不働態皮膜の局部的破壊と孔食-動力学的過程

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タイトル別名
  • Breakdown of Passivity and Pitting Corrosion-Kinetic Processes
  • フドウタイ ヒマク ノ キョクブテキ ハカイ ト コウショク ドウリキガクテキ

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抄録

Theories of passive film destruction and pitting corrosion are reviewed with a prospect for the future development of kinetic theories concerning pitting phenomena. The structure and chemical composition, the electrical and mechanical properties of passive films are reviewed briefly, to provide the knowledge of structural change as a precursor of pitting. Also the specific nature of pitting corrosion known experimentally, such as pitting potential, critical concentration of aggressive ions, the induction time, pit localization and a stochastic aspect of pit initiation, is noted. The existing models which have been proposed for the action of aggressive anions in the course of pit initiation are compared and some of promising models are considered in connection with the relevant kinetic theories of pitting corrosion. Future development of atomistic models are recommended since pitting as a kinetic process needs clarification from microscopic point of view.

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