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高等学校化学研究 ›› 2019, Vol. 35 ›› Issue (6): 1046-1051.doi: 10.1007/s40242-019-9171-9

• Articles • 上一篇    下一篇

Study of the Synergistic Effect Between Corrosion Inhibitors by Using Fractional Free Volume

LU Yuan1, ZHANG Chen2, WANG Wei1, ZHAO Jingmao1,3   

  1. 1. College of Materials Science and Engineering, Beijing University of Chemical Technology, Beijing 100029, P. R. China;
    2. Sinopec Marking South China Company, Guangzhou 510620, P. R. China;
    3. Beijing Key Laboratory of Electrochemical Process and Technology for Materials, Beijing University of Chemical Technology, Beijing 100029, P. R. China
  • 收稿日期:2019-06-21 修回日期:2019-08-02 出版日期:2019-12-01 发布日期:2019-11-29
  • 通讯作者: ZHAO Jingmao E-mail:jingmaozhao@126.com
  • 基金资助:
    Supported by the National Natural Science Foundation of China(No.51471021).

Study of the Synergistic Effect Between Corrosion Inhibitors by Using Fractional Free Volume

LU Yuan1, ZHANG Chen2, WANG Wei1, ZHAO Jingmao1,3   

  1. 1. College of Materials Science and Engineering, Beijing University of Chemical Technology, Beijing 100029, P. R. China;
    2. Sinopec Marking South China Company, Guangzhou 510620, P. R. China;
    3. Beijing Key Laboratory of Electrochemical Process and Technology for Materials, Beijing University of Chemical Technology, Beijing 100029, P. R. China
  • Received:2019-06-21 Revised:2019-08-02 Online:2019-12-01 Published:2019-11-29
  • Contact: ZHAO Jingmao E-mail:jingmaozhao@126.com
  • Supported by:
    Supported by the National Natural Science Foundation of China(No.51471021).

摘要: The fractional free volumes(FFVs) of the adsorption films formed with different ratios of dipropargyl methoxythiourea imidazoline(DPFTAI) and pyridine quaternary ammonium salt(16BD) were calculated by simulation to determine their synergistic corrosion inhibition effect. The results suggest that the composite corrosion inhibitor at the molar ratio between DPFTAI and 16BD of 4:1 gives the best corrosion inhibition effect. This simulation method to predict the synergistic effect between corrosion inhibitors was further validated by mass loss and electrochemical experiments. This finding delivers valuable understandings of inhibition mechanism of corrosion inhibitors.

关键词: CO2/H2S corrosion, Imidazoline, Corrosion inhibitor, Synergistic effect, Fractional free volume

Abstract: The fractional free volumes(FFVs) of the adsorption films formed with different ratios of dipropargyl methoxythiourea imidazoline(DPFTAI) and pyridine quaternary ammonium salt(16BD) were calculated by simulation to determine their synergistic corrosion inhibition effect. The results suggest that the composite corrosion inhibitor at the molar ratio between DPFTAI and 16BD of 4:1 gives the best corrosion inhibition effect. This simulation method to predict the synergistic effect between corrosion inhibitors was further validated by mass loss and electrochemical experiments. This finding delivers valuable understandings of inhibition mechanism of corrosion inhibitors.

Key words: CO2/H2S corrosion, Imidazoline, Corrosion inhibitor, Synergistic effect, Fractional free volume