Corrosion inhibition effect of non-toxic �-aminoacid compound on high carbon steel in low molarconcentration of hydrochloric acid

Loto, R. T. (2017) Corrosion inhibition effect of non-toxic �-aminoacid compound on high carbon steel in low molarconcentration of hydrochloric acid. Journal of Materials Research and Technology.

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Abstract

Electrochemical studies of the corrosion inhibition effect of biodegradable 2-amino-4-methylpentanoic acid (LCN) on high carbon steel in 1 M HCl acid was evaluated withpotentiodynamic polarization technique, weight loss analysis and optical microscopy.Results show the compound to be highly effective with optimal inhibition efficienciesof 87.46% and 85.88% from the electrochemical test with dominant cathodic inhibitionbehaviour between 0% and 1.88% inhibitor concentration and anodic inhibition behaviourat 2.81% and 5.63% inhibitor concentration due to changes in the effect of lateral repulsionbetween inhibitor molecules. Thermodynamic calculations showed chemisorption molec-ular interaction and adsorption onto HCS surface according to Langmuir, Freundlich andFrumkin isotherm models with correlation coefficients of 0.9991, 0.8727 and 0.9782. Sta-tistical analysis showed inhibitor concentration is only relevant variable responsible forinhibition efficiency. Calculated results from predicted corrosion rate values varied at anaverage value of 53% from experimental results. Optical microscopy images of LCN inhibitedand uninhibited HCS samples significantly contrast each.

Item Type:	Article
Uncontrolled Keywords:	Corrosion, Steel, HCl, Adsorption, Inhibitor
Subjects:	T Technology > T Technology (General) T Technology > TJ Mechanical engineering and machinery
Divisions:	Faculty of Engineering, Science and Mathematics > School of Engineering Sciences
Depositing User:	Mrs Patricia Nwokealisi
Date Deposited:	30 Dec 2017 15:56
Last Modified:	30 Dec 2017 15:56
URI:	http://eprints.covenantuniversity.edu.ng/id/eprint/9880

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