应用化学 ›› 2015, Vol. 32 ›› Issue (4): 464-471.DOI: 10.11944/j.issn.1000-0518.2015.04.140292

• 研究论文 • 上一篇    下一篇

盐酸中1-苯胺甲基苯并咪唑对碳钢的缓蚀行为

苏铁军a*, 李克华b, 罗运柏c   

  1. a长江大 学工程技术学院 湖北 荆州 434020
    b长江大学 化学与环境工程学院 湖北 荆州 434020
    c武汉大学化学与分子科学学院 武汉 430072
  • 收稿日期:2014-08-25 出版日期:2015-04-10 发布日期:2015-04-10
  • 通讯作者: 苏铁军,讲师; Tel:0716-8067596; E-mail:sutj@qq.com; 研究方向:油田化学和金属腐蚀防护
  • 基金资助:
     

Inhibition Behavior of 1-Phenylaminomethylbenzimidazole for Mild Steel in Hydrochloric Acid

SU Tiejuna, *, LI Kehuab, LUO Yunbaic   

  1. aCollege of Technology and Engineering
    bCollege of Chemistry and Environmental engineering, Yangtze University,Jingzhou,Hubei 434020,China
    cCollege of Chemistry and Molecular Sciences,Wuhan University,Wuhan 430072,China
  • Received:2014-08-25 Published:2015-04-10 Online:2015-04-10
  • Contact: Corresponding author:SU Tiejun, lecturer; Tel:0716-8067596; E-mail:sutj@qq.com; Research interests:oilfield chemistry and protection of metal corrosion
  • Supported by:

    Supported by Yangtze University College of Technology and Engineering Innovation Foundation(13J0603)

摘要:

采用静态失重、动电位极化、交流阻抗等技术方法研究了1-苯胺甲基苯并咪唑(PAB)对盐酸介质中N80钢的缓蚀性能,并讨论了PAB在N80钢表面的吸附行为。 结果表明,缓蚀率随着PAB浓度增大而升高,随着温度升高而下降。 极化曲线测试表明PAB是一种混合控制型缓蚀剂。 PAB在N80钢表面的吸附是一个自发、放热、熵增的过程,其行为符合Langmuir吸附等温式。 同时采用量子化学方法对PAB的缓蚀机理做了进一步分析。

 

关键词: 缓蚀剂, 失重法, 动电位极化, 阻抗, 量子化学计算

Abstract:

The inhibition effect and adsorption behavior of 1-phenylaminomethylbenzimidazole (PAB) for N80 steel in HCl solution were investigated by mass-loss test, potentiodynamic polarization and electrochemical impedance spectroscopy (EIS). The inhibition efficiency increased with higher concentration of PAB and decreased with elevated temperature. Polarization curve reveals that PAB is a mix-type inhibitor. The adsorption between PAB and N80 steel surface is a spontaneous, exothermic and entropy increasing process fitting Langmuir isotherm. The relationship between the molecular structure of PAB and the inhibition efficiency was investigated using quantum chemical calculations.

Key words: corrosion inhibitor, mass loss, potentiodynamic polarization, impedance, quantum chemistry calculation

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