期刊
SENSORS AND ACTUATORS B-CHEMICAL
卷 222, 期 -, 页码 407-418出版社
ELSEVIER SCIENCE SA
DOI: 10.1016/j.snb.2015.07.056
关键词
Chloride ion; Sensor; Potentiometric; Corrosion; Thick-film; Concrete
资金
- Universitat Politecnica de Valencia
In order to monitor the chloride penetration processes, a potentiometric embedded thick-film sensor was developed. This paper includes the results of research on the characterization of Cl- sensors made of Ag/AgCl resistive pastes (materials, sensitivity and detection limit, reproducibility, reversibility and response time, long-term performance and reliability in the presence of interfering agents). Theoretical expressions have been developed to describe the potentiometric response including the presence of OH- bromide ions. The study shows that thick-film sensors are able to monitor Cl- activity as a function of the redox potential. Sensors are also capable of providing reliable and continuous real-time information on phenomena related to the progress of the chloride penetration front in concrete specimens. These sensors are a promising tool because thick-film technology allows us to obtain miniaturized, low-cost, robust and stable long-term sensors for Cl- monitoring. (C) 2015 Elsevier B.V. All rights reserved.
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