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Electrochemical impedance spectroscopy analysis on aluminum alloys in EXCO solution

✍ Scribed by F.-H. Cao; Z. Zhang; J.-X. Su; J.-Q. Zhang

Publisher: John Wiley and Sons
Year: 2005
Tongue: German
Weight: 212 KB
Volume: 56
Category: Article
ISSN: 0947-5117
DOI: 10.1002/maco.200403844

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✦ Synopsis

Abstract

Electrochemical impedance spectroscopy (EIS) of Al‐Zn‐Mg‐Cu alloy in EXCO solution has been investigated. The results show that the impedance spectroscopy of the investigated electrode consists of two capacitive loops in the high and middle frequency domain respectively and an inductive loop in the low frequency domain at the first 30 h of immersion; the inductive arc disappears between 30 h and 60 h while it takes on at the low frequency domain at the last 36 h of the immersion time. A model based on the corrosion mechanism of the aluminum alloy and corroding morphology was proposed and applied to analyze the EIS results.

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