Electrochemical characteristics of nano and microcrystalline Fe–Cr alloys

被引：0
作者：
Rajeev K. Gupta
R. K. Singh Raman
C. C. Koch
机构：
[1] Monash University,Department of Materials Engineering
[2] Monash University,Department of Mechanical and Aerospace Engineering
[3] Monash University,Department of Chemical Engineering
[4] North Carolina State University,Department of Materials Science and Engineering
来源：
Journal of Materials Science | 2012年 / 47卷
关键词：
Passive Film; Passive Current Density; Surface Mechanical Attrition Treatment; Potentiodynamic Polarization Test; Corrosion Film;
D O I：
暂无
中图分类号：
学科分类号：
摘要：
The electrochemical behavior of nano and microcrystalline Fe–10Cr and Fe–20Cr alloys was determined using potentiodynamic polarization in 0.5 M H2SO4. Disks of the alloys were prepared by high-energy ball milling followed by compaction and sintering. In the current study, nanocrystalline Fe–Cr alloys reveal significantly different electrochemical characteristics, typified by lower anodic current densities and more negative passivation potentials, compared with their microcrystalline counterparts. In addition to the differences in grain boundary density, compositional characterization of corrosion films carried out by X-ray photoelectron spectroscopy indicates a higher Cr content in the film developed upon nanocrystalline Fe–Cr alloys. Mechanisms for observed enhancement in the corrosion performance of the nanocrystalline Fe–Cr alloys are discussed.
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页码：6118 / 6124
页数：6
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