Electrochemical Impedance Characterization of Porous Aluminum Oxide after Different Stages of Two-Step Anodization

Abstract:

In this paper, porous anodic aluminum oxide (AAO) membrane was prepared with highly pure aluminum film in 0.3M oxalic acid under dc voltage of 40V at about 8°C by two-step anodization. The morphology of the specimens processed in different stages of two-step anodization was observed with a scanning electron microscope (SEM). The electrochemical behavior of the anodized aluminum after different stages of two-step anodization was studied by electrochemical impedance spectroscopy (EIS). Different equivalent circuits were established to fit EIS experiment data, based on morphologies and structures of AAO during processing. The electrical elements in the equivalent circuits were used to explain experimental parameters.

• Periodical: Advanced Materials Research (Volumes 953-954)
• Pages: 1282-1285
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.953-954.1282
• Online since: June 2014
• Authors: Jing Zhe Wang, Chun Hua Xu, Wei Cao, Yan He
• Keywords: Anodization, Electrochemical Impedance Spectroscopy, Equivalent Circuit, Porous Anodic Aluminum Oxide Membrane

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