Corrosion inhibition effect and adsorption behaviour of nicotinamide derivatives on mild steel in hydrochloric acid solution

Chakravarthy, M. P. and Mohana, K. N. and Pradeep Kumar, C. B. (2014) Corrosion inhibition effect and adsorption behaviour of nicotinamide derivatives on mild steel in hydrochloric acid solution. International Journal of Industrial Chemistry, 5 (9). pp. 1-21. ISSN 2228-5547

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Abstract

Background: A new class of nicotinamide derivatives viz., N-((1H-pyrrol-2-yl)methylene)nicotinamide, N-((methyl(phenyl)amino)methylene)nicotinamide, N-nicotinoylbenzimidothioic acid and N-(4-(methylthio)benzylidene)nicotinamide have been synthesized and their corrosion inhibition effect on mild steel in 0.5 M HCl was investigated by mass loss, Tafel polarization technique and AC impedance measurements. Results: The inhibition efficiency of the inhibitors on mild steel in 0.5 M HCl has been studied based on concentration, time interval and temperature. Potentiodynamic polarization studies showed that all the examined inhibitors suppress both anodic and cathodic process and behave as mixed type of corrosion inhibitors. Conclusions: The adsorption of all the inhibitors was found to obey Langmuir isotherm model. Electrochemical impedance data revealed that polarization resistance (RP) increases and double layer capacitance (Cdl) decreases as the concentration of the inhibitors increases. FTIR, EDX and SEM analyses were performed to study the film persistency of the inhibitors.

Item Type:	Article
Uncontrolled Keywords:	Chlorine compounds, Polarization, Adsorption, Electrochemical corrosion, Electrochemical electrodes, Electrochemical techniques, Isotherms, Low carbon steel, Steel corrosion, Thermodynamic properties, AC impedance measurement, Corrosion inhibition, Corrosion inhibitors, Electrochemical impedance, Hydrochloric acid solution, Nicotinamide derivatives, Polarization resistances, Potentiodynamic polarization studies
Subjects:	C Chemical Science > Chemistry
Divisions:	Department of > Chemistry
Depositing User:	Arshiya Kousar Library Assistant
Date Deposited:	18 Jun 2019 06:02
Last Modified:	18 Jun 2019 06:02
URI:	http://eprints.uni-mysore.ac.in/id/eprint/3173

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