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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, Xia1; Okafor, Peter C.2,3; Pan, Xuemei1; Njoku, Demian I.4; Uwakwe, Kelechi J.5; Zheng, Yugui2
Corresponding AuthorOkafor, Peter C.(pcokafor@unical.edu.ng)
2020-04-06
Source PublicationJOURNAL OF ADHESION SCIENCE AND TECHNOLOGY
ISSN0169-4243
Volume34Issue:19Pages:28
AbstractThe 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.
KeywordAdsorption amino acids cerium complex corrosion inhibition rare earth metals
Funding OrganizationChinese Academy of Sciences Visiting Professorship for Senior International Scientists
DOI10.1080/01694243.2020.1749474
Indexed BySCI
Language英语
Funding ProjectChinese Academy of Sciences Visiting Professorship for Senior International Scientists[2019VEA0030]
WOS Research AreaEngineering ; Materials Science ; Mechanics
WOS SubjectEngineering, Chemical ; Materials Science, Multidisciplinary ; Mechanics
WOS IDWOS:000557519900001
PublisherTAYLOR & FRANCIS LTD
Citation statistics
Cited Times:2[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.imr.ac.cn/handle/321006/140128
Collection中国科学院金属研究所
Corresponding AuthorOkafor, Peter C.
Affiliation1.Shenyang Univ Chem Technol, Dept Appl Chem, Shenyang, Liaoning, Peoples R China
2.Chinese Acad Sci, Inst Met Res, Key Lab Nucl Mat & Safety Assessment, Shenyang, Liaoning, Peoples R China
3.Univ Calabar, Dept Pure & Appl Chem, Corros & Electrohem Res Grp, Calabar, Nigeria
4.Chinese Acad Sci, Inst Met Res, Lab Corros & Protect, Shenyang, Liaoning, Peoples R China
5.Chinese Acad Sci, Dalian Inst Chem Phys, State Key Lab Catalysis, Dalian, Liaoning, Peoples R China
Recommended Citation
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,2020,34(19):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,34(19),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 34.19(2020):28.
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