Fig. 25

Potentiodynamic polarization curves in 0.05 M NaCl solution for AA2024-T3 coated with ZrO₂ sol–gel films deposited employing metal–organic 0.1 M precursor solution and containing corrosion inhibitors (2-mercaptobenzothiazole and cerium nitrate). The curves for the ZrO₂ film obtained using metal–organic precursor without inhibitors and for bare substrate are also reported in the figure (Reprinted from Prog Org Coatings, 72, Andreatta F, Paussa L, Lanzutti A, Rosero Navarro NC, Aparicio M, Castro Y, et al., Development and industrial scale-up of ZrO2 coatings and hybrid organic-inorganic coatings used as pre-treatments before painting aluminium alloys, 3–14, Copyright (2011), with permission from Elsevier)