Fig. 5. XRD patterns of PF-670462 coating on samples treated in Baths A and B.Figure optionsDownload full-size imageDownload high-quality image (153 K)Download as PowerPoint slide
Fig. 6. (a) Impedance data of the EPC-treated samples and the fitting results of their impedance plots based on the equivalent circuit model and (b) equivalent circuit model used for analyzing present impedance results.Figure optionsDownload full-size imageDownload high-quality image (236 K)Download as PowerPoint slide
The effect of the incorporation of ZrO2 particles on the corrosion response of the low-carbon steel sample was processed by EPC method. ZrO2 particles were successfully incorporated in the Al2O3 coating layer on the present sample during EPC process in the alkaline electrolyte. These particles were uniformly distributed in the interior of the coating layer. Interestingly, the fraction of the microdefects of the sample treated in Bath B was lower than radioactive decay in Bath A due to the beneficial effect of the ZrO2 particles clogging the micropores. From the electrochemical results by EIS tests, the corrosion resistance of the sample in Bath B was higher than that in Bath A, which was consistent with the analysis in the context of the equivalent circuit model.