Effect of roughness on general corrosion and pitting of (FeCoCrNi)0.89(WC)0.11 high-entropy alloy composite in 3.5 wt.% NaCl solution

被引：160

作者：

Wei, Liang ^{[1
]}

Liu, Yong ^{[2
]}

Li, Qian ^{[1
,3
,4
,5
]}

Cheng, Y. Frank ^{[1
,6
]}

机构：

[1] Shanghai Univ, Mat Genome Inst, Shanghai 200444, Peoples R China

[2] Cent S Univ, State Key Lab Powder Met, Changsha 410083, Hunan, Peoples R China

[3] State Key Lab Adv Special Steels, Shanghai 200444, Peoples R China

[4] Shanghai Key Lab Adv Ferromet, Shanghai 200444, Peoples R China

[5] Sch Mat Sci & Engn, Shanghai 200444, Peoples R China

[6] Univ Calgary, Dept Mech Engn, Calgary, AB T2N 1N4, Canada

来源：

CORROSION SCIENCE | 2019年 / 146卷

基金：

中国博士后科学基金; 中国国家自然科学基金;

关键词：

Metal matrix composites; Polarization; XPS; Passive films; Pitting corrosion; DUPLEX STAINLESS-STEEL; SURFACE-ROUGHNESS; MECHANICAL-PROPERTIES; WEAR BEHAVIOR; HIGH-STRENGTH; GRAIN-SIZE; RESISTANCE; MICROSTRUCTURE; TEMPERATURE; CHROMIUM;

D O I：

10.1016/j.corsci.2018.10.025

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The influence of roughness on general corrosion and pitting of (FeCoCrNi)(0.89)(WC)(0.11) high-entropy alloy composite in 3.5 wt.% NaCl solution was studied by electrochemical measurements and composition characterization. The results showed that a dual-layer passive film formed on WC-HEA composite, and its stability and compactness increased with the decreased roughness. The predominant corrosion type of the composite changed from general corrosion to pitting with the decrease of roughness. Galvanic corrosion occurred between the FCC phase (cathode) and Cr-rich carbide (anode) on the smooth composite surface, inducing the pitting initiation and development of the Cr-rich carbide at the two-phase interface.

引用

页码：44 / 57

页数：14

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