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Nicotinic acid derivatives as corrosion inhibitors for mild steel in hydrochloric acid solutions: an experimental and computational chemistry study
Liu, Xia; Pan, Xuemei; Lu, Meiheng; Sun, Yue; Wang, Zhengbin; Zheng, Yugui
2020-07-03
Source PublicationJOURNAL OF ADHESION SCIENCE AND TECHNOLOGY
AbstractThe inhibition performance and mechanism of nicotinic acid (NA), nicotinic acid amide (NAA) and 4-methoxypyridine (MP) for the corrosion of mild steel in 0.5 M HCl solution were investigated and compared by means of experimental tests, including potentiodynamic polarization and electrochemical impedance spectroscopy measurements, surface analyses and quantum chemistry calculation. The electrochemical results show that the inhibition efficiencies of the three inhibitors increase with the concentration and decrease with the temperature. The NAA and MP inhibitors exhibit the highest and lowest efficiency and activation energy for the corrosion process, respectively, which is confirmed by the corrosion morphology observation. Fourier transform infrared analysis and X-ray photoelectron spectroscopy (XPS) analysis confirm the spontaneous adsorption of all three inhibitors on the surface. The adsorption analysis demonstrates that the adsorption process follows Langmuir model and consists of both physisorption and chemisorption. The quantum chemistry calculation correlates the molecular structures and charge density distributions with the corrosion inhibition efficiencies of NAA, NA and MP inhibitors, and further proves that the good inhibition performance of NAA inhibitor originates its high adsorption ability.
DOI10.1080/01694243.2020.1787934
WOS IDWOS:000546279700001
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Cited Times:3[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.imr.ac.cn/handle/321006/155690
Collection中国科学院金属研究所
Recommended Citation
GB/T 7714
Liu, Xia,Pan, Xuemei,Lu, Meiheng,et al. Nicotinic acid derivatives as corrosion inhibitors for mild steel in hydrochloric acid solutions: an experimental and computational chemistry study[J]. JOURNAL OF ADHESION SCIENCE AND TECHNOLOGY,2020.
APA Liu, Xia,Pan, Xuemei,Lu, Meiheng,Sun, Yue,Wang, Zhengbin,&Zheng, Yugui.(2020).Nicotinic acid derivatives as corrosion inhibitors for mild steel in hydrochloric acid solutions: an experimental and computational chemistry study.JOURNAL OF ADHESION SCIENCE AND TECHNOLOGY.
MLA Liu, Xia,et al."Nicotinic acid derivatives as corrosion inhibitors for mild steel in hydrochloric acid solutions: an experimental and computational chemistry study".JOURNAL OF ADHESION SCIENCE AND TECHNOLOGY (2020).
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