MgとAlの再陽極酸化電流変化の比較(<小特集>M&P2009機械材料・材料加工部門技術講演会)

概要

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To find the anodizing condition of Mg that has film with high corrosion resistance, the current when the anodizing (60V×180s) and the immersion treatment (0V×60s) were repeated was measured. The initial current of re-anodizing of Mg in the NaOH solution was very high, and it was thought that the anodic oxide film was unstable. On the other hand, the initial current of re-anodizing in the Na_3PO_4 solution is low, and the tendency to the current change resembled the case of anodizing of Al in phosphoric acidic solution that formed the film with high corrosion resistance. Therefore, the anodic oxide film in Na_3PO_4 solution was expected to have corrosion resistance. And, it was thought that the measurement of the re-anodizing current is useful for the evaluation of the film property.
2010-06-25