Corrosion resistance mechanism of the passive films formed on as-cast FeCoCrNiMn high-entropy alloy

被引：12
作者：
Lv, Jinlong [1 ]
Jin, Huijin [2 ]
机构：
[1] Tsinghua Univ, Inst Nucl & New Energy Technol, Zhongguancun St, Beijing 100084, Peoples R China
[2] Chinese Acad Sci, Inst Mech, State Key Lab Nonlinear Mech, Beijing 100190, Peoples R China
来源：
MATERIALS RESEARCH EXPRESS | 2020年 / 7卷 / 01期
基金：
中国国家自然科学基金;
关键词：
high-entropy alloy; homogenization; electrochemistry; passive films; point defect model; GRAIN-REFINEMENT; BEHAVIOR; MICROSTRUCTURE; DEFORMATION; SURFACE; MODEL;
D O I：
10.1088/2053-1591/ab6c92
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
The present work investigates the corrosion resistance of as-cast FeCoCrNiMn high-entropy alloy in borate buffer solution. Compared with 304 and 316L stainless steels steel, as-cast FeCoCrNiMn high-entropy alloy exhibited excellent passivation ability. This should be attributed to homogenization of alloying elements. Highly corrosion-resistant elements in as-cast FeCoCrNiMn alloys, for example, Cr, Co and Ni, could promote the formation of protective passive film in borate buffer solution. Moreover, combined effect of high mixing entropy and sluggish diffusion also could improve the corrosion resistance. The formation mechanism of the passive films on the surface of as-cast FeCoCrNiMn alloys satisfied the point defect model.
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页数：5
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