Abstract A novel technique for obtaining a polarization resistance from electrochemical noise data is described. Based on parallel measurements of polarization resistance using the LPR technique on stainless steel (430), Self Linear Polarization Resistance (SLPR) provides an accurate means of obtaining polarization resistance with nominally similar electrodes. Results indicate that SLPR provides a better estimate of polarization resistance than noise resistance or spectral noise resistance. Self Linear Polarization Resistance is obtained by removing the average from potential and current data and then obtaining the slope of detrended potential versus detrended current. This treatment of electrochemical noise data reveals perturbations from Ecorr that are initiated by localized corrosion events. The use of SLPR with dissimilar electrodes is demonstrated with samples of Monel 400(1)and nickel aluminum bronze that were galvanically coupled to a counter electrode.