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http://dx.doi.org/10.14773/cst.2011.10.1.037

Effect of Ultrasound During Pretreatment on the Electrochemical Etching of Aluminum and Its Capacitance  

Jung, Insoo (Department of Chemical Engineering, Inha University)
Tak, Yongsug (Department of Chemical Engineering, Inha University)
Park, Kangyong (Samyoung Electronics Company)
Kim, Hyungi (Samyoung Electronics Company)
Kim, Sungsoo (Samyoung Electronics Company)
Publication Information
Corrosion Science and Technology / v.10, no.1, 2011 , pp. 37-42 More about this Journal
Abstract
Aluminum was electrochemically etched in acid solution and the surface area was magnified by the formation of etch pits. Etched aluminum was covered with a compact and dense dielectric oxide film by anodization and applied to the aluminum electrolytic capacitor electrode. Capacitance of aluminum electrolytic capacitor is closely related with surface area, which depends on size and number of etch pits. Size of etch pits need to be controlled because inside of the pits can be buried by the formation of dielectric oxide film. In this work, the effect of ultrasound pretreatment on the aluminum etch pit formation and capacitance were investigated. Additionally, the relationship between the second etching effect on pit size and capacitance was studied.
Keywords
Aluminum; electrochemical etching; ultrasound; anodization;
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