Corrosion Behavior of Plasma-Sprayed Al2O3-3%TiO2 Coatings Doped with CeO2

doi:10.1007/s11666-022-01484-z

IMR OpenIR

	Corrosion Behavior of Plasma-Sprayed Al2O3-3%TiO2 Coatings Doped with CeO2
	Zhang, Yu 1; Sun, Shilong 1; Zhao, Lin 2; Yang, Changdi 1,3; Wu, Liping 2; Guo, Yingjie 1; Ang, Andrew Siao Ming 4
通讯作者	Zhao, Lin(zhaolin@imr.ac.cn)
	2022-11-08
发表期刊	JOURNAL OF THERMAL SPRAY TECHNOLOGY
ISSN	1059-9630
页码	16
摘要	Coatings of Al2O3-3%TiO2 (AT3) and CeO2-doped Al2O3-3%TiO2 (1 wt% and 5 wt%) were prepared by plasma spraying. Scanning electron microscopy revealed that CeO2 was mainly distributed in the crevices and between the splat layers of the coating, filling the voids or spaces, and reducing the porosity of the coating. The coating phase was predominantly alpha-Al2O3, and the addition of rare earth oxide reduced the formation of gamma-Al2O3 in the coating. Cyclic polarization measurements showed that the pitting loop did not appear in the cyclic polarization curve of the coating when the rare earth oxide CeO2 content increased to 5 wt%, and the current density of the backward scanning was lower than that of the forward scanning. The results confirmed the higher compactness of the AT3 + 5%CeO2 structure, which can prevent the penetration of chloride ions, thus avoiding pitting. The electrochemical impedance spectroscopy results showed that the amplitude of the low-frequency impedance of Al2O3-3%TiO2-5%CeO2 was the highest compared to other coatings, which confirms that its corrosion resistance is the best in solution. The results of Mott-Schottky measurements showed that the number of gaps in the passive film of the coating decreased with CeO2 doping. With the increase of the doped rare earth content, the capacitance of the ceramic coating increases, which reduces the corrosion rate and improves the corrosion resistance of the coating.
关键词	Al2O3-3%TiO2 coating corrosion behavior plasma spray rare earth element
DOI	10.1007/s11666-022-01484-z
收录类别	SCI
语种	英语
WOS研究方向	Materials Science
WOS类目	Materials Science, Coatings & Films
WOS记录号	WOS:000880255600002
出版者	SPRINGER
引用统计	被引频次：6[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/321006/176615
专题	中国科学院金属研究所
通讯作者	Zhao, Lin
作者单位	1.Shenyang Univ, Sch Mech Engn, Shenyang 110044, Peoples R China 2.Chinese Acad Sci, Inst Met Res, Shenyang 110016, Peoples R China 3.Fushun New Steel Co Ltd, H Beam Project Dept, Fushun 113001, Peoples R China 4.Swinburne Univ Technol, ARC Ind Transformat Training Ctr Surface Engn Adv, Hawthorn, Vic 3122, Australia
推荐引用方式 GB/T 7714	Zhang, Yu,Sun, Shilong,Zhao, Lin,et al. Corrosion Behavior of Plasma-Sprayed Al2O3-3%TiO2 Coatings Doped with CeO2[J]. JOURNAL OF THERMAL SPRAY TECHNOLOGY,2022:16.
APA	Zhang, Yu.,Sun, Shilong.,Zhao, Lin.,Yang, Changdi.,Wu, Liping.,...&Ang, Andrew Siao Ming.(2022).Corrosion Behavior of Plasma-Sprayed Al2O3-3%TiO2 Coatings Doped with CeO2.JOURNAL OF THERMAL SPRAY TECHNOLOGY,16.
MLA	Zhang, Yu,et al."Corrosion Behavior of Plasma-Sprayed Al2O3-3%TiO2 Coatings Doped with CeO2".JOURNAL OF THERMAL SPRAY TECHNOLOGY (2022):16.