Cathodic protection criteria of low alloy steel in simulated deep water environment

doi:10.1108/ACMM-12-2019-2223

IMR OpenIR

	Cathodic protection criteria of low alloy steel in simulated deep water environment
	Sun Haijing 1; Xue Weihai 2; Xu Jiaxin 3; Chen Guoliang 3; Sun Jie 4
通讯作者	Sun Haijing(hjsun@alum.imr.ac.cn)
	2020-04-27
发表期刊	ANTI-CORROSION METHODS AND MATERIALS
ISSN	0003-5599
卷号	67 期号:4 页码:7
摘要	Purpose The purpose of this work is to provide theoretical guidance and experimental analysis for optimized cathodic protection (CP) design of low alloy steel in deep water environments. Design/methodology/approach In the present study, the CP criteria of 10Ni5CrMoV low alloy steel were investigated in a simulated deep water environment (350 m) regarding the theoretical protection potential and measured protection potential. The influences of hydrostatic pressure (HP) and temperature were also discussed in detail. The theoretical protection potential was analyzed with the Nernst equation, and the measured minimum protection potential was derived by extrapolating the Tafel portion of anodic polarization curves. Findings The results indicate that the minimum protection potential of low alloy steel shifts to a positive value in a deep-ocean environment. This can be attributed to the combined effects of HP and the temperature. Moreover, the temperature has a stronger influence compared with HP. The results suggest that the CP potential criteria used in shallow water are still applicable in the deep ocean, which is further confirmed through the SEM and x-ray diffraction analysis of the corrosion products resulted from the potentiostatic cathodic polarization experiments at -0.85 V-CSE. Originality/value In recent decades, successful applications of CP for long-term corrosion protection of the steel components applied at a subsea level have enabled the offshore industry to develop reliable and optimized CP systems for shallow water. However, differences in the seawater environment at greater depths have raised concerns regarding the applicability of the existing CP design for deeper water environments. Hence, this research focuses on the CP criteria of low alloy steel in simulated deep water environment concerning the theoretical protection potential and measured protection potential. The influences of HP and temperature were also discussed.
关键词	Polarization Low alloy steel Cathodic protection potential Deep water environment Tafel line
资助者	Seedling Cultivation Project for Young Scientific and Technological Talents of Liaoning Education Department ; Doctor's Fund of Liaoning province
DOI	10.1108/ACMM-12-2019-2223
收录类别	SCI
语种	英语
资助项目	Seedling Cultivation Project for Young Scientific and Technological Talents of Liaoning Education Department[LG201928] ; Doctor's Fund of Liaoning province[201601181]
WOS研究方向	Metallurgy & Metallurgical Engineering
WOS类目	Metallurgy & Metallurgical Engineering
WOS记录号	WOS:000529547800001
出版者	EMERALD GROUP PUBLISHING LTD
引用统计	被引频次：1[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/321006/138663
专题	中国科学院金属研究所
通讯作者	Sun Haijing
作者单位	1.Shenyang Ligong Univ, Dept Environm & Chem Engn, Shenyang, Peoples R China 2.Chinese Acad Sci, Inst Met Res, Shenyang, Peoples R China 3.Shenyang Ligong Univ, Shenyang, Peoples R China 4.Shenyang Ligong Univ, Sch Environm & Chem Engn, Shenyang, Peoples R China
推荐引用方式 GB/T 7714	Sun Haijing,Xue Weihai,Xu Jiaxin,et al. Cathodic protection criteria of low alloy steel in simulated deep water environment[J]. ANTI-CORROSION METHODS AND MATERIALS,2020,67(4):7.
APA	Sun Haijing,Xue Weihai,Xu Jiaxin,Chen Guoliang,&Sun Jie.(2020).Cathodic protection criteria of low alloy steel in simulated deep water environment.ANTI-CORROSION METHODS AND MATERIALS,67(4),7.
MLA	Sun Haijing,et al."Cathodic protection criteria of low alloy steel in simulated deep water environment".ANTI-CORROSION METHODS AND MATERIALS 67.4(2020):7.