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Characterization, electrochemical and theoretical study of the anticorrosion properties of Moringa oleifera extract
Njoku, Demian I.; Oguzie, Emeka E.; Li, Ying; Li, Y (reprint author), Chinese Acad Sci, Inst Met Res, 62 Wencui Rd, Shenyang 110016, Peoples R China.
2017-07-01
发表期刊JOURNAL OF MOLECULAR LIQUIDS
ISSN0167-7322
卷号237页码:247-256
摘要We describe a combined experimental and density functional study of the corrosion protection of Q235 carbon steel in 0.25 M H2SO4 + 0.5 M NaCl solution by Moringa oleifera extract. The extract was characterized for this purpose using Furrier transformed infra-red spectroscopy (FTIR) and gas chromatography interfaced with mass spectroscopy (GC-MS). Corrosion protection efficiency increased with extract concentration but decreased slightly over prolonged exposure time. The various electrochemical and spectroscopic measurements revealed adsorption of organic constituents of the extract on the steel surface, while the protective effect of the adsorbed extract constituents was confirmed by surface microscopy examinations. Density functional theory calculations were undertaken to describe the electronic and adsorption properties of the constituents identified in the extract. (C) 2017 Published by Elsevier B.V.; We describe a combined experimental and density functional study of the corrosion protection of Q235 carbon steel in 0.25 M H2SO4 + 0.5 M NaCl solution by Moringa oleifera extract. The extract was characterized for this purpose using Furrier transformed infra-red spectroscopy (FTIR) and gas chromatography interfaced with mass spectroscopy (GC-MS). Corrosion protection efficiency increased with extract concentration but decreased slightly over prolonged exposure time. The various electrochemical and spectroscopic measurements revealed adsorption of organic constituents of the extract on the steel surface, while the protective effect of the adsorbed extract constituents was confirmed by surface microscopy examinations. Density functional theory calculations were undertaken to describe the electronic and adsorption properties of the constituents identified in the extract. (C) 2017 Published by Elsevier B.V.
部门归属[njoku, demian i.] univ chinese acad sci, inst met res, 19a yuquan rd, beijing 100049, peoples r china ; [njoku, demian i. ; oguzie, emeka e. ; li, ying] chinese acad sci, inst met res, 62 wencui rd, shenyang 110016, peoples r china ; [oguzie, emeka e.] fed univ technol owerri, dept chem, electrochem & mat sci res lab, pmb 1526, owerri, nigeria
关键词Carbon Steel Nacl/h2so4 Gc-ms Ftir Adsorption Molecular Dynamics
学科领域Chemistry, Physical ; Physics, Atomic, Molecular & Chemical
资助者CAS President's International Fellowship Initiative Program; National Natural Science Foundation of China-International Cooperation and Exchange Program [2015PT005]; National Natural Science Fund of China [51131007, 51371181]
收录类别SCI
语种英语
文献类型期刊论文
条目标识符http://ir.imr.ac.cn/handle/321006/78065
专题中国科学院金属研究所
通讯作者Li, Y (reprint author), Chinese Acad Sci, Inst Met Res, 62 Wencui Rd, Shenyang 110016, Peoples R China.
推荐引用方式
GB/T 7714
Njoku, Demian I.,Oguzie, Emeka E.,Li, Ying,et al. Characterization, electrochemical and theoretical study of the anticorrosion properties of Moringa oleifera extract[J]. JOURNAL OF MOLECULAR LIQUIDS,2017,237:247-256.
APA Njoku, Demian I.,Oguzie, Emeka E.,Li, Ying,&Li, Y .(2017).Characterization, electrochemical and theoretical study of the anticorrosion properties of Moringa oleifera extract.JOURNAL OF MOLECULAR LIQUIDS,237,247-256.
MLA Njoku, Demian I.,et al."Characterization, electrochemical and theoretical study of the anticorrosion properties of Moringa oleifera extract".JOURNAL OF MOLECULAR LIQUIDS 237(2017):247-256.
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