盐酸中1-苯胺甲基苯并咪唑对碳钢的缓蚀行为

doi:10.11944/j.issn.1000-0518.2015.04.140292

摘要/Abstract

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

中图分类号:

O646
TG174.4

苏铁军, 李克华, 罗运柏. 盐酸中1-苯胺甲基苯并咪唑对碳钢的缓蚀行为[J]. 应用化学, 2015, 32(4): 464-471.

SU Tiejuna, , LI Kehuab, LUO Yunbaic. Inhibition Behavior of 1-Phenylaminomethylbenzimidazole for Mild Steel in Hydrochloric Acid[J]. Chinese Journal of Applied Chemistry, 2015, 32(4): 464-471.

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