Fig. 7
SEM micrograph of AA2024-T3 coated with ZrO2 sol–gel film deposited employing inorganic 0.4 M precursor solution by spraying technology (up-scaling using a robot-controlled air-pressure gun) (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)