Evaluation of embeddable potential sensor for corrosion monitoring in concrete structures
Evaluation of embeddable potential sensor for corrosion monitoring in concrete structures
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DOI：
10.1016/j.electacta.2008.04.078
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发表时间：
2008-10-15
影响因子：
6.6
通讯作者：
Palaniswamy, N.
中科院分区：
文献类型：
--
作者：
Muralidharan, S.;Saraswathy, V.;Palaniswamy, N.
在混凝土中组装并表征了基于MnO 2的埋入式电位传感器。研究了该器件的稳定性、可逆性、极化率和阻抗特性。采用不同的电化学方法监测了钢筋对MnO 2传感器的腐蚀性能。MnO 2传感器的可逆性表明，正向和反向扫描之间的+/-5 mV的差异表明在混凝土中具有较好的可逆性特性。在混凝土中钢筋的被动和主动条件下，钢筋相对于MnO 2的电位（E-R）分别为-315和-525 mV。动电位极化的腐蚀电流和交流极化的R-ct。阻抗技术清楚地区分行为的钢埋在氯化物污染的混凝土（主动条件）从未污染的混凝土（被动条件）相对于MnO 2传感器。所有这些研究表明，混凝土中的钢筋腐蚀监测使用嵌入MnO 2作为一个更好的电位传感器的混凝土中的钢筋。此外，它易于制造，可根据混凝土结构中腐蚀监测的要求进行可靠的组装和各种配置。(c)2008爱思唯尔有限公司保留所有权利。
Embeddable potential sensor based on MnO2 was assembled and characterised in concrete. The stability, reversibility, polarisability and impedance characteristics have been Studied with respect to known reference. The corrosion performance of reinforced steel with respect to MnO2 sensor was monitored by different electrochemical techniques. Reversibility of MnO2 sensor indicated that difference of +/- 5 mV between the forward and reverse scan indicates the better reversibility characteristics in concrete. The rebar potentials (E-R) of steel with respect to MnO2 are -315 and -525 mV for passive and active conditions of rebar in concrete. The corrosion current from potentiodynamic polarisation and R-ct from a.c. impedance technique clearly differentiated the behaviour of steel embedded in chloride contaminated concrete (active condition) from uncontaminated concrete (passive condition) with respect to MnO2 sensor. All these studies revealed that corrosion monitoring of steel in concrete using embedded MnO2 as a better potential sensor for steel in concrete. In addition it is easy to fabricate for amenable miniaturisation, varied configuration as demanded for corrosion monitoring in concrete structures. (c) 2008 Elsevier Ltd. All rights reserved.