咪唑啉缓蚀剂在1 mol/L盐酸中对20#碳钢的缓蚀作用  

INHIBITION EFFECT OF IMIDAZOLINE INHIBITOR ON 20#CARBON STEEL IN 1 mol/L HYDROCHLORIC ACID

作　　者：王子恒 朱雨晴 余洪洋 程振锋 肖作安[1,2] 占丹 Wang Ziheng;Zhu Yuqing;Yu Hongyang;Cheng Zhenfeng;Xiao Zuoan;Zhan Dan(Hubei Key Laboratory of Power System Design and Test for Electrical Vehicle, Hubei University of Arts and Science, Xiangyang 441053, Hubei, China;School of Food Science and Technology & School of Chemical Engineering, Hubei University of Arts and Science, Xiangyang 441053, Hubei, China)

机构地区：[1]湖北文理学院纯电动汽车动力系统设计与测试湖北省重点实验室,湖北襄阳441053 [2]湖北文理学院食品科学技术学院·化学工程学院,湖北襄阳441053

出　　处：《精细石油化工》2021年第4期53-56,共4页Speciality Petrochemicals

基　　金：“机电汽车”湖北省优势特色学科群开放基金(XKQ2020027);中国石油和化学工业联合会科技指导计划项目(2019-09-01)。

摘　　要：采用腐蚀失重法评价了咪唑啉在1 mol/L盐酸中对20#碳钢的缓蚀性能。结果表明,缓蚀率随着缓蚀剂质量浓度的增加而增加。当缓蚀剂质量浓度达到60 mg/L时,缓蚀率随着咪唑啉的质量浓度增加变化不明显,其最大缓蚀率为97.5%。咪唑啉在20#碳钢的表面吸附是一个自发的放热过程,吸附过程符合朗格缪尔等温吸附,其吸附吉布斯自由能变化在-40~-20 kJ/mol,表明咪唑啉缓蚀剂在20#碳钢表面的吸附过程同时存在化学吸附和物理吸附。Imidazoline was investigated as a 20#carbon steel inhibiter in 1 mol/L HCl solution through weight loss measurement.The results show that the corrosion inhibition efficiency increases with the increase of the mass concentration of imidazoline,when the dosage reaches 60 mg/L,the corrosion inhibition efficiency does not change significantly with increasing concentration,and the maximum corrosion inhibition rate is 97.5%.The adsorption process of imidazoline on the surface of the 20#carbon steel is exothermic and spontaneous,which obeys a Langmuir adsorption isotherm with a Gibbs free energy change of adsorption between-40 kJ/mol and-20 kJ/mol.This reveales that the adsorption mechanism of imidazoline on the 20#carbon steel surface is a combination of chemical and physical adsorption.

关 键 词：咪唑啉 缓蚀性能 失重法 

分 类 号：TQ050.96[化学工程]