INFLUENCE OF TEMPERATURE ON THE PROPERTIES OF PASSIVE FILMS FORMED ON AISI 304 STAINLESS-STEEL

被引：58

作者：

SIMOES, AMP

FERREIRA, MGS

LORANG, G

BELO, MD

机构：

[1] Univ Tecn Lisboa, DEPT ENG QUIMAV ROVISCO PAIS, ELECTROQUIM LAB, INST SUPER TECN, P-1096 LISBON, PORTUGAL

[2] CNRS, CTR ETUD CHIM MET, F-94407 VITRY, FRANCE

来源：

ELECTROCHIMICA ACTA | 1991年 / 36卷 / 02期

关键词：

D O I：

10.1016/0013-4686(91)85255-6

中图分类号：

O646 [电化学、电解、磁化学];

学科分类号：

081704 ;

摘要：

The nature of the passive film formed on the surface of AISI 304 stainless steel in a borate-boric acid medium (pH approximately 9.0), at temperatures between 8-degrees-C and 70-degrees-C has been investigated, by means of photoelectrochemistry, electrochemical impedance and Auger analysis. An apparent activation energy has been determined for the passive current. Values of bandgap, flatband potential and space charge thickness have been obtained. An Arrhenius type of relationship was detected between the density of charge carriers and T, leading to an activation energy of 0.1 eV, which was associated with the ionization energy of the donor species. This characterization of the film is completed by a quantitative determination of its chemical composition and thickness which were derived from Auger depth profile analysis.

引用

页码：315 / 320

页数：6

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