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Bulletin of the Korean Chemical Society (BKCS)

ISSN 0253-2964(Print)
ISSN 1229-5949(Online)
Volume 21, Number 2
BKCSDE 21(2)
February 20, 2000

Title	The Electrochemical Behaviors of Barrier-Type Anodic Films on Aluminum in Ammonium Adipate Solution
Author	Han-Jun Oh, Choong-Soo Chi
Keywords
Abstract	To investigate the effect of applied voltage and anodizing time on the formation and characteristics of barriertype oxide layer, aluminum was anodized in 150 g/L ammonium adipate solution at 65 ℃. The electrochemical behavior of oxide layers on aluminum was studied using impedance spectroscopy. The fitted results of impedance spectroscopy show clearly that the thickness of the oxide film subjected to applied anodic voltage increased linearly at a ratio of 1.42 nm/V, but the effect of the anodizing duration at constant voltage on film thickness was not remarkable. From a comparison of the fitting results and the observed microstructure using TEM, the fitted capacity by equivalent circuit can be directly converted to an oxide thickness.
Page	193 - 199
Full Text	PDF

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