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Factors influencing the growth behaviour of nanoporous anodic films on iron under galvanostatic anodizing

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Title: Factors influencing the growth behaviour of nanoporous anodic films on iron under galvanostatic anodizing
Authors: Konno, Y. Browse this author
Tsuji, E. Browse this author
Skeldon, P. Browse this author
Thompson, G. E. Browse this author
Habazaki, H. Browse this author →KAKEN DB
Keywords: Iron
Anodizing
Porous anodic film
Organic electrolyte
Issue Date: Dec-2012
Publisher: Springer-Verlag
Journal Title: Journal of Solid State Electrochemistry
Volume: 16
Issue: 12
Start Page: 3887
End Page: 3896
Publisher DOI: 10.1007/s10008-012-1833-1
Abstract: The growth behaviour of nanoporous anodic films on iron during galvanostatic anodizing in ethylene glycol electrolytes containing NH4F and H2O is examined at various current densities, H2O concentrations in electrolytes and temperatures. The film morphology is mainly controlled by the formation voltage, regardless of anodizing conditions. Relatively regular cylindrical pores are formed at formation voltages less than 50 V, while rather disordered pores are formed above 100 V. The decrease in the H2O concentration suppresses chemical dissolution of anodic films in addition to the increased growth efficiency, resulting in the formation of anodic films with a steady thickness of ~7 μm. The cell size of the anodic films depends upon the H2O concentration as well as the formation voltage, but not upon the current density. Findings in this study will be useful for controlled growth of the anodic films on iron.
Rights: The final publication is available at www.springerlink.com
Type: article (author version)
URI: http://hdl.handle.net/2115/51072
Appears in Collections:工学院・工学研究院 (Graduate School of Engineering / Faculty of Engineering) > 雑誌発表論文等 (Peer-reviewed Journal Articles, etc)

Submitter: 幅崎 浩樹

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