Evaluation of Capacitor Sensor Performancein Reinforced Concrete for Corrosion Monitoring

Rahman, Siti Fatimah Abdul; Ismail, Mohammad; Noor, Norhazilan Md.; Bakhtiar, Hazri; Yahaya, Nordin; Rashid, Ahmad Safuan A.
April 2013
Advances in Natural & Applied Sciences;Apr-Jun2013, Vol. 7 Issue 2, p179
Academic Journal
In this paper, a capacitor sensor was developed with intention to detect and evaluate corrosion activity in reinforced concrete slab sample. The performance of capacitor sensor was evaluated to determine the workability of the sensor in detecting impedance pattern when embedded in concrete structure. The diameter of impedance pattern can give the polarization resistance which is useful to calculate corrosion rate for future development. This was done by detecting the impedance Nyquist plot of concretesample. The capacitor sensor was tied to the reinforcement bar and the sample was immersed in 3.5% NaCl solution for seven days. The result shows that the capacitor sensor is fully functional in detecting impedance pattern. Hence, demonstrates potential capability of the sensor in measuring corrosion activity in concrete.


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