Fig. 14. Electric equivalent circuits used for fitting the impedance spectra of titanium samples: after degreasing (“as-delivered”), degreasing and etching (“etched”) and after additional anodic polarization at 10 and 30 V at 60 °C for 10 min in DES anodizing bath, recorded after 48 hours exposure in deaerated 0.05 mol dm−3 NaCl solution.
