Atom-Probe Micro-Characterization of Local Compositional Fluctuations and Passivated Surfaces of Stainless Steel

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  • ステンレス鋼の極微小領域における組成ゆらぎと不動態皮膜のアトムプローブによる検討
  • ステンレス コウ ノ キョク ビショウ リョウイキ ニ オケル ソセイ ユラギ

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Description

The atom-probe was used to examine the local compositional fluctuation and the Passivated surface of type 316 stainless steel. The analysis of the field evaporated clean surface shows the presence of compositional fluctuation in a few nanometer size region. Immersion of the clean surfaces in nitric acid results in the formation of passive film which is at most 4 monolayers thick and consists mainly of Cr-compounds. The alloying elements, Cr and Ni, are enriched in the film, while Mo is enriched at the film-metal interface. Furthermore it should be noted that variations in thickness and composition of the passive film are shown in a few nanometer size region. This may be resulted from the compositional fluctuation in the stainless steel.

Journal

  • CORROSION ENGINEERING

    CORROSION ENGINEERING 39 (5), 232-237, 1990

    Japan Society of Corrosion Engineering

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