ON THE PASSIVATION CHARACTERISTICS OF A BETA-FEAL INTERMETALLIC COMPOUND IN SULFATE-SOLUTIONS

被引：38

作者：

FRANGINI, S ^{[1
]}

DECRISTOFARO, N ^{[1
]}

LASCOVICH, J ^{[1
]}

MIGNONE, A ^{[1
]}

机构：

[1] INTI,RA-1650 SAN MARTIN,ARGENTINA

来源：

CORROSION SCIENCE | 1993年 / 35卷 / 1-4期

关键词：

D O I：

10.1016/0010-938X(93)90145-7

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The corrosion and passivation behaviour of Fe-24 wt% Al intermetallic Compound has been studied in sulphate solutions using cyclic voltammetry and potentiodynamic curves, combined with X-rav photoelectron spectroscopy (XPS). The voltammogramms performed in 0.5 M H2SO4 show the peaks characteristic of the oxidation/reduction process of iron. The comparison of the anodic polarization curve of FeAl in acid solution with those of the pure elements shows the beneficial effect of Al when added to Fe in terms of both passive range and current density. At higher pH (6.0 and 13.6), the FeAl passivates spontaneously. Preliminary XPS studies of the passive films grown in air and anodically revealed coexistence of iron and aluminium oxides, thus explaining the superior corrosion resistance of iron aluminides compared to iron.

引用

页码：153 / 159

页数：7

共 12 条

[1]

[Anonymous], 1966, ATLAS ELECTROCHEMICA

[2] XPS DETERMINATION OF COMPOSITIONS OF ALLOY SURFACES AND SURFACE OXIDES ON MECHANICALLY POLISHED IRON-CHROMIUM ALLOYS [J].