Classically, both anodic and cathodic polarization measurements are required to evaluate the corrosion current (l*) as well as the two Tafel slopes (ba, bc). These three quantities are sufficient to characterize the corrosion kinetics of most corroding metal systems. It is possible, however, to evaluate the three parameters from anodic polarization measurements only, or from cathodic polarization measurements only. A novel method of doing this is presented here. Experimentally, the method is a quick one in that it requires current measurements at only three applied anodic potentials, or alternatively at three cathodic potentials.
A majority of corroding electrodes obey the current/potential relation,
where I* is the corrosion current (at potential E*),...
