物理化学学报 >> 2008, Vol. 24 >> Issue (01): 138-142.doi: 10.3866/PKU.WHXB20080124

研究论文 上一篇    下一篇

咪唑啉衍生物缓蚀剂对碳钢在CO2盐水中的缓蚀机理

刘福国; 杜敏; 张静; 仇萌   

  1. 中国海洋大学化学化工学院, 海洋化学理论与工程技术教育部重点实验室, 山东 青岛 266100
  • 收稿日期:2007-07-17 修回日期:2007-09-28 发布日期:2008-01-05
  • 通讯作者: 刘福国 E-mail:fuguoliu@gmail.com

Inhibition Mechanismof Imidazoline Derivative Inhibitor for Q235 Steel in Saltwater Saturated with CO2

LIU Fu-Guo; DU Min; ZHANG Jing; QIU Meng   

  1. Key Laboratory of Marine Chemistry Theory and Technology, Ministry of Education, College of Chemistry and Chemical Engineering, Ocean University of China, Qingdao 266100, Shandong Province, P. R. China
  • Received:2007-07-17 Revised:2007-09-28 Published:2008-01-05
  • Contact: LIU Fu-Guo E-mail:fuguoliu@gmail.com

摘要: 采用极化曲线和交流阻抗研究新合成咪唑啉衍生物缓蚀剂对碳钢在饱和CO2盐水中的缓蚀性能和机理. 计算了缓蚀效率和热力学参数. 缓蚀效率随着缓蚀剂浓度增大而增加, 但随着温度增加先增加后降低. 咪唑啉衍生物在碳钢表面的吸附符合Langmuir等温式. 电化学结论由量子化学计算补充说明.

关键词: 交流阻抗, 极化, 缓蚀剂, Langmuir等温式, 量子化学

Abstract: Laboratory investigations (polarization and electrochemical impedance spectroscopy) were performed in order to assess the effectiveness and the inhibition mechanism of new synthesized imidazoline derivative inhibitor to prevent corrosion of steel in saltwater saturated with carbon dioxide. The inhibitor efficiencies and thermodynamic parameters were calculated. The inhibition efficiency increased with the increase in inhibitor concentration, but increased then decreased with temperature. It was seen that the adsorption of imidazoline derivative on steel fitted the Langmuir isothermequation. The electrochemical results have also been supplemented by quantumchemical analysis.

Key words: EIS, Potentiodynamic polarization, Corrosion inhibitor, Langmuir isotherm, Quantum chemistry

MSC2000: 

  • O646