Study on salt spray corrosion of Ni-graphite abradable coating with 80Ni20Al and 96NiCr-4Al as bonding layers

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	Study on salt spray corrosion of Ni-graphite abradable coating with 80Ni20Al and 96NiCr-4Al as bonding layers
	Xu, Cunguan 1,2; Du, Lingzhong 1; Yang, Bin 2; Zhang, Weigang 1
刊名	SURFACE & COATINGS TECHNOLOGY
	2011-05-25
卷号	205 期号:17-18 页码:4154-4161
关键词	Abradable coating Bond coating Thermal spraying Salt spray corrosion Polarization
ISSN号	0257-8972
通讯作者	Zhang, WG
英文摘要	Two kinds of Ni-graphite abradable coating systems (coating system A with 80Ni20Al bond coating and coating system B with 96NiCr-4Al bond coating) were prepared. The top and the bond coatings were independently deposited by different techniques of flame and plasma spraying. Corrosion behavior of the coating systems was investigated via the electrochemical and salt spray corrosion tests. Open-circuit potential and polarization tests were carried out in an oxygen-saturated 5 wt.% NaCl neutral solutions at 35 degrees C. It was found that the 80Ni20Al coating exhibited the lowest corrosion resistance. Results of the salt spray corrosion (SSC) tests support a corrosion mechanism in the Ni-graphite coating being a crevice corrosion, which leads to loose corrosion products accumulated on the surface of the coating systems. For coating system A, analysis of the corrosion damage of the bonding layer showed a prevalent localized attack on intersplat boundaries. For coating system B, the bonding layer exhibited less corrosion, but the matrix of the top coating close to the interface corroded heavily due to a galvanic coupling between these two different coating layers. Experimental results after 960 h SSC tests showed that the bonding strength decreased to 3.5 MPa and 2.6 MPa for coating systems A and B, respectively. (C) 2011 Elsevier B.V. All rights reserved.
WOS标题词	Science & Technology ; Technology ; Physical Sciences
类目[WOS]	Materials Science, Coatings & Films ; Physics, Applied
研究领域[WOS]	Materials Science ; Physics
关键词[WOS]	STAINLESS-STEEL ; ELECTROCHEMICAL-BEHAVIOR ; MECHANICAL-PROPERTIES ; WEAR BEHAVIOR ; PERFORMANCE ; EVOLUTION ; OXIDATION ; ALLOY ; AL
收录类别	SCI
语种	英语
WOS记录号	WOS:000291295200005
公开日期	2013-11-05
内容类型	期刊论文
版本	出版稿
源URL	[http://ir.ipe.ac.cn/handle/122111/4871]
专题	过程工程研究所_多相复杂系统国家重点实验室
作者单位	1.Chinese Acad Sci, Inst Proc Engn, State Key Lab Multiphase Complex Syst, Beijing 100190, Peoples R China 2.Univ Sci & Technol Beijing, State Key Lab Adv Met & Mat, Beijing 100083, Peoples R China
推荐引用方式 GB/T 7714	Xu, Cunguan,Du, Lingzhong,Yang, Bin,et al. Study on salt spray corrosion of Ni-graphite abradable coating with 80Ni20Al and 96NiCr-4Al as bonding layers[J]. SURFACE & COATINGS TECHNOLOGY,2011,205(17-18):4154-4161.
APA	Xu, Cunguan,Du, Lingzhong,Yang, Bin,&Zhang, Weigang.(2011).Study on salt spray corrosion of Ni-graphite abradable coating with 80Ni20Al and 96NiCr-4Al as bonding layers.SURFACE & COATINGS TECHNOLOGY,205(17-18),4154-4161.
MLA	Xu, Cunguan,et al."Study on salt spray corrosion of Ni-graphite abradable coating with 80Ni20Al and 96NiCr-4Al as bonding layers".SURFACE & COATINGS TECHNOLOGY 205.17-18(2011):4154-4161.