Experimental and Quantum Studies on Adsorption and Corrosion Inhibition Effect on Mild Steel in Hydrochloric Acid by Thiophene Derivatives

查看全文 作　　者：[1]M.Yadav;Debasis [1]Behera;[1]R.R.Sinha;[2]P.N.Yadav

机构地区：[1]Department of Applied Chemistry,Indian School of Mines;[2]Department of Physics,Post Graduate College

出　　处：《Acta Metallurgica Sinica(English Letters)》索引2014年第27卷第1期,共10页

摘　　要：The inhibition effect of synthesized diethyl 3,4-bis(4-methoxybenzylideneamino) thieno[2,3-b]thiophene-2,5-dicarboxylate(Inh I) and diethyl 3,4-bis(benzylideneamino) thieno[2,3-b]thiophene-2,5-dicarboxylate(Inh Ⅱ),on corrosion of mild steel in 15%HC1 solution was investigated using weight loss measurements,electrochemical polarization,and electrochemical impedance spectroscopy techniques.The experimental results show that the inhibition efficiency of studied inhibitors increased with the increase of inhibitors concentration but decreased with the increase of temperature.Corrosion inhibition efficiencies of 94.5%and 92.1%were obtained with 250 ppm of Inh I and Inh Ⅱ at 303 K,respectively.The potentiodynamic polarization measurements indicate that the studied inhibitors act as mixed inhibitor.The thermodynamic parameters of the corrosion and adsorption processes were calculated and evaluated.The adsorption of these inhibitors was found to obey Langmuir adsorption isotherm.Scanning electron microscopy was used to characterize the surface morphology of the mild steel specimens in presence and absence of inhibitors.The mechanism of the inhibition process was discussed in the light of the chemical structure and quantum-chemical calculations of the investigated inhibitors. 关键词：量子化学计算噻吩衍生物吸附过程缓蚀作用实验低碳钢电化学阻抗光谱学 LANGMUIR

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Experimental and Quantum Studies on Adsorption and Corrosion Inhibition Effect on Mild Steel in Hydrochloric Acid by Thiophene Derivatives

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