Fe-Mn-Si合金在H_2SO_4溶液中的耐蚀性  

Corrosion Resistance of Fe-Mn-Si Alloys in H_2SO_4 Solution

作　　者：田如锦[1] 

机构地区：[1]大连交通大学材料科学与工程学院,辽宁大连116028

出　　处：《大连交通大学学报》2011年第1期61-64,共4页Journal of Dalian Jiaotong University

摘　　要：通过电化学测量方法研究Fe-Mn-Si合金在H2SO4水溶液中的腐蚀行为.结果表明,Fe-Mn-Si合金在打磨过程中发生了应变诱发ε-马氏体转变,其表层结构为奥氏体和ε-马氏体.Fe-Mn合金的自腐蚀电流密度比Fe-Mn-Si合金低1个数量级.Fe-Mn-Si合金在0.1M H2SO4溶液中的腐蚀速度较快,这是因为ε-马氏体和奥氏体相间的电极电位不同,表面发生全面腐蚀.Electrochemical properties of Fe-Mn-Si alloys are investigated in 0.1 M H2SO4 solution by electrochemical characterization technique.Experiment results show that strain-induced γ→ε-martensite transformation occurs during surface grounding.The surface microstructure of the Fe-Mn-Si alloys is composed of austenite and ε-martensite.Corrosion rate Icorr of the Fe-Mn alloy is one mangnitude lower than those of the Fe-Mn-Si alloys,which results from the electrode potential difference between austenite and ε-martensite in the Fe-Mn-Si alloys and the general corrosion on the alloy surface.

关 键 词：FE-MN-SI合金 腐蚀 极化 应变诱发ε-马氏体 

分 类 号：TG172[金属学及工艺—金属表面处理]