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

Autor:	Yavors'kyi, V. T., Mertsalo, I. P., Klapkiv, M. D., Savchuk, L. V., Olynets', V. T.
Předmět:	OXIDE coating ANODIC oxidation of metals ANIONS CATIONS SURFACE coatings MATERIALS
Zdroj:	Materials Science; Sep/Oct2003, Vol. 39 Issue 5, p745-749, 5p
Abstrakt:	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 $\{\backslash rm\; SiO\}\_3^\{2-\}$ 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 $\{\backslash rm\; SiO\}\_3^\{2-\}$. 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. [ABSTRACT FROM AUTHOR]
Databáze:	Complementary Index
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