Fig. 1From: The Use of Electrochemical Techniques for the Characterization of the Corrosion Behavior of Sol–Gel-Coated MetalsSEM micrograph of AA2024-T3 after surface preparation consisting of alkaline degreasing, alkaline etching, and acid etching (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)Back to chapter page