Comparative study on two imidazolium‐based ionic liquid surfactants as corrosion inhibitors for N80 steel in 15% hydrochloric acid solution,Materials and Corrosion

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Comparative study on two imidazolium‐based ionic liquid surfactants as corrosion inhibitors for N80 steel in 15% hydrochloric acid solution
Materials and Corrosion ( IF 1.6 ) Pub Date : 2020-06-08 , DOI: 10.1002/maco.202011775
Kangquan Qiao _{1,

2} , Ying Zeng ₁

Affiliation

A comparative study on 1‐dodecyl‐2,3‐dimethylimidazolium chloride ([DDMIM]Cl) and 1‐benzyl‐3‐dodecyl‐2‐methylimidazol‐1‐ium chloride ([BDMIM]Cl) as corrosion inhibitors for N80 steel in a 15% hydrochloric acid solution was performed by surface tension tests, electrochemical measurements, weight loss, scanning electron microscopy, atomic force microscopy, and theoretical calculations. The experimental results confirm that [DDMIM]Cl and [BDMIM]Cl act as mixed‐type inhibitors. The adsorption of both inhibitors on the N80 steel surface obeys the Langmuir adsorption isotherm, and [BDMIM]Cl exhibits better inhibitive performance, lower critical micelle concentration (CMC), and a lower ratio of saturation adsorption concentration on the steel surface to its own CMC than [DDMIM]Cl. The results of theoretical calculations reveal that the electron‐donating/accepting capacities and hydrophobicity of the benzyl substituent in the imidazole ring are essential for preventing steel corrosion in acid media.

中文翻译：

两种咪唑鎓离子液体表面活性剂作为N80钢在15％盐酸溶液中的腐蚀抑制剂的比较研究

用作N80钢缓蚀剂的1-十二烷基2,3-二甲基咪唑鎓氯化物（[DDMIM] Cl）和1-苄基-3-十二烷基-2-甲基咪唑-1-氯化铵（[BDMIM] Cl）作为缓蚀剂的比较研究通过表面张力测试，电化学测量，重量损失，扫描电子显微镜，原子力显微镜和理论计算来执行15％的盐酸溶液。实验结果证实[DDMIM] Cl和[BDMIM] Cl是混合型抑制剂。两种抑制剂在N80钢表面上的吸附均符合Langmuir吸附等温线，并且[BDMIM] Cl表现出更好的抑制性能，较低的临界胶束浓度（CMC）和较低的饱和吸附浓度与自身CMC之比。比[DDMIM] Cl多。

更新日期：2020-06-08

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