Corrosion inhibition and adsorption properties of cerium-amino acid complexes on mild steel in acidic media: Experimental and DFT studies

doi:10.1080/01694243.2020.1749474

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	Corrosion inhibition and adsorption properties of cerium-amino acid complexes on mild steel in acidic media: Experimental and DFT studies
	Liu, Xia 2; Okafor, Peter C.3,4; Pan, Xuemei 2; Njoku, Demian I.5; Uwakwe, Kelechi J.1; Zheng, Yugui 3
刊名	JOURNAL OF ADHESION SCIENCE AND TECHNOLOGY
	2020-04-06
页码	28
关键词	Adsorption amino acids cerium complex corrosion inhibition rare earth metals
ISSN号	0169-4243
DOI	10.1080/01694243.2020.1749474
通讯作者	Okafor, Peter C.(pcokafor@unical.edu.ng)
英文摘要	The corrosion inhibition and adsorption behavior of glutamic acid (Glu), glutamine (Gln), and their cerium complexes: cerium glutamate (Ce(Glu)) and cerium glutamine (Ce(Gln)) on mild steel in 0.5 M HCl solutions were studied at 25 and 55 degrees C and concentration range of 25-200 ppm using potentiodynamic polarization (PDP) and electrochemical impedance spectroscopic (EIS) techniques. The inhibition efficiency was found to be dependent on the concentration and temperature of the system. The potentiodynamic polarization results suggest that the compounds act as mixed-type inhibitors with dominant cathodic inhibition. The mechanism of adsorption deduced from the variation of inhibition efficiency with temperature, as well as the activation parameters, suggest significant physisorption of the inhibitor molecules on the metal surface. The experimental data adhere to the Langmuir and El-Awady et al. kinetic adsorption models. The extent of inhibition was found to be Ce-Gln > Gln and Ce-Glu > Glu. The scanning electron microscope was employed for the morphological studies and the characteristic of the protective layer on the steel surface verified using UV-Vis spectroscopy and FTIR spectroscopy. Adsorption of the inhibitors on Fe (110) surface was evaluated theoretically.
资助项目	Chinese Academy of Sciences Visiting Professorship for Senior International Scientists[2019VEA0030]
WOS研究方向	Engineering ; Materials Science ; Mechanics
语种	英语
出版者	TAYLOR & FRANCIS LTD
WOS记录号	WOS:000557519900001
资助机构	Chinese Academy of Sciences Visiting Professorship for Senior International Scientists
内容类型	期刊论文
源URL	[http://ir.imr.ac.cn/handle/321006/140130]
专题	金属研究所_中国科学院金属研究所
通讯作者	Okafor, Peter C.
作者单位	1.Chinese Acad Sci, Dalian Inst Chem Phys, State Key Lab Catalysis, Dalian, Liaoning, Peoples R China 2.Shenyang Univ Chem Technol, Dept Appl Chem, Shenyang, Liaoning, Peoples R China 3.Chinese Acad Sci, Inst Met Res, Key Lab Nucl Mat & Safety Assessment, Shenyang, Liaoning, Peoples R China 4.Univ Calabar, Dept Pure & Appl Chem, Corros & Electrohem Res Grp, Calabar, Nigeria 5.Chinese Acad Sci, Inst Met Res, Lab Corros & Protect, Shenyang, Liaoning, Peoples R China
推荐引用方式 GB/T 7714	Liu, Xia,Okafor, Peter C.,Pan, Xuemei,et al. Corrosion inhibition and adsorption properties of cerium-amino acid complexes on mild steel in acidic media: Experimental and DFT studies[J]. JOURNAL OF ADHESION SCIENCE AND TECHNOLOGY,2020:28.
APA	Liu, Xia,Okafor, Peter C.,Pan, Xuemei,Njoku, Demian I.,Uwakwe, Kelechi J.,&Zheng, Yugui.(2020).Corrosion inhibition and adsorption properties of cerium-amino acid complexes on mild steel in acidic media: Experimental and DFT studies.JOURNAL OF ADHESION SCIENCE AND TECHNOLOGY,28.
MLA	Liu, Xia,et al."Corrosion inhibition and adsorption properties of cerium-amino acid complexes on mild steel in acidic media: Experimental and DFT studies".JOURNAL OF ADHESION SCIENCE AND TECHNOLOGY (2020):28.