Isatin derivatives as a non-toxic corrosion inhibitor for mild steel in 20% H2SO4

被引：122
|
作者：
Ansari, K. R. [1 ]
Quraishi, M. A. [1 ]
Singh, Ambrish [2 ]
机构：
[1] Banaras Hindu Univ, Dept Chem, Indian Inst Technol, Varanasi 221005, Uttar Pradesh, India
[2] Lovely Profess Univ, Lovely Fac Technol & Sci, Dept Chem, Phagwara, India
来源：
CORROSION SCIENCE | 2015年 / 95卷
关键词：
Mild steel; EIS; Polarization; Acid corrosion; SCHIFF-BASE COMPOUNDS; 1 M HCL; HYDROCHLORIC-ACID; CARBON-STEEL; SULFURIC-ACID; ORGANIC-COMPOUNDS; MEDIA; BENZIMIDAZOLE; BENZOTRIAZOLE; THIADIAZOLES;
D O I：
10.1016/j.corsci.2015.02.010
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
The corrosion inhibition action of Isatin-beta-thiosemicarbzone derivatives namely 1-Benzylidene-5-(2-oxoindoline-3-ylidene) Thiocarbohydrazone (TZ-1) and 1-(4-Methylbenzylidene)-5-(2-oxoindolin-3-ylidene) Thiocarbohydrazone (TZ-2) was studied on mild steel surface in 20% H2SO4 by gravimetric measurements, Electrochemical measurements (EIS and Tafel), SEM, EDX and quantum chemical methods. Potentiodynamic polarization curves reveal that the TZs act as mixed type inhibitors exhibiting predominantly cathodic behavior. The adsorption of TZs obeys the Langmuir adsorption isotherm. The thermodynamic parameters (E-a, K-ads, Delta G degrees(ads)) were also computed and discussed. (C) 2015 Elsevier Ltd. All rights reserved.
引用
收藏
页码：62 / 70
页数：9
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