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Semiconducting properties of passive films on stainless steels

✍ Scribed by Agatino Di Paola

Publisher
Elsevier Science
Year
1989
Tongue
English
Weight
823 KB
Volume
34
Category
Article
ISSN
0013-4686

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✦ Synopsis

The semiconducting properties of passive films grown on three different stainless steels have been investigated by measuring the potential dependence of the capacitance at various frequencies and in different solutions. The results of the capacitance response indicate that the passive films behave like highly doped n-type semiconductors. A strong frequency dispersion hampers the determination of the exact value of the flat band potential of the films from the Mot&Schottky plots. Donor concentrations in the range 102"-1021 crne3 have been obtained at 1 kHz. The intersection potentials at l/C?=0 show a linear dependence on the pH.

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Identification of Mo(V) commonly observe
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There has been a longstanding debate and controversy in the literature with regard to the determination by XPS of the exact oxidation state of a molybdenum species commonly observed in the passive Ðlms of stainless steel. In this paper we have compared both the XPS and ESR analyses of molybdenum oxy