On-line Magazine 'Sensors & Transducers' (S&T e-Digest)

    (ISSN 1726- 5479)

Vol. 67, Issue 5, May 2006, pp. 553-560

Sensor Systems for Corrosion Monitoring in Concrete Structures

K.Kumar, S.Muralidharan, T.Manjula¹, M.S.Karthikeyan and N.Palaniswamy

Corrosion Protection Division, Central Electrochemical Research Institute, Karaikudi – 630 006, Tamilnadu, India

¹Post-graduate Student, School of Electrical and Electronics Engineering, Control Systems and Instrumentation Department,

SASTRA Deemed University, Thanjavur–613 402, Tamilnadu, India

Received:  10 May 2006   Accepted: 24 May 2006   Published: 29 May 2006

Abstract. It is a need of permanently embedded corrosion monitoring devices to monitor the progress of corrosion problems on a new or existing reinforced concrete structures before embarking on repair or rehabilitation of the structures. Numerous devices are available for investigating corrosion problems, because no single technique exists which tells an engineer what he needs to know, namely how much damage there is on a structure now and how rapidly the damage will grow with time. In this investigation the studies on the sensors systems based on the measurements of half cell potential of rebars inside the concrete, resistivity of concrete, corrosion rate of rebars by eddy current measurements and sensing of chloride ions are reported. An integrated system consists of above sensors are fabricated and embedded into concrete. The response from each sensor was acquired and analyzed by NI hardware through LabVIEW software.

Keywords: sensors, corrosion, concrete structures, sensor systems

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