Electrochemical and Quantum Chemical Studies of Azoles as Corrosion Inhibitors for Mild Steel in Hydrochloric Acid

被引：22
|
作者：
Zhang Weiwei [1 ]
Ma Rui [1 ]
Li Shuai [1 ]
Liu Yu [1 ]
Niu Lin [1 ]
机构：
[1] Shandong Univ, Sch Chem & Chem Engn, Key Lab Colloid & Interface Chem, Minist Educ, Jinan 250100, Peoples R China
来源：
CHEMICAL RESEARCH IN CHINESE UNIVERSITIES | 2016年 / 32卷 / 05期
基金：
中国国家自然科学基金;
关键词：
Mild steel; Corrosion inhibition; Polarization; Electrochemical impedance spectroscopy(EIS); Scanning electron microscopy(SEM); Quantum chemical study; BENZIMIDAZOLE DERIVATIVES; TRIAZOLE DERIVATIVES; ADSORPTION; EXTRACT; SEM;
D O I：
10.1007/s40242-016-6084-8
中图分类号：
O6 [化学];
学科分类号：
0703 ;
摘要：
The inhibition effect of three azole compounds, 2-aminobenzimidazole(ABM), 2-aminothiazole(AT) and 2-aminobenzothiazole(ABT), on the corrosion of mild steel in a 1 mol/L HCl solution was investigated by means of potentiodynamic polarization measurement, electrochemical impedance spectroscopy(EIS) and scanning electron microscopy(SEM). The correlation between inhibition efficiency and molecular structure of inhibitor was theoretically studied via quantum chemical calculations. The results show that the inhibition efficiency(eta) of the inhibitors follows the order of eta(ABT)>eta(AT)>eta(ABM). Moreover, ABM, AT and ABT belong to mixed-type inhibitors. The adsorption of the inhibitors on the steel surface follows the Langmuir adsorption isotherm, with both physisorption and chemisorption.
引用
收藏
页码：827 / 837
页数：11
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