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During anodising of Al–Cu alloys, copper species are incorporated into the anodic alumina film, where they migrate outward faster than Al 3+ ions. In the present study of an Al–1at.% Cu alloy, the valence state of the incorporated copper species was investigated by X-ray photoelectron spectroscopy, revealing the presence of Cu 2+ ions within the amorphous alumina film. However, extended...
By anodizing of a thin layer of A1-0.5 at.% Cr alloy, ca. 54 nm thick, superimposed on electropolished superpure aluminium, chromium species are incorporated into the anodic alumina as a thin band ca. 3 nm thick. This allows the relative mobility of chromium species, with respect to aluminium ions, to be determined, providing key information to assist development of insight into ionic transport processes...
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