Fig. 3 ASTM G 59 polarization curves for polarization resistance measurements based on the results from eight independent laboratories for type 430 stainless steel in 1 N H 2 SO 4 . Curve 1 is the mean result, with curves 2 and 3 showing the 95% confidence limits. Source: Ref 21 More

Fig. 3 Three-electrode linear polarization resistance probe schematic. Dimensions given in inches. IL, insertion length. NPT, American National Standard Taper Pipe Thread. Source: Metal Samples, Munford, AL More

Fig. 12 Linear polarization resistance corrosion rates of the three soil probes (not connected to pipeline) and the pipeline potentials of the two experiments as a function of time More

Fig. 6 Instantaneous corrosion rates using polarization resistance ( R p ) for carbon steel exposed in stagnant aerobic or stagnant anaerobic natural seawater. Corrosion rates were higher for the anaerobic exposures (solid lines) than for aerobic exposure (broken lines). R1, R2, R3, and R4 More

Fig. 18 Sample polarization resistance data showing determination of corrosion current density, i corr , from R p . The slope at E oc is called the polarization resistance, R p . The Tafel slopes, b a and b c , must be obtained from anodic and cathodic polarization experiments More