Effect of frequency and current density on AC etching of aluminum electrolytic capacitor foil
Journal
Journal of Materials Science-Materials in Electronics
Journal Volume
18
Journal Issue
6
Pages
627-634
Date Issued
2007
Author(s)
Abstract
This work studies the effects of current frequency and current density on etching morphology, microstructure and static capacity of the aluminum foils used in electrolytic capacitors. The behavior associated with electrochemical etching during an anodic half cycle was investigated by a potentiostat. The oxide covering of the anode, which protected aluminum from etching, thickened as the frequency increased. Increasing the current density inhibit the passing of chlorine ions through the passive cover. The static capacity increased to 70μF/ cm 2 with 20 V forming voltage by optimization the etching parameters used herein this work. © Springer Science+Business Media, LLC 2006.
Publisher
journal article
Type
journal article