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

doi:10.1108/ACMM-12-2019-2223

CORC > 金属研究所 > 中国科学院金属研究所

	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
刊名	ANTI-CORROSION METHODS AND MATERIALS
	2020-04-27
页码	7
关键词	Polarization Low alloy steel Cathodic protection potential Deep water environment Tafel line
ISSN号	0003-5599
DOI	10.1108/ACMM-12-2019-2223
通讯作者	Sun Haijing(hjsun@alum.imr.ac.cn)
英文摘要	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.
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
语种	英语
出版者	EMERALD GROUP PUBLISHING LTD
WOS记录号	WOS:000529547800001
资助机构	Seedling Cultivation Project for Young Scientific and Technological Talents of Liaoning Education Department ; Doctor's Fund of Liaoning province
内容类型	期刊论文
源URL	[http://ir.imr.ac.cn/handle/321006/138664]
专题	金属研究所_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,2020:7.
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,7.
MLA	Sun Haijing,et al."Cathodic protection criteria of low alloy steel in simulated deep water environment".ANTI-CORROSION METHODS AND MATERIALS (2020):7.