Fig. 22

GDOES semiquantitative composition profile of AA2024 coated with a multilayer sol–gel film containing cerium nitrate. The sol–gel film was deposited using a metal–organic precursor solution with 0.1 M concentration for the first layer and 0.6 M for the second one (Reprinted from Prog Org Coatings, 69, Andreatta F, Paussa L, Aldighieri P, Lanzutti A, Raps D, Fedrizzi L, Corrosion behaviour of sol-gel treated and painted AA2024 aluminium alloy, 133–142, Copyright (2010a), with permission from Elsevier)