Corrosion failure analysis of pure nickel thermocouple sheath used in BaTiO(3) hydrothermal synthesis reactor

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	Corrosion failure analysis of pure nickel thermocouple sheath used in BaTiO(3) hydrothermal synthesis reactor
	X. Y. Zhong; X. Q. Wu; E. H. Han; X. B. Song
	2010
发表期刊	Engineering Failure Analysis
ISSN	1350-6307
卷号	17 期号:6 页码:1404-1412
摘要	This paper presents corrosion failure analysis on a commercial pure nickel thermocouple sheath used in BaTiO(3) hydrothermal synthesis reactor. Detailed investigations of the corrosion products have been performed using stereomicroscope, X-ray diffraction, scanning electron microscopy and energy-dispersive X-ray spectroscopy. It was found that the corrosion failure of the sheath was mainly due to general corrosion and crevice corrosion of pure nickel, and the main corrosion products were Ni(OH)(2). Many cracks were observed inside the corrosion products and along the interfaces between the corrosion products and metal matrix. BaTiO(3) particles were deposited as parallel white bands along the above cracks inside the corrosion products. Chloride ions also entered the cracks or crevices, resulting in the acidification inside the crevice and aggravated the attack of nickel matrix. Some recommendations to prevent/minimize future similar corrosion failures were proposed. (C) 2010 Elsevier Ltd. All rights reserved.
部门归属	[zhong, x. y.; wu, x. q.; han, e. h.] chinese acad sci, state key lab corros & protect, inst met res, shenyang 110016, peoples r china. [song, x. b.] shandong sinocera funct mat co ltd, dongying 257091, peoples r china.;wu, xq (reprint author), chinese acad sci, state key lab corros & protect, inst met res, south campus,62 wencui rd, shenyang 110016, peoples r china;xqwu@imr.ac.cn
关键词	Corrosion Failure Analysis Crevice Corrosion Pure Ni High Temperature High Pressure Crevice Corrosion Chloride
URL	查看原文
文献类型	期刊论文
条目标识符	http://ir.imr.ac.cn/handle/321006/31769
专题	中国科学院金属研究所
推荐引用方式 GB/T 7714	X. Y. Zhong,X. Q. Wu,E. H. Han,et al. Corrosion failure analysis of pure nickel thermocouple sheath used in BaTiO(3) hydrothermal synthesis reactor[J]. Engineering Failure Analysis,2010,17(6):1404-1412.
APA	X. Y. Zhong,X. Q. Wu,E. H. Han,&X. B. Song.(2010).Corrosion failure analysis of pure nickel thermocouple sheath used in BaTiO(3) hydrothermal synthesis reactor.Engineering Failure Analysis,17(6),1404-1412.
MLA	X. Y. Zhong,et al."Corrosion failure analysis of pure nickel thermocouple sheath used in BaTiO(3) hydrothermal synthesis reactor".Engineering Failure Analysis 17.6(2010):1404-1412.