Abstract
Adhesion of gas bubbles upon electrode surfaces of a conductimetric cell causes a reduction in the effective surface area of the electrodes and hence leads to false estimations of measured conductivities. By considering the random dispersal of bubbles on the electrode surfaces, the increase of interelectrode resistance due to bubble adhesion is determined as a function of the fractional surface area covered by the gas bubbles. An experimental study using an electrolytic tank with electrodes partially covered by spherical Styrofoam (insulating) spheres (which simulate the gas bubbles) is carried out. Computed results due to the present model and those of other existing models (based on Maxwell's and Bruggeman's formulations) are compared with the measured data.
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