization resistance technique, which was conducted on companion carbon steel specimens. A sensor prototype was embedded into a paste cylinder for long-term performance evaluation. Up-to-date results show that the sensor probes exhibit excellent sensitivity and reliability through 1 year of monitoring. Continuous monitoring in the laboratory for extended periods is underway. En ligne : http://onlinelibrary.wiley.com/doi/10.1002/maco.201106113/abstract [article] An embedded multi-parameter corrosion sensor for reinforced concrete structures [texte imprimé] / H. Yu, Auteur ; L. Caseres, Auteur . - 2014 . - pp. 1011–1016. Génie mécanique Langues : Anglais (eng) in Materials and corrosion > Vol. 63 N° 11 (Novembre 2012) . - pp. 1011–1016 Mots-clés : Chloride  threshold  concentration;  corrosion  sensor;  linear  polarization  resistance  (LPR);  reinforcing  steel  bar  (rebar);  simulated  pore  solutions  (SPSs) Résumé : A prototype of an embedded corrosion sensor has been developed for assessing the corrosion status of reinforcing steel bar (rebar) in concrete. The integrated sensor unit includes an Ag/AgCl probe, a metallic oxide probe, a multi-electrode array sensor (MAS), and a four-pin (Wenner) array stainless steel electrode for chloride content, pH, microcell corrosion current, and localized concrete resistivity measurements, respectively. A stable solid probe was used as the reference probe in this unit to express the potentiometric measurement of chloride content and pH probes. In this study, the chloride and pH probes were calibrated in simulated pore solutions (SPSs) regarding temperature and pH fluctuations. The corrosion current results of the MAS probe in SPSs matched very well with those obtained by the linear polarization resistance technique, which was conducted on companion carbon steel specimens. A sensor prototype was embedded into a paste cylinder for long-term performance evaluation. Up-to-date results show that the sensor probes exhibit excellent sensitivity and reliability through 1 year of monitoring. Continuous monitoring in the laboratory for extended periods is underway. En ligne : http://onlinelibrary.wiley.com/doi/10.1002/maco.201106113/abstract