Fig. 8
GDOES composition profile of AA2024-T3 pretreated with a ZrO2 sol–gel layer deposited from 0.4 M solution of inorganic precursor 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)