Double-layer effects corrosion-rate measurements

J. Devay and L. Meszaros [1980] Study of the Rate of Corrosion of Metals by a Faradaic Distortion Method. II. Effect of the Ohmic Resistance and Capacity of the Double Layer on the Measurement of the Harmonic Components of the Faradaic Currents, Acta Chim. Acad. Sci. Hung. 104, 311. 

The effect of changing system parameters (e.g., corrosion potential, Tafel slopes, etc.) has been treated qualitatively. The effect of double-layer charging time has also been dis-cussed. " In most cases, the charging time is negligible compared to the usual measurement times, but unreasonably long measurement times, on the order of hours, may be required for systems with very low conductivity solutions and for low corrosion rates (that is, when the rc time constant of the double layer is large). For transient experimental techniques, the time-dependent effects manifest themselves as frequency or scan-rate dependence of the results. - -... 

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