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http://dx.doi.org/10.5695/JKISE.2019.52.4.203

Formation Characteristics of Hard Anodizing Films on 6xxx Aluminum Alloys  

Moon, Sanghyuck (Material Process Engineering, Gyeongsang National University)
Moon, Sungmo (Surface Technology Division, Korea Institute of Materials Science)
Lim, Sugun (Material Process Engineering, Gyeongsang National University)
Publication Information
Journal of the Korean institute of surface engineering / v.52, no.4, 2019 , pp. 203-210 More about this Journal
Abstract
In this work, anodizing behavior of 6xxx series aluminum alloys was studied under constant current density and constant voltage conditions in 20% sulfuric acid solution by V-t curves, I-t curves, thickness measurement, observations of surface appearance and cross-sectional observation of anodizing films. The film growth rate of the anodizing films on Al6063, Al6061 and Al6082 obtained at 20 V were $0.63{\mu}m/min$. $0.46{\mu}m/min$ and $0.38{\mu}m/min$, respectively. Time to the initiation of imperfections at the oxide/substrate interface under constant current condition was shortened and colors of anodizing films became darker with the amount of alloying elements in 6xxx series aluminum alloys. Based upon the experimental results obtained in this work, it is concluded that maximum anodizing film thickness without interfacial defects is reduced with increasing amount of alloying elements and brighter anodizing films can be obtained by decreasing amount of alloying elements in the aluminum alloys.
Keywords
Hard Anodizing; Anodic Oxide Film; Aluminum Alloys; Sulfuric Acid Anodizing;
Citations & Related Records
Times Cited By KSCI : 3  (Citation Analysis)
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