Fig. 10

Potentiodynamic polarization curves in 0.05 M NaCl solution for AA2024-T3 coated with ZrO₂ sol–gel films deposited employing inorganic 0.4 M precursor solution. The figure displays the curves relative to sample coated by spraying technology using a robot-controlled air-pressure gun and by dipping technique. The curve for the bare substrate is 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)