氯化2,3,5-三苯基-2氢-四唑及2,4,6-三(2-吡啶基)-s-三嗪在HCl中对碳钢的缓蚀作用

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氯化2,3,5-三苯基-2氢-四唑及2,4,6-三(2-吡啶基)-s-三嗪在HCl中对碳钢的缓蚀作用

庞雪辉¹; 侯保荣²; 李伟华²; 刘法谦³; 于志刚¹

¹ College of Chemistry and Chemical Engineering, Ocean University of China, Qingdao 266003, China
² Institute of Oceanology, Chinese Academy of Sciences, Qingdao 266071, China
³ New Materials & Function Coordination Chemistry Laboratory, Qingdao University of Science and Technology, Qingdao 266042, China

收稿日期:2007-02-26 修回日期:1900-01-01 出版日期:2007-12-28 发布日期:2007-12-28
通讯作者: 庞雪辉

2,3,5-Triphenyl-2H-tetrazolium chloride and 2,4,6-tri(2-pyridyl)-s-triazine on the corrosion of mild steel in HCl

PANG Xuehui¹; HOU Baorong²; LI Weihua²; LIU Faqian³; YU Zhigang¹

¹ College of Chemistry and Chemical Engineering, Ocean University of China, Qingdao 266003, China
² Institute of Oceanology, Chinese Academy of Sciences, Qingdao 266071, China
³ New Materials & Function Coordination Chemistry Laboratory, Qingdao University of Science and Technology, Qingdao 266042, China

Received:2007-02-26 Revised:1900-01-01 Online:2007-12-28 Published:2007-12-28
Contact: PANG Xuehui

摘要/Abstract

摘要： Electrochemical measurement, quantum chemical method, and scanning electron microscopy (SEM) were performed to investigate the inhibitive effect of 2,3,5-triphenyl-2H-tetrazolium chloride (TTC) and 2,4,6-tri(2-pyridyl) -s-triazine(TPT) on the corrosion of mild steel in 1mol•L－1 HCl at room temperature. Impedance spectroscopy measurement showed that the polarization resistance increased and that double layer capacitance de-creased with the increase in the inhibitive concentration, and the results of potentiodynamic polarization showed that the inhibitors suppressed both cathodic and anodic processes of steel corrosion without change in the mecha-nism. Higher the orbital density distribution strength of the lowest unoccupied molecular orbital, higher is the molecule dipole, and lower energy gap between the energy of the highest occupied molecular orbital and the energy of the lowest unoccupied molecular orbital resulted in higher inhibitory efficiency. The results of SEM analysis showed that the metal was protected from aggressive corrosion by the addition of TTC and TPT.

关键词: corrosion inhibition;quantum chemistry;electrochemical measurement;scanning electron microscopy

Abstract: Electrochemical measurement, quantum chemical method, and scanning electron microscopy (SEM) were performed to investigate the inhibitive effect of 2,3,5-triphenyl-2H-tetrazolium chloride (TTC) and 2,4,6-tri(2-pyridyl) -s-triazine(TPT) on the corrosion of mild steel in 1mol•L－1 HCl at room temperature. Impedance spectroscopy measurement showed that the polarization resistance increased and that double layer capacitance de-creased with the increase in the inhibitive concentration, and the results of potentiodynamic polarization showed that the inhibitors suppressed both cathodic and anodic processes of steel corrosion without change in the mecha-nism. Higher the orbital density distribution strength of the lowest unoccupied molecular orbital, higher is the molecule dipole, and lower energy gap between the energy of the highest occupied molecular orbital and the energy of the lowest unoccupied molecular orbital resulted in higher inhibitory efficiency. The results of SEM analysis showed that the metal was protected from aggressive corrosion by the addition of TTC and TPT.

Key words: corrosion inhibition, quantum chemistry, electrochemical measurement, scanning electron microscopy

庞雪辉, 侯保荣, 李伟华, 刘法谦, 于志刚. 氯化2,3,5-三苯基-2氢-四唑及2,4,6-三(2-吡啶基)-s-三嗪在HCl中对碳钢的缓蚀作用[J]. CIESC Journal.

PANG Xuehui, HOU Baorong, LI Weihua, LIU Faqian, YU Zhigang. 2,3,5-Triphenyl-2H-tetrazolium chloride and 2,4,6-tri(2-pyridyl)-s-triazine on the corrosion of mild steel in HCl[J]. .

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氯化2,3,5-三苯基-2氢-四唑及2,4,6-三(2-吡啶基)-s-三嗪在HCl中对碳钢的缓蚀作用

2,3,5-Triphenyl-2H-tetrazolium chloride and 2,4,6-tri(2-pyridyl)-s-triazine on the corrosion of mild steel in HCl

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