ChemInform Abstract: Formation and Breakdown of Anodic Oxide Films on Aluminum in Boric Acid/Borate Solutions.

Abstract

Formation and Breakdown of Anodic Oxide Films on Aluminum in Boric Acid/Borate Solutions.-The effect of borate concentration on the formation and breakdown of anodic films on Al at a current density of 25 A/m2 at 293 K is studied in 0.5 M H3BO3/0, 0.005, or 0.05 M Na2B4O7·10H2O solutions by ICP-AES, EL, PL, FE-SEM, TEM, and EIS. Differences in the film formation and breakdown between boric acid/borate and boric acid solutions are discussed in terms of the pH-buffering ability of the solutions. The electronic structure of the anodic oxide films is correlated with the electroand photoluminescence spectra. -(LI, Y.; SHIMADA, H.; SAKAIRI, M.; SHIGYO, K.; TAKAHASHI, H.; SEO, M.; J.

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