Equivalent circuit model degraded polymer coating

Figure 40 Equivalent circuit models for analyzing impedance data from degraded polymer coated metals, (a) General model, (b) Model I for coatings with defects corroding under activation control, (c) Model II for coatings with defects corroding under diffusion control. (From F. Mansfeld, M. W. Kendig, S. Tsai. Corrosion 38, 478 (1982) and M. Kendig, J. Scully. Corrosion 46, 22 (1990).)...

Figure 43 Equivalent circuit model for a degraded polymer coating on a metal substrate and the corresponding EIS data presented in Bode plot format. The breakpoint frequency is indicated as/b in the plot. (From C. H. Tsai, F. Mansfeld. Corrosion 49, 726 (1993).)...

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