Accessible Requires Authentication Published by De Gruyter January 23, 2020

Preparation and Application of Modified Imidazole with MPEG (Polyethylene Glycol Monomethyl Ether) as Carbon Steel Inhibitor

Herstellung von mit MPEG (Polyethylenglykolmonomethylether) modifiziertem Imidazol und Anwendung als Kohlenstoffstahlinhibitor
Qiuli Nan, Li Song, Yuming Zhou, Qingzhao Yao, Xiaoli Sheng, Xiaoyong Xi, Yiyi Chen, Shengqiu Lin, Guiyu Guan and Wei Sun


The inhibition effect of three inhibitors with different chain lengths of their ether groups on Q235 steel in 0.5 M HCl solution at 318 K was determined by means of weight loss measureme nt, electrochemical methods (Tafel and EIS) and surface analysis (SEM). Moreover, the further study of corrosion inhibition mechanism was also conducted by computational methods (Quantum chemical calculations and Molecular dynamics simulations). Results reveal that the three inhibitors exhibit an excellent inhibition performance for carbon steel, and the corrosion inhibition efficiency of the three inhibitors increases with the increase of the chain length, which favors the formation of a protection film adsorbed on the surface. Analysis of polarization data informs that the adsorption type of three inhibitors basically obeys the Langmuir monolaye r adsorption, which is mainly of chemisorptive nature. Computational methods also tell that the three inhibitors possess a high reactivity and strong interaction with the iron surface, furthermore, the interaction is increased with the increase of the chain length of three inhibitors. The conclusion is in good agreement with the experimental results.


Die inhibierende Wirkung von drei Inhibitoren mit unterschiedlichen Kettenlängen ihrer Ethergruppen auf Q235-Stahl in 0,5 M HCl-Lösung bei 318 K wurde mittels Gewichtsverlustmessung, elektrochemischen Methoden (Tafel und EIS) und Oberflächenanalyse (SEM) bestimmt. Darüber hinaus wurde die weitere Untersuchung des Korrosionsinhibitionsmechanismus mit Computerverfahren (quantenchemischen Berechnungen und Molekulardynamiksimulationen) durchgeführt. Die Ergebnisse zeigen, dass drei Inhibitoren eine hervorragende Inhibierungsleistung für Kohlenstoffstahl zeigen, und die Korrosionsinhibierungseffizienz der drei Inhibitoren steigt mit der Zunahme der Kettenlänge, was die Bildung eines an der Oberfläche adsorbierten Schutzfilms begünstigt. Die Analyse der Polarisationsdaten zeigt, dass die Adsorptionsart für die drei Inhibitoren im Wesentlichen der Langmuir-Monoschichtadsorption entspricht, die hauptsächlich chemiosorptiv ist. Berechnungsmethoden zeigen auch, dass die drei Inhibitoren eine hohe Reaktivität und starke Wechselwirkun g an der Eisenoberfläche besitzen. Darüber hinaus wird die Wechselw irkung mit der Zunahme der Kettenlänge für die drei Inhibitoren erhöht. Die Schlussfolgerung stimmt gut mit den experimentellen Ergebnis sen überein.

Prof. Yuming Zhou, School of Chemistry and Chemical Engineering, Southeast University, Nanjing 211189, P.R. China, E-Mail:
Prof. Qingzhao Yao, Southeast University, Nanjing 211189, P.R. China, E-Mail:

Qiuli Nan was born in 1980. She is graduated from southeast University in 2007, and she is a teacher at Cheng Xian College, Southeast University. Her main field of research is applications of water soluble polymers in industrial water systems and green chemical.

Li Song was born in 1993. He is a postgraduate at Southeast University. His main field of research is applications of water soluble polymers in industrial water systems and green chemical.

Prof. Yuming Zhou was born in 1964. He graduated from Nanjing University in 1986. He obtained his PhD in Department of Biomedical Southeast University. His research interests lie in organic material, fine chemicals and environmental protectio n. At the moment is associate dean of the School of Chemistry and Chemical Engineering Southeast University

Qingzhao Yao was born in 1973. She is an associate professor at Southeast University. Her main field of research is applications of water soluble polymers in industrial water systems and green chemical.

Xiaoli Shen was born in 1973. She is an associate professor at Southeast University. Her main field of research is applications of water soluble polymers in industrial water systems and green chemical.

Xiaoyong Xi was born in 1992. He is a postgraduate at Southeast University. His main scientific interest has been the synthesis and properties of environment friendly materials.

Yiyi Chen was born in 1990. She is a doctoral student at Southeast University. Her main field of research is applications of water soluble polymers in industrial water systems and green chemical. Xiangnan Chen was born in 1992. She is an undergraduate at Cheng Xian College, Southeast University.

Shengqiu Lin and Guiyu Guan were born in 1998. They are undergraduate college students at Southeast University, majoring in pharmaceutical engineering.

Wei Sun was born in 1979. He received his bachelor degree in applied chemical from Nanjing University in 2004. He is now working at Jiangsu Jianghai Chemical Co., Ltd., Changzhou China. His main field of research is synthesis and application of surfactants.


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Received: 2018-12-13
Accepted: 2019-04-17
Published Online: 2020-01-23
Published in Print: 2020-01-21

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