Abstract
This study is intended to present an efficient methodology for optimizing the anodic polarization process of 6xxx aluminum alloy to have high hardness. Additional electrochemical experiments have been conducted to observe the corrosion behavior of these oxide films. L9orthogonal array with four factors at three levelsareused. The type of additive, electrolyte temperature, current density and dissolved aluminum ions are chosen as parameters. The results show that the main parameters to increase the hardness of the oxide films are electrolyte temperature, additive type, dissolved aluminum ions and current density, respectively.
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