Study of Dual Films on Al Anodized in a Sulfuric Acid Bath with DC and AC Containing Electrodeposited Sn in Pores

We studied the microstructure, chemical, and optical properties of dual films formed on Al anodized in a sulfuric acid bath, first by DC, then by AC in the same bath, and then deposited Sn electrolytically intomicropores. AC films grew beneath DC films forming twig-like micropores of 3-5nm diameter,...

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Bibliographic Details
Published inHyōmen gijutsu Vol. 49; no. 9; p. 1016
Main Authors KAWAI, Satoshi, YAMAMURO, Masaaki, WADA, Kenji
Format Journal Article
LanguageEnglish
Published Tokyo Japan Science and Technology Agency 01.09.1998
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Summary:We studied the microstructure, chemical, and optical properties of dual films formed on Al anodized in a sulfuric acid bath, first by DC, then by AC in the same bath, and then deposited Sn electrolytically intomicropores. AC films grew beneath DC films forming twig-like micropores of 3-5nm diameter, 5-7nm cell·size, and 30-35nm barrier layer thickness. Metallic Sn precipitated densely into pores of AC films, and showed optical interference colors of blue, green, and gold with increasing Sn layer thickness. Corrosion and light fastness tests disclosed fairly good results, and alkali dropping tests showed eminent properties due to thick barrier layers.
ISSN:0915-1869
1884-3409