Статья

Coco Monoethanolamide Surfactant as a Sustainable Corrosion Inhibitor for Mild Steel: Theoretical and Experimental Investigations

Richika GanjooDepartment of Chemistry, School of Chemical Engineering and Physical Sciences, Lovely Professional University, Phagwara 144402, IndiaShveta SharmaDepartment of Chemistry, School of Chemical Engineering and Physical Sciences, Lovely Professional University, Phagwara 144402, IndiaPraveen Kumar SharmaDepartment of Chemistry, School of Chemical Engineering and Physical Sciences, Lovely Professional University, Phagwara 144402, IndiaOmar DagdagCentre for Materials Science, College of Science, Engineering and Technology, University of South Africa, Johannesburg 1710, South AfricaАвни БеришаDepartment of Chemistry, Faculty of Natural and Mathematics Science, University of Prishtina, 10000 Prishtina, KosovoEno E. EbensoCentre for Materials Science, College of Science, Engineering and Technology, University of South Africa, Johannesburg 1710, South AfricaAshish KumarChandrabhan VermaInterdisciplinary Research Center for Advanced Materials, King Fahd University of Petroleum and Minerals, Dhahran 31261, Saudi Arabia

2023en

ABI

Аннотация

Recent studies indicate that surfactants are a relatively new and effective class of corrosion inhibitors that almost entirely meet the criteria for a chemical to be used as an aqueous phase corrosion inhibitor. They possess the ideal hydrophilicity to hydrophobicity ratio, which is crucial for effective interfacial interactions. In this study, a coconut-based non-ionic surfactant, namely, coco monoethanolamide (CMEA), was investigated for corrosion inhibition behaviour against mild steel (MS) in 1 M HCl employing the experimental and computational techniques. The surface morphology was studied employing the scanning electron microscope (SEM), atomic force microscope (AFM), and contact measurements. The critical micelle concentration (CMC) was evaluated to be 0.556 mM and the surface tension corresponding to the CMC was 65.28 mN/m. CMEA manifests the best inhibition efficiency (η%) of 99.01% at 0.6163 mM (at 60 °C). CMEA performs as a mixed-type inhibitor and its adsorption at the MS/1 M HCl interface followed the Langmuir isotherm. The theoretical findings from density functional theory (DFT), Monte Carlo (MC), and molecular dynamics (MD) simulations accorded with the experimental findings. The MC simulation's assessment of CMEA's high adsorption energy (-185 Kcal/mol) proved that the CMEA efficiently and spontaneously adsorbs at the interface.

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Идентификаторы

DOI: 10.3390/molecules28041581

Цитирования и источники

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