Previous work by the authors examines the forces acting on colloidal particles above electrode surfaces in low frequency electric fields. One of these forces, the faradaically coupled electroosmotic force, is believed to be responsible for electrolyte dependent aggregation or separation of particles in ac electric fields. This force is dependent on the zeta potential of the electrode surface during the application of an electric current. The zeta potential of surfaces is easily measured in the absence of applied current via streaming potential or streaming current measurements. Zeta potential measurements of electrodes while passing current have not yet been made. In separate studies, Prieve and Duval modeled the predicted changes in zeta potential with the application of current. This contribution builds upon those modeling results with the addition of experimental measurements.