WIT Press


Energetics Of Aluminium Alloys Anodization For Porous Oxide Films Elaboration

Price

Free (open access)

Paper DOI

10.2495/SURF030061

Volume

39

Pages

10

Published

2003

Size

317.76 kb

Author(s)

G. Zamora, L. Arurault & R.S. Bes

Abstract

From recent published data relative to the anodization of 99.9% aluminium and 2024T3 alloy at a given value of the current density, it is established that the energy density WIS is proportional to the anodization time t,. In order to appreciate the applicability of such an empirical relation, we conduct the 1050A alloy anodization at a given value of the anodization voltage V, (industrial procedure) in three different electrolytes (borate, phosphoric acid and boric acid/sulphuric acid). The proportionality coefficient k between WIS and t, appears to increase with the anodization voltage V,, while the charge flow density WV, is a linear function of the anodization voltage V,. The H3B03 + &So4 electrolyte experimental data indicate, nevertheless, a sharp change of the energy transfer from a critical anodization voltag

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