SEMICONDUCTING PROPERTIES OF PASSIVE FILMS ON AISI-304 AND AISI-316 STAINLESS-STEELS

被引：58

作者：

BABIC, R

METIKOSHUKOVIC, M

机构：

[1] Institute of Electrochemistry, Faculty of Chemical Engineering and Technology, University of Zagreb, 41000 Zagreb

来源：

JOURNAL OF ELECTROANALYTICAL CHEMISTRY | 1993年 / 358卷 / 1-2期

关键词：

D O I：

10.1016/0022-0728(93)80435-K

中图分类号：

O65 [分析化学];

学科分类号：

070302 ; 081704 ;

摘要：

Passive films on AISI 304 and 316 stainless steels in a near-neutral 0.5 M NaCl solution were studied using potentiodynamic, impedance and photoelectrochemical techniques. The results obtained indicate that passive films on both steels show the characteristics of an amorphous or disordered n-type semiconductor. The passive film on molybdenum-containing stainless steel has a lower donor concentration than that on 304 stainless steel. During the ageing process the donor concentration in passive films on both steels decreases. The shift of the Mott-Schottky line with pH change and consequently the pH dependence of the flat-band potential is assumed to be caused by an acid-base equilibrium established at the passive film/solution interface. Potential dependence of the optical gap value is observed and is interpreted on the basis of the passive film composition.

引用

页码：143 / 160

页数：18

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