Optimization and understanding of corrosion inhibitors for cooling water system

doi:10.1108/ACMM-02-2023-2754

IMR OpenIR

	Optimization and understanding of corrosion inhibitors for cooling water system
	Li, Zimin 1,2; Zhu, Zilong 3; Wang, Jianqiu 1,4; Wang, Meng 1,2; Hou, Ting 5; Li, Qinghua 5; Yu, Pei 5
通讯作者	Li, Zimin(zmli@icost.ac.cn)
	2023-07-03
发表期刊	ANTI-CORROSION METHODS AND MATERIALS
ISSN	0003-5599
页码	9
摘要	PurposeTwo corrosion inhibitors for closed cooling water systems, nitrite-based and mixture of nitrite and molybdate corrosion inhibitor, are often compared to each other. This study aims to optimize these two inhibitors in terms of concentration and pH for carbon steel protection, with insights into the double layer structure on surface and its impact on corrosion inhibition. Design/methodology/approachElectrochemical analysis including electrochemical impedance spectroscopy and potentiodynamic test are carried out for quick assessment of corrosion inhibition efficiency and optimization, which is confirmed by immersion test and microscopic analysis. The electronic properties of the surface film are analyzed through Mott-Schottky method which provides new insights into the inhibition mechanism and the role of each component in mixture inhibitor. FindingsMixture of nitrite and molybdate is shown to present higher inhibition efficiency, owning to the double layer structure. Nitrite alone can form a protective surface film, whereas molybdate leads to an n-type semiconductive film with lower donor density, hence giving rise to a better inhibition effect. Research limitations/implicationsSurface after inhibitor treatment has been carefully characterized to the microscopic scale, implying the effect of micro-structure, chemical composition and electronic properties on the corrosion resistance. Inorganic corrosion inhibitors can be tuned to provide higher efficiency by careful design of surface film structure and composition. Originality/valueAlmost every study on corrosion inhibitor applies such method for quick assessment of corrosion inhibition effect. Mott-Schottky test is one of electrochemical methods that reveals the electronic properties of the surface film. Previous works have studied the surface layer mainly through X-ray photoelectron spectroscopy. This study provides another insight into the surface film treated by nitrite and molybdate through Mott-Schottky analysis, and relates this structure to the corrosion inhibition effect based on multiple analysis including electrochemistry, microscopic characterization, thermodynamics and interface chemistry.
关键词	Corrosion inhibitor Nitrite Mott-Schottky CCWS Molybdate
DOI	10.1108/ACMM-02-2023-2754
收录类别	SCI
语种	英语
WOS研究方向	Metallurgy & Metallurgical Engineering
WOS类目	Metallurgy & Metallurgical Engineering
WOS记录号	WOS:001015985300001
出版者	EMERALD GROUP PUBLISHING 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/321006/178322
专题	中国科学院金属研究所
通讯作者	Li, Zimin
作者单位	1.Chinese Acad Sci, Inst Met Res, Shenyang, Peoples R China 2.Inst Corros Sci & Technol, Guangzhou, Peoples R China 3.Guangzhou Univ, Sch Phys & Mat Sci, Guangzhou, Peoples R China 4.Key Lab Nucl Mat & Safety Assessment, Shenyang, Peoples R China 5.China Nucl Power Engn Co Ltd, Beijing, Peoples R China
推荐引用方式 GB/T 7714	Li, Zimin,Zhu, Zilong,Wang, Jianqiu,et al. Optimization and understanding of corrosion inhibitors for cooling water system[J]. ANTI-CORROSION METHODS AND MATERIALS,2023:9.
APA	Li, Zimin.,Zhu, Zilong.,Wang, Jianqiu.,Wang, Meng.,Hou, Ting.,...&Yu, Pei.(2023).Optimization and understanding of corrosion inhibitors for cooling water system.ANTI-CORROSION METHODS AND MATERIALS,9.
MLA	Li, Zimin,et al."Optimization and understanding of corrosion inhibitors for cooling water system".ANTI-CORROSION METHODS AND MATERIALS (2023):9.