Pais, Mikitha and Shwetha, N and Padmalatha, * (2021) Experimental and Theoretical Evaluation of Efficacy of Inhibitory Action of Benzyl Isothiocyanate. Protection of Metals and Physical Chemistry of Surfaces, 57 (3). pp. 597-607. ISSN 2070-2051

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Abstract

Benzyl isothiocyanate (BITC) was used as anticorrosive agent for the corrosion mitigation of stain�less steel in 0.5 M hydrochloric acid medium. The corrosion inhibition study of (BITC) was investigated by potentiodynamic polarization (PDP) and electrochemical impedance spectroscopy (EIS) techniques in the temperature range of 303–323 K. The study was done to get optimum inhibition efficiency. The surface mor�phology was studied using scanning electron microscopy (SEM). Elemental mapping was done by energy dis�persive X-ray (EDX) studies. Suitable mechanism was proposed for corrosion and inhibition process. Quan�tum chemical calculations were done and discussed in detail using density functional theory (DFT). Maxi�mum inhibition efficiency of 86% was achieved for the addition of 0.025 g L−1 of the inhibitor at 308 K. BITC acted as mixed inhibitor and obeyed Langmuir adsorption. Surface morphology studies reaffirmed the adsorption of BITC onto the surface of steel. Quantum chemical calculations supported experimental obser�vations

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