Electrochemical and quantum chemical study to assess the role of (2E)-2-(furan-2-ylmethylidene) hydrazine carbothioamide as inhibitor for acid corrosion of mild steel

被引：9

作者：

Adinarayanan, V. R. ^{[1
]}

Kumari, P. Preethi ^{[1
]}

Rao, Suma A. ^{[1
]}

机构：

[1] Manipal Acad Higher Educ, Manipal Inst Technol, Dept Chem, Manipal 576104, India

来源：

JOURNAL OF APPLIED ELECTROCHEMISTRY | 2022年 / 52卷 / 03期

关键词：

Mild steel; Hydrazine carbothioamide; Physisorption; Adsorption; Surface morphology; Density functional theory; CARBON-STEEL; ADSORPTION BEHAVIOR; SULFURIC-ACID; DERIVATIVES; HCL; THIOSEMICARBAZIDE; SURFACE; IRON;

D O I：

10.1007/s10800-021-01656-9

中图分类号：

O646 [电化学、电解、磁化学];

学科分类号：

081704 ;

摘要：

Synthesis and inhibition effectiveness of (2E)-2-(furan-2-ylmethylidene) hydrazine carbothioamide (FMHC) as an inhibitor for corrosion of mild steel in 0.5 M H2SO4 is reported. Experiments were conducted at various temperatures (303-323 K) by adopting potentiodynamic polarization and electrochemical impedance spectroscopy. Readings obtained demonstrated that percentage inhibition efficiency (% IE) improved with the upsurge in the concentration of FMHC, while it decreased with a rise in temperature. The highest % IE observed was 60% for 2.5 x 10(-4) M FMHC at 303 K. FMHC worked moderately as a mixed inhibitor. FMHC obeyed the Langmuir model of adsorption and the mode of adsorption was physisorption on the mild steel surface which was further endorsed by examining the surface using the scanning electron microscope. A clear insight into the mechanistic features of corrosion inhibition by using FMHC was acquired. Calculation of activation parameters helped to suggest an appropriate mechanism for the adsorption of FMHC on mild steel through quantum chemical calculations using density functional theory (DFT).

引用

页码：627 / 638

页数：12

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