盐酸中1-苯胺甲基苯并咪唑对碳钢的缓蚀行为  

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

作　　者：苏铁军[1] 李克华[2] 罗运柏[3] 

机构地区：[1]长江大学工程技术学院,湖北荆州434020 [2]长江大学化学与环境工程学院,湖北荆州434020 [3]武汉大学化学与分子科学学院,武汉430072

出　　处：《应用化学》2015年第4期464-471,共8页Chinese Journal of Applied Chemistry

基　　金：长江大学工程技术学院科技创新基金(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。The inhibition effect and adsorption behavior of 1-phenylaminomethylbenzimidazole （PAB） for N80 steel in HCl solution were investigated by mass-loss test, impedance spectroscopy （ EIS ）. The inhibition efficiency potentiodynamic polarization and electrochemical 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.

关 键 词：缓蚀剂 失重法 动电位极化 阻抗 量子化学计算 

分 类 号：O646[理学—物理化学] TG174.4[理学—化学]