Tower Type Sensors for Monitoring Corrosion Risk in Cover-Zone Concrete
In order to monitor corrosion risk in cover-zone concrete, an integrated tower type sensor (TTS) was developed to obtain the electrochemical parameters such as concrete resistance, macro-cell current and the corrosion potential of built-in electrodes. To obtain valid macro-cell current value, specialized short-circuit acquisition time equal to 30 s has been defined in present cement mortar. The results indicate that the macro-cell current increases and cement mortar resistance decreases meanwhile with the content of chloride ions increase in imported chloride cement mortar. The effective measurement of the macro-cell current and cement mortar resistance allows TTS to be used as a corrosion risk monitoring system in cover-zone concrete.
Zhengyi Jiang and Chunliang Zhang
S. Lu et al., "Tower Type Sensors for Monitoring Corrosion Risk in Cover-Zone Concrete", Advanced Materials Research, Vols. 97-101, pp. 4305-4308, 2010