Electrochemical corrosion behaviour of (100), (110) and (111) Fe3Al single crystals in sulphuric acid

被引：23

作者：

Brito, Pedro ^{[1
]}

Schuller, Erica ^{[1
]}

Silva, Josafa ^{[1
]}

Campos, Thais Roberta ^{[1
]}

de Araujo, Carlos Roberto ^{[1
]}

Carneiro, Jose Rubens ^{[1
]}

机构：

[1] Pontificia Univ Catolica Minas Gerais, Dept Engn Mecan, Av Dom Jose Gaspar 500, BR-30545901 Belo Horizonte, MG, Brazil

来源：

CORROSION SCIENCE | 2017年 / 126卷

关键词：

Corrosion; Iron aluminides; EIS; Potentiodynamic polarization; Crystallographic orientation; IRON ALUMINIDE; ANODIC-DISSOLUTION; AQUEOUS CORROSION; IMPEDANCE; INTERMETALLICS; PERFORMANCE; OXIDATION; ADDITIONS; TEXTURE; SURFACE;

D O I：

10.1016/j.corsci.2017.05.029

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

In the present work the electrochemical corrosion behaviour of iron aluminide single crystals from a binary Fe3Al alloy in 0.5 M H2SO4 containing naturally dissolved O-2 was investigated. The single crystal samples used in the experiments had surface orientations parallel to the low-index planes (100), (110) and (111) and were analysed by potentiodynamic polarization as well as electrochemical impedance spectroscopy. The results obtained showed that corrosion rates followed the trend (100) < (110) approximate to (111). Examination of the corroded surfaces revealed the presence of distinct patterns on each single crystal which indicated that the dissolution process was influenced by surface crystallography.

引用

页码：366 / 373

页数：8

共 33 条

[1] Effect of alloying on aqueous corrosion and mechanical behaviour of iron aluminide Fe3Al [J].