Author(s)

J-P. Dasquet, J-P. Bonino, D Caillard, R. Bes

Abstract

The porous oxide layers obtained by various anodic oxidations of 1050 and 2024T3 aluminium alloys are modified by zinc impregnation under alternative voltage. The studied anodizations are a phosphoric anodization (PAO), a boric acid anodization (BAAO) and a boric basic anodization (BBAO). These porous oxide layers were characterised by T.E.M. and E.I.S. : anodization conditions were observed to have a great influence on their porosity. The study of impregnation voltage influence revealed a critical voltage below which zinc deposition is not possible. This critical voltage depends on t

Keywords