Inhibition effects of 2,5-dimercapto-1,3,4-thiadiazole on the corrosion of mild steel in sulphuric acid solution

被引：80
|
作者：
Chen, Wen [1 ]
Luo, Hong Qun [1 ]
Li, Nian Bing [1 ]
机构：
[1] Southwest Univ, Sch Chem & Chem Engn, Key Lab Ecoenvironm Gorges Reservoir Reg 3, Minist Educ, Chongqing 400715, Peoples R China
来源：
CORROSION SCIENCE | 2011年 / 53卷 / 10期
关键词：
Mild steel; EIS; Polarization; Weight loss; Acid inhibition; COLD-ROLLED STEEL; LOW-CARBON STEEL; HYDROCHLORIC-ACID; THIADIAZOLE DERIVATIVES; SCHIFF-BASES; ADSORPTION; BEHAVIOR; EFFICIENCY; IMPEDANCE; MEDIA;
D O I：
10.1016/j.corsci.2011.06.013
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
The effect of 2,5-dimercapto-1,3,4-thiadiazole (DMTD) on the corrosion of mild steel (MS) in 1.0 M H2SO4 was investigated. DMTD acted as a mixed-type inhibitor without change of the mechanism of hydrogen evolution. The inhibition efficiency increased with the increase in concentration of DMTD but decreased with the increase of temperature. Adsorption of the inhibitor on the MS surface obeyed the Langmuir adsorption isotherm. The potential of zero charge suggests MS surface is positively charged in 1.0 M H2SO4. Thermodynamics and quantum chemical calculations reveal that the adsorption process of DMTD includes electrostatic interaction and electron donor-acceptor interactions. (C) 2011 Elsevier Ltd. All rights reserved.
引用
收藏
页码：3356 / 3365
页数：10
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