In the present study, 2024 aluminum alloy specimen was anodized in acetic acid and oxalic acid e- lectrolytes. Effects of the current density on the microstructure and corrosion resistance of anodic oxide film have be...In the present study, 2024 aluminum alloy specimen was anodized in acetic acid and oxalic acid e- lectrolytes. Effects of the current density on the microstructure and corrosion resistance of anodic oxide film have been investigated. The steady voltage increases from 11 V to 71 V with the current density increase from 0. 5 A/din2 to 2. 5 A/din2. The SEM reveals that there are pits, cavities and irregular pores in the anodic film, and their size and morphologies change with the current density. The corrosion resistance of the film was evalua- ted by potentiodynamic polarization and electrochemical impedance in 0.1 mol/L FeC13 solution at room temper- ature. The results show that corrosion resistance of the anodic oxide film changes with the current density, and the anodic fihn formed at the current density of 1.0 A/dm2 has the best corrosion resistance. These observations indicate that anodic film formed at J -- 1.0 A/dm2can serve as a support material for the Cu micrometallic pat-展开更多
基金Sponsored by the National Natural Science Foundation of China (Grant No. 60971020)
文摘In the present study, 2024 aluminum alloy specimen was anodized in acetic acid and oxalic acid e- lectrolytes. Effects of the current density on the microstructure and corrosion resistance of anodic oxide film have been investigated. The steady voltage increases from 11 V to 71 V with the current density increase from 0. 5 A/din2 to 2. 5 A/din2. The SEM reveals that there are pits, cavities and irregular pores in the anodic film, and their size and morphologies change with the current density. The corrosion resistance of the film was evalua- ted by potentiodynamic polarization and electrochemical impedance in 0.1 mol/L FeC13 solution at room temper- ature. The results show that corrosion resistance of the anodic oxide film changes with the current density, and the anodic fihn formed at the current density of 1.0 A/dm2 has the best corrosion resistance. These observations indicate that anodic film formed at J -- 1.0 A/dm2can serve as a support material for the Cu micrometallic pat-
