Abstract
The aerial parts extract of Momordica charantia plant were used for the corrosion resistance of carbon steel in the acidic medium (0.5 M H2SO4) utilizing weight loss method, Tafel and Electrochemical Impedance Spectroscopy. The state of mixed inhibitor adsorption on the carbon steel surface is shown by potentiodynamic polarization. M. charantia achieved the extraordinary inhibition efficiency of 93.51% at 500 mg/L of inhibitor concentration. Scanning electron microscopy and atomic force microscopy were used to know about the thin layer which was formed on the surface of carbon steel for its protection from corrosion and the adsorption of inhibitor was shown by UV–vis. spectroscopic technique. Fourier Transform Infrared Spectroscopy technique confirmed the existence of functional groups and the heteroatoms exhibit in the inhibitor. Adsorbance by the inhibitory molecules on the carbon steel surface followed the Langmuir adsorption isotherm. Hypothetical investigations (computational) showed a very valuable report. All acquired outcomes ensure that M. charantia extract can procedure an effectual preventing layer and restrict the corrosion procedure.
Highlights
Carbon steel is an alloy which can be found and have a lot of mechanical properties in its development, industrial process and its production [1]
The carbon steel specimens were abraded by uniquegrades of emery papers rinsed through distilled water and acetone The sulfuric acid solution was mitigated to 0.5 M H2SO4 for use as an aggressive media
To decide the impact of resistance of M. charantia on the carbon steel surface with the presence of 0.5 M sulfuric acid, it is essential to compute the consequences of this test and associate them with the chemical, electronic and structural properties of the inhibitor particles [44]
Summary
Carbon steel is an alloy which can be found and have a lot of mechanical properties in its development, industrial process and its production [1]. Green inhibitors adsorbed on the metal surface using π-electronic systems, and S, P, N, O [4]. The idea of the dealing of adsorbed particles on the carbon steel surface is evaluated utilizing adsorption and thermodynamic models. Genuine alloys and metals respond chemically or electrochemically with the destructive media to make a steady compost where metal misfortune happens [7] The manure in this manner made is known as a corrosion product, and the metal surface becomes rusts. M. charantia generally grows up to 5 m (16 ft) This herb bears simple, alternate leaves 4–12 cm across, with 3–7 deeply separated lobes. It belongs to the Cucurbitaceae family and known as Bitter gourd, Bitter melon, Bitter squash, and Karela. Toward confirm the experimental results, quantum parameters were generated per the density functional theory (DFT) method
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