Anodic Alumina Prepared in Aqueous Solutions of Chelating Complex Zinc and Cobalt Compounds

Results of galvanostatic anodic oxiding of specially prepared high-purity aluminum in aqueous solutions of complex compounds K3[Co(C2O4)3] and K2[Zn(edta)] with different concentrations in the current-density ranges of, respectively, (1.5–1.10) × 102 and 1.5–30 mA cm–2 are presented. Kinetic features of anodic oxiding indicating the presence of an oscillating electrochemical process are established. The following morphological features atypical of anodic alumina are revealed: "flaky and loose" formations for K2[Zn(edta)] and "monolithic" formations for K3[Co(C2O4)3]. The elemental composition and IR spectroscopic and photoluminescence characteristics of the formed oxides are presented.