XPS ANALYSIS OF PASSIVE FILMS ON THE AMORPHOUS ALLOY FE70CR10P13C7 - EFFECT OF THE APPLIED POTENTIAL

被引：56

作者：

ROSSI, A ^{[1
]}

ELSENER, B ^{[1
]}

机构：

[1] SWISS FED INST TECHNOL,INST MAT CHEM & CORROS,CH-8093 ZURICH,SWITZERLAND

来源：

SURFACE AND INTERFACE ANALYSIS | 1992年 / 18卷 / 07期

关键词：

D O I：

10.1002/sia.740180708

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Passive films formed in 1N HCl at different potentials on mechanically polished samples of the alloy Fe70Cr10P13C7 were studied by XPS surface analysis. The thickness of the films increases with the applied potential; at 0.4 V/SCE (saturated calomel electrode) a discontinuity is observed. The passive films are enriched in chromium oxyhydroxide; phosphates are incorporated in notable amounts. The substrate underneath the film is enriched in phosphorus The outstanding corrosion resistance of this alloy may thus be attributed to this enrichment of phosphorus underneath the film, reducing to a great extent the ionic conductivity of the interface, and to the incorporation of phosphates in the passive film.

引用

页码：499 / 504

页数：6

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