The initial growth of a porous alumina film with a large-scale cell structure formed by galvanostatic anodizing in etidronic acid was investigated in detail by high-resolution microscopy. High-purity aluminum plates were galvanostatically anodized in etidronic acid at 2.5–20.0 Am −2 . The formation of an anodic oxide and the subsequent instability of the outer oxide simultaneously occurred at the early stage of the linear voltage increase during the anodizing process. Accordingly, a wavy interface boundary between the aluminum oxide that contained incorporated anions and the nearly pure aluminum oxide formed in the anodic oxide. The surviving pores grew as the thickness of the oxide film increased, and a clear porous alumina film with a pore at the center of each cell formed until the voltage reached its maximum value. Finally, steady-state growth of the porous alumina film occurred at the plateau voltage region after a slight voltage decrease. Eggplant-like anion distr...

中文翻译：

---

高分辨率显微镜观察多孔氧化铝膜的初始结构变化

通过高分辨率电子显微镜详细研究了通过在依替膦酸中进行恒电流化阳极氧化形成的具有大孔结构的多孔氧化铝膜的初始生长。高纯铝板在乙二酸中2.5–20.0 Am -2进行恒电流阳极化处理。阳极氧化过程中，线性电压升高的早期阶段同时发生了阳极氧化物的形成和随后外部氧化物的不稳定性。因此，在包含结合的阴离子的氧化铝与在阳极氧化物中形成的近乎纯净的氧化铝之间的波状界面边界。残存的细孔随着氧化膜的厚度的增加而生长，形成透明的多孔氧化铝膜，在每个单元的中央具有细孔，直至电压达到最大值。最后，电压略有下降后，在平台电压区域出现了多孔氧化铝膜的稳态生长。茄子状负离子...