Failure analysis of leaking firefighting pipeline used in nuclear power plant: Corrosion development process and key influence factors

doi:10.1016/j.engfailanal.2024.108341

IMR OpenIR

	Failure analysis of leaking firefighting pipeline used in nuclear power plant: Corrosion development process and key influence factors
	Liu, Xiaozhen 1,2; Li, Nana 3; Zhang, Jin 3; Liu, Wenfang 3; Wang, Yuhui 3; Song, Yingwei 1,2; Dong, Kaihui 1,2; Cai, Yong 1,2; Han, En-Hou 1,4,5
通讯作者	Song, Yingwei(ywsong@imr.ac.cn)
	2024-07-01
发表期刊	ENGINEERING FAILURE ANALYSIS
ISSN	1350-6307
卷号	161 页码:14
摘要	A penetrating hole has been found in the inner wall of the firefighting pipeline (A106 steel) used for 20 years in a nuclear power plant of China, and the pipeline is filled with almost stagnant tap water before failure. The failed pipeline is taken from a vertically placed water outlet pipeline. The corrosion process and key influence factors of the failed firefighting pipeline were studied using optical microscopy (OM), scanning electron microscopy (SEM) and X-ray diffraction (XRD). The results show that there exist two typical corrosion characteristics on the inner wall of the failed pipeline besides leakage hole, that is, corrosion nodulation and corrosion bulge. The corrosion nodulation, mainly consisting of a mixture of calcium and iron oxides, is the initiation position of perforation corrosion, and the iron-oxidizing bacteria (IOB) play a key role in the formation of corrosion nodulation. Then the sulfate-reducing bacteria (SRB) is involved in the propagation of corrosion nodulation when the dissolved oxygen concentration is low. The corrosion nodulation gradually become loose and form large bulge with extended service time. The corrosion pits under the corrosion bulge also develop gradually. Eventually, the inner wall of the pipeline is thinned and perforated.
关键词	Firefighting pipeline A106 steel Corrosion nodulation Corrosion bulge Corrosion pit Microbial corrosion
资助者	LingChuang Research Project of China National Nuclear Corporation
DOI	10.1016/j.engfailanal.2024.108341
收录类别	SCI
语种	英语
资助项目	LingChuang Research Project of China National Nuclear Corporation
WOS研究方向	Engineering ; Materials Science
WOS类目	Engineering, Mechanical ; Materials Science, Characterization & Testing
WOS记录号	WOS:001293788800001
出版者	PERGAMON-ELSEVIER SCIENCE LTD
引用统计	被引频次：5[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/321006/189078
专题	中国科学院金属研究所
通讯作者	Song, Yingwei
作者单位	1.Chinese Acad Sci, Key Lab Nucl Mat & Safety Assessment, Inst Met Res, Shenyang 110016, Peoples R China 2.Univ Sci & Technol China, Sch Mat Sci & Engn, Shenyang 110016, Peoples R China 3.China Nucl Power Engn Co Ltd, Beijing 100089, Peoples R China 4.Inst Corros Sci & Technol, Guangzhou 510530, Peoples R China 5.South China Univ Technol, Sch Mat Sci & Engn, Guangzhou 510641, Peoples R China
推荐引用方式 GB/T 7714	Liu, Xiaozhen,Li, Nana,Zhang, Jin,et al. Failure analysis of leaking firefighting pipeline used in nuclear power plant: Corrosion development process and key influence factors[J]. ENGINEERING FAILURE ANALYSIS,2024,161:14.
APA	Liu, Xiaozhen.,Li, Nana.,Zhang, Jin.,Liu, Wenfang.,Wang, Yuhui.,...&Han, En-Hou.(2024).Failure analysis of leaking firefighting pipeline used in nuclear power plant: Corrosion development process and key influence factors.ENGINEERING FAILURE ANALYSIS,161,14.
MLA	Liu, Xiaozhen,et al."Failure analysis of leaking firefighting pipeline used in nuclear power plant: Corrosion development process and key influence factors".ENGINEERING FAILURE ANALYSIS 161(2024):14.