Anodic oxide formation on AA2624: electrochemical and microstructure investigation

M. Schneider; O. Yezerska; M. M. Lohrengel

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Anodic oxide formation on AA2624: electrochemical and microstructure investigation

机译：在AA2624上形成阳极氧化物：电化学和微观结构研究

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The microstructure of AA2024 T351 was characterised by light and scanning electron microscopy combined with energy dispersive X-ray spectrometry. Mainly three types of intermetallics (0 phase, S phase and an Al-Fe-Si-Mn-Cu phase) were identified. The anodic oxide formation on AA2024 was studied by electrochemical measurements between 0 and 10 V{sub}(SCE) in sulphuric and citric acid based electrolytes. The cyclic voltammetry clearly showed the influence of the intermetallics during anodisation. Oxygen evolution took place on the intermetallics at simultaneously anodic dissolution of themselves. Furthermore, the influence of the electrolytes on the oxide layer structure was shown by TEM cross-sections. Oxide layers formed in sulphuric acid (pH 0) show the common disordered pore structure. Oxide layers formed in citric acid (pH 1) are completely free of pores.

机译：通过光和扫描电子显微镜结合能量色散X射线光谱法表征了AA2024 T351的显微结构。主要鉴定了三种金属间化合物（0相，S相和Al-Fe-Si-Mn-Cu相）。通过在硫酸和柠檬酸基电解质中在0和10 V {sub}（SCE）之间进行电化学测量，研究了AA2024上的阳极氧化物形成。循环伏安法清楚地表明了阳极氧化过程中金属间化合物的影响。氧在金属间化合物上同时发生阳极溶解而析出。此外，通过TEM截面显示了电解质对氧化物层结构的影响。在硫酸（pH 0）中形成的氧化物层显示出常见的无序孔结构。柠檬酸（pH 1）中形成的氧化物层完全没有孔。

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《Corrosion Engineering, Science and Technology》 |2008年第4期|共9页
作者
M. Schneider; O. Yezerska; M. M. Lohrengel;
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正文语种 eng
中图分类金属腐蚀与保护、金属表面处理;
关键词
Anodisation; AA2024; Microstructure; Electrochemistry;

机译：阳极氧化;AA2024;微观结构;电化学;

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Anodic oxide formation on AA2624: electrochemical and microstructure investigation

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