The use of Microelectrode Sensors in the Investigation and Modelling of Sensing Electrodes in Industrial Electrical Impedance Tomographic Applications

摘要

Oxidation, reduction and electrode corrosion processes have been investigated at the surface of a Hastelloy C276 sensing electrode currently being used in an electrical impedance industrial process tomography measurement system. Although degradation and corrosion of the sensor surface was not found to be significant electrode corrosion potentials as large as 330mV were measured. Linear ramp cyclic voltammetry with microelectrode sensors was used to investigate these processes and a novel equivalent circuit model has been developed to aid measurement system optimisation and image reconstruction.