CORROSION BEHAVIORS OF INCONEL 690TT AND INCOLOY 800MA STEAM GENERATOR TUBES IN HIGH TEMPERATURE HIGH PRESSURE WATER

doi:10.11900/0412.1961.2016.00276

IMR OpenIR

	CORROSION BEHAVIORS OF INCONEL 690TT AND INCOLOY 800MA STEAM GENERATOR TUBES IN HIGH TEMPERATURE HIGH PRESSURE WATER
	Wang Jianqiu; Huang Fa; Ke Wei
通讯作者	Ke Wei(kewei@imr.ac.cn)
	2016-10-01
发表期刊	ACTA METALLURGICA SINICA
ISSN	0412-1961
卷号	52 期号:10 页码:1333-1344
摘要	Inconel 690TT and Incoloy 800MA have been widely used as steam generator heat transfer tubes in nuclear power plants (NPPs). The corrosion behaviors of these two alloys in high temperature high pressure water have to be fully addressed. This work systematically studied the microstructures of the as-received Inconel 690TT and Incoloy 800MA steam generator tubes (SGTs) and compared the oxide films formed on the tubing materials in high temperature water using several analytical methods including SEM, EBSD, GIXRD, SAED and STEM. The results show that from outer surface to inner surface of Inconel 690TT SGTs, the deviation degrees from the ideal Sigma 3 misorientation and the average value of Kernel average misorientation (KAM) gradually increase. The outer surface of Inconel 690TT SGTs are weakest. For Incoloy 800MA SGTs, the deviation degrees from the ideal Sigma 3 misorientation are within 0 similar to 1 degrees, and the change of KAM average value is small. Exposed to 325 degrees C pure water containing 0.75x10(-6) O-2 for 720 h, oxide films of both Inconel 690TT SGTs and Incoloy 800MA SGTs have duplex structure. On Inconel 690TT SGTs, the outer layer is Fe-rich spinel and small NiO particles; the inner layer mainly is NiO, porous and less protective with the thickness of 716 nm. On Incoloy 800MA SGTs, the outer layer is big polyhedral spinel; the inner layer is small polyhedral spinel and protective with the average thickness of 150 nm; Cr is enriched at the interface between inner oxide layer and matrix. In high temperature water with dissolved oxygen, due to the preferential dissolution of Cr, Incoloy 800MA is more corrosion resistant than In-conel 690TT.
关键词	Inconel 690TT Incoloy 800MA high temperature high pressure water oxide film
资助者	National Funds for Distinguished Young Scholars
DOI	10.11900/0412.1961.2016.00276
收录类别	SCI
语种	英语
资助项目	National Funds for Distinguished Young Scholars[51025104]
WOS研究方向	Metallurgy & Metallurgical Engineering
WOS类目	Metallurgy & Metallurgical Engineering
WOS记录号	WOS:000390080900017
出版者	SCIENCE PRESS
引用统计	被引频次：2[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/321006/123270
专题	中国科学院金属研究所
通讯作者	Ke Wei
作者单位	Chinese Acad Sci, Inst Met Res, Key Lab Nucl Mat & Safety Assessment, Shenyang 110016, Peoples R China
推荐引用方式 GB/T 7714	Wang Jianqiu,Huang Fa,Ke Wei. CORROSION BEHAVIORS OF INCONEL 690TT AND INCOLOY 800MA STEAM GENERATOR TUBES IN HIGH TEMPERATURE HIGH PRESSURE WATER[J]. ACTA METALLURGICA SINICA,2016,52(10):1333-1344.
APA	Wang Jianqiu,Huang Fa,&Ke Wei.(2016).CORROSION BEHAVIORS OF INCONEL 690TT AND INCOLOY 800MA STEAM GENERATOR TUBES IN HIGH TEMPERATURE HIGH PRESSURE WATER.ACTA METALLURGICA SINICA,52(10),1333-1344.
MLA	Wang Jianqiu,et al."CORROSION BEHAVIORS OF INCONEL 690TT AND INCOLOY 800MA STEAM GENERATOR TUBES IN HIGH TEMPERATURE HIGH PRESSURE WATER".ACTA METALLURGICA SINICA 52.10(2016):1333-1344.