Analysis on the key role in corrosion behavior of CoCrNiAlTi-based high entropy alloy

doi:10.1016/j.matchemphys.2020.124007

IMR OpenIR

	Analysis on the key role in corrosion behavior of CoCrNiAlTi-based high entropy alloy
	Huang, Lei 1; Wang, Xuejie 2; Zhao, Xingchuan 1; Wang, Changzheng 1; Yang, Yuansheng 3
通讯作者	Wang, Changzheng(wangchangzheng@lcu.edu.cn)
	2021-02-01
发表期刊	MATERIALS CHEMISTRY AND PHYSICS
ISSN	0254-0584
卷号	259 页码:9
摘要	In this study, CoCr2Ni2AlTi, Co2Cr2Ni2AlTi and CoCr2Ni3AlTi alloys are prepared using vacuum arc melting furnace. The morphology, microstructure, compositions and corrosion behavior in 3.5 wt% NaCl solution or 0.5 M H2SO4 solution are investigated by means of scanning electron microscope (SEM), X-ray diffraction (XRD), energy dispersive spectrometer (EDS) and electro-chemical workstation, respectively. The results show that all high entropy alloys (HEAs) display analogous petal-like equi-axed dendrite and the dendrite arms are thin-like strip. The BCC1 phase is mainly rich in Al-Ni-Ti elements, the BCC2 is rich in Cr element and the FCC phase is composed of Co-Ti elements. Besides, the high contents of Co can promote distribution of Cr into inter-dendrite and can promote the formation of the nano-particles. In addition, all HEAs have better corrosion resistance than 304 stainless steel or other corrosion resistant HEAs and Co2Cr2Ni2AlTi has the best corrosion resistance in three HEAs under NaCl solution or H2SO4 solution. Cr element can form the passivation film Cr2O3, which has an important role in improving corrosion resistance. Co element can increase the stability of the passivation film and attenuates the hydrolysis of Cr3+. Ni element cannot increase the stability of the passivation film and promote the hydrolysis of Cr3+ in H2SO4 solution.
关键词	High entropy alloys Corrosion behavior Microstructure Chemical composition
资助者	Nature Science Foundation of Shandong Province
DOI	10.1016/j.matchemphys.2020.124007
收录类别	SCI
语种	英语
资助项目	Nature Science Foundation of Shandong Province[ZR2018MEM005.D: \MYFILES\ELSEVIER\MAC\00124007\SCE\gs1]
WOS研究方向	Materials Science
WOS类目	Materials Science, Multidisciplinary
WOS记录号	WOS:000615731100001
出版者	ELSEVIER SCIENCE SA
引用统计	被引频次：46[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://ir.imr.ac.cn/handle/321006/160445
专题	中国科学院金属研究所
通讯作者	Wang, Changzheng
作者单位	1.Liaocheng Univ, Sch Mat Sci & Engn, Liaocheng 252000, Shandong, Peoples R China 2.Qingdao Univ, Sch Mat Sci & Engn, Qingdao 266071, Shandong, Peoples R China 3.Chinese Acad Sci, Inst Met Res, Shenyang 110016, Liaoning, Peoples R China
推荐引用方式 GB/T 7714	Huang, Lei,Wang, Xuejie,Zhao, Xingchuan,et al. Analysis on the key role in corrosion behavior of CoCrNiAlTi-based high entropy alloy[J]. MATERIALS CHEMISTRY AND PHYSICS,2021,259:9.
APA	Huang, Lei,Wang, Xuejie,Zhao, Xingchuan,Wang, Changzheng,&Yang, Yuansheng.(2021).Analysis on the key role in corrosion behavior of CoCrNiAlTi-based high entropy alloy.MATERIALS CHEMISTRY AND PHYSICS,259,9.
MLA	Huang, Lei,et al."Analysis on the key role in corrosion behavior of CoCrNiAlTi-based high entropy alloy".MATERIALS CHEMISTRY AND PHYSICS 259(2021):9.