Electrochemical properties of α-Fe + Fe3C nanocrystalline composites in acidic environments

被引：12
|
作者：
Syugaev, A. V. [1 ]
Lomaeva, S. F. [1 ]
Reshetnikov, S. M. [2 ]
机构：
[1] Russian Acad Sci, Ural Branch, Phys Tech Inst, Izhevsk 426000, Udmurtia, Russia
[2] Udmurt State Univ, Izhevsk 426034, Udmurtia, Russia
来源：
PROTECTION OF METALS AND PHYSICAL CHEMISTRY OF SURFACES | 2010年 / 46卷 / 01期
基金：
俄罗斯基础研究基金会;
关键词：
NANOCRYSTALLINE INGOT IRON; CORROSION BEHAVIOR; GRAIN-SIZE; POLYCRYSTALLINE; COATINGS; ALLOYS;
D O I：
10.1134/S2070205110010120
中图分类号：
TF [冶金工业];
学科分类号：
0806 ;
摘要：
Regularities of the physicochemical behavior of alpha-Fe + Fe3C nanocomposites in a concentration range of cementite from 9 to 92 wt % in sulfate and chloride solutions are studied. Nanocrystalline state (similar to 40 nm) is found to intensify the active dissolution of alpha-Fe + Fe3C alloys and not noticeably affect the hydrogen evolution in acidic environments. With an increase in the cementite content or when it forms a reticular structure, the catalytic activity of alpha-Fe + Fe3C nanocrystalline composites with respect to the hydrogen evolution increases. Cementite manifests a higher overpotential of dissolution in both sulfate and chloride solutions.
引用
收藏
页码：82 / 89
页数：8
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