N-methyl-2-(2-nitrobenzylidene) hydrazine carbothioamide—A new corrosion inhibitor for mild steel in 1 mol·L-1 hydrochloric acid

doi:10.1016/j.cjche.2015.08.004

Chinese Journal of Chemical Engineering ›› 2015, Vol. 23 ›› Issue (11): 1916-1922.DOI: 10.1016/j.cjche.2015.08.004

N-methyl-2-(2-nitrobenzylidene) hydrazine carbothioamide—A new corrosion inhibitor for mild steel in 1 mol·L^-1 hydrochloric acid

K. Krishnaveni¹, K. Sampath², J. Ravichandran¹, C. Jayabalakrishnan¹

1 Research Department of Chemistry, Sri Ramakrishna Mission Vidyalaya College of Arts and Science, Coimbatore 641020, Tamilnadu, India;
2 Department of Chemistry, Kumaraguru College of Technology, Coimbatore 641049, Tamilnadu, India

收稿日期:2014-07-10 修回日期:2015-06-21 出版日期:2015-11-28 发布日期:2015-12-18
通讯作者: J. Ravichandran

N-methyl-2-(2-nitrobenzylidene) hydrazine carbothioamide—A new corrosion inhibitor for mild steel in 1 mol·L^-1 hydrochloric acid

K. Krishnaveni¹, K. Sampath², J. Ravichandran¹, C. Jayabalakrishnan¹

1 Research Department of Chemistry, Sri Ramakrishna Mission Vidyalaya College of Arts and Science, Coimbatore 641020, Tamilnadu, India;
2 Department of Chemistry, Kumaraguru College of Technology, Coimbatore 641049, Tamilnadu, India

Received:2014-07-10 Revised:2015-06-21 Online:2015-11-28 Published:2015-12-18
Contact: J. Ravichandran

摘要/Abstract

摘要： The corrosion inhibition of mild steel in 1 mol·L^-1 hydrochloric acid by N-methyl-2-(2-nitrobenzylidene) hydrazine carbothioamide (MNBHC)was studied usingweight loss and electrochemical studies. Results obtained indicate that the inhibitor is effective in hydrochloric acid medium and the efficiency decreases with increase in temperature. Added halide additives improve the efficiency of the inhibitor. The AC impedance studies reveal that the process of inhibition is through charge transfer. Polarization studies indicate the mixed nature of the inhibitor. Fromthe thermodynamic, spectral and surface analyses the nature of adsorption has been found out. The adsorption of the inhibitor on mild steel follows the Langmuir isotherm.

关键词: Mild steel, EIS, Mass loss, SEM, Acid corrosion

Abstract: The corrosion inhibition of mild steel in 1 mol·L^-1 hydrochloric acid by N-methyl-2-(2-nitrobenzylidene) hydrazine carbothioamide (MNBHC)was studied usingweight loss and electrochemical studies. Results obtained indicate that the inhibitor is effective in hydrochloric acid medium and the efficiency decreases with increase in temperature. Added halide additives improve the efficiency of the inhibitor. The AC impedance studies reveal that the process of inhibition is through charge transfer. Polarization studies indicate the mixed nature of the inhibitor. Fromthe thermodynamic, spectral and surface analyses the nature of adsorption has been found out. The adsorption of the inhibitor on mild steel follows the Langmuir isotherm.

Key words: Mild steel, EIS, Mass loss, SEM, Acid corrosion

K. Krishnaveni, K. Sampath, J. Ravichandran, C. Jayabalakrishnan. N-methyl-2-(2-nitrobenzylidene) hydrazine carbothioamide—A new corrosion inhibitor for mild steel in 1 mol·L^-1 hydrochloric acid[J]. Chinese Journal of Chemical Engineering, 2015, 23(11): 1916-1922.

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N-methyl-2-(2-nitrobenzylidene) hydrazine carbothioamide—A new corrosion inhibitor for mild steel in 1 mol·L^-1 hydrochloric acid

N-methyl-2-(2-nitrobenzylidene) hydrazine carbothioamide—A new corrosion inhibitor for mild steel in 1 mol·L^-1 hydrochloric acid

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