Erosion-Corrosion Property of CeO2-Modified HVOF WC-Co Coating

被引：29
|
作者：
Liu, Yan [1 ]
Hang, Zongqiu [1 ]
Chen, Hui [1 ]
Ceng, Shengbo [1 ]
Gou, Guoqing [1 ]
Wang, Xiaomin [1 ]
Tu, Mingjing [2 ]
Wu, Xiangyang [3 ]
机构：
[1] Southwest Jiaotong Univ, Sch Mat Sci & Engn, Chengdu 610031, Peoples R China
[2] Sichuan Univ, Sch Mat Sci & Engn, Chengdu 610064, Peoples R China
[3] CSR SIFANG Co Ltd, Qingdao 26611, Peoples R China
来源：
JOURNAL OF THERMAL SPRAY TECHNOLOGY | 2016年 / 25卷 / 04期
基金：
中国国家自然科学基金;
关键词：
erosion-corrosion; HVOF; rare earth; WC-Co coating; MICROSTRUCTURE;
D O I：
10.1007/s11666-016-0391-y
中图分类号：
TB3 [工程材料学];
学科分类号：
0805 ; 080502 ;
摘要：
Rare-earth elements have been widely used in materials manufacturing to improve hardness and toughness. In this work, conventional, nanostructured, and CeO2-modified WC-12Co powders were sprayed using high-velocity oxygen flame spraying. The erosion-corrosion behavior and interaction of erosion and corrosion of the coatings in 3.5 wt.% NaCl solution were investigated. In situ observation was employed to analyze the failure mechanism. The results showed that the CeO2-modified WC-12Co coating possessed the best erosion-corrosion resistance, while the lowest corrosion resistance was exhibited by the conventional WC-12Co coating. The results also suggested that the erosion-corrosion mechanism in the three coatings was dominated by corrosion-accelerated erosion. However, the extent of acceleration of erosion by corrosion differed.
引用
收藏
页码：815 / 822
页数：8
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