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Instantaneous Impedance of Aluminium in Anodic Polarization Status

Published online by Cambridge University Press:  22 February 2011

Zhu Yingyang ,
Wang Kuang ,
Zhu Rizhang  and
Zhang Wenqi
Zhu Yingyang
Affiliation:
Beijing University of Iron and Steel Technology, Beijing, China
Wang Kuang
Affiliation:
Beijing University of Iron and Steel Technology, Beijing, China
Zhu Rizhang
Affiliation:
Beijing University of Iron and Steel Technology, Beijing, China
Zhang Wenqi
Affiliation:
Beijing University of Iron and Steel Technology, Beijing, China
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Abstract

The instantaneous impedance of AL in 1N NaCl at various polarization tines has been measured using LapLace transformation method. In an instant of beginning polarization, the dependance of interfacial resistance, Rf, on polarization current, ip, follows:

Interfacial capacitance, Cf, however, indepenrs of ip, only depends on film's thickness. In the course of polarization, Rf changed hardly with time, Cfchanged greatly. This is due to little difference between the resistance on corroded region and the resistance on the region with film, and great difference capacitance on both regions. A reasonable model has beon pronosed to explain the experimental results.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 48: Symposium E – Applied Materials Characterization , 1985 , 91
Copyright
Copyright © Materials Research Society 1985

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References

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