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Influence of Additions of Water on the Quality of Filled Anodic Oxide Coatings

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Abstract

We investigate the influence of anion-cation composition of an aqueous medium on the etching rate in an acid electrolyte and the resistance of the insulation of a filled oxide coating. We reveal the cations and anions of the aqueous medium that increase the etching rate of the coating and decrease its insulation resistance. We establish that Al3+ and Mg2+ cations and SiO 2-3 anions have a considerable effect on the quality of the filled coating. A high-quality coating is obtained if their concentrations in the aqueous medium are at most (mg/liter) 100 for Al3+, 700 for Mg2+, 800 for Cl−, and 13 for SiO 2-3 . The optimum pH of the environment is equal to 6 and the time of treatment of a coating in distilled water is equal to 60 ± 5 min.

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Authors
  1. V. T. Yavors'kyi
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  2. I. P. Mertsalo
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  3. M. D. Klapkiv
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  4. L. V. Savchuk
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  5. V. T. Olynets'
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Yavors'kyi, V.T., Mertsalo, I.P., Klapkiv, M.D. et al. Influence of Additions of Water on the Quality of Filled Anodic Oxide Coatings. Materials Science 39, 745–749 (2003). https://doi.org/10.1023/B:MASC.0000023516.93101.a8

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  • DOI: https://doi.org/10.1023/B:MASC.0000023516.93101.a8

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