アルカリ溶液中の銅のアノード挙動 (第1報)

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タイトル別名
  • Anodic Behaviour of Copper in Alkaline Solution (Part 1)
  • エリプソメトリーおよび回転電極法による不働態被膜生成機構について
  • On the Mechanism of Passive Film Formation as Revealed by Ellipsometry and Rotating Disk Electrode Methods

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説明

The anodic behaviour of copper has been studied in alkaline solution using a rotating disk electrode and an ellipsometer. Anodic peak currents corresponding to Cu2O and Cu(OH)2-CUO formation during potential sweep were measured at various rotating speeds of Cu electrode. The peak current values showed a linear relationship to square-root of the rotating speed, indicating that the formation of Cu2O and Cu(OH)2-CuO films is controlled by the diffusion process of some species in the solution. A conventional method to prepare the copper substrate was proposed, and the refractive index of copper substrate was estimated to be 1.11-2.42i, which is in good agreement with that reported by other investigators. The refractive index of Cu2O film, formed anodically, was 1.90-0.30i. This film appears to have a loose structure compared with crystalline cuprous oxide. The surface of copper substrate was roughened by anodic oxidation-cathodic reduction treatments.

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