本文
No.8（2005）6.Influence of Electropolishing Conditions on the Occurrence of Irregular Patterns on the Surface of Anodized Aluminum
Tomonori SASAKI and Masakatsu MUSHIRO
In the process of anodizing aluminum in a sulfuric acid solution after electropolishing, an irregular pattern occurs on the surface of the anodized film, caused by the removal of the thin oxide film formed through the electropolishing. In order to investigate the cause of the generation of the irregular pattern, aluminum specimens were electropolished in a phosphoric acid bath on the condition of various temperatures and voltages.
It was found that the occurrence of an irregular pattern is determined by the relative thickness existing between dE, i.e., the thickness of the barrier layer depending on the condition of electropolishing, and dA, i.e., the thickness of the barrier layer depending on anodizing voltage. A description of the mechanism of the occurrence of the irregular pattern is provied.
Keywords
Aluminum, electropolishing, anodizing, irregular pattern, surface
