Fig. 18

Bode equivalent circuit (a) used to model impedance spectra reported as Bode plot for impedance modulus (b) and phase (c) for ZrO₂-pretreated AA6060 (3dip-150) (Reprinted from Electrochim Acta, 52, Andreatta F, Aldighieri P, Paussa L, Di Maggio R, Rossi S, Fedrizzi L, Electrochemical behaviour of ZrO2 sol-gel pre-treatments on AA6060 aluminium alloy, 7545–7555, Copyright (2007), with permission from Elsevier)