A detailed atomic level computational and electrochemical exploration of the Juglans regia green fruit shell extract as a sustainable and highly efficient green corrosion inhibitor for mild steel in 3.5 wt% NaCl solution

In this study, for the first time, from both theoretical and experimental faces, the role of Juglans regia green fruit shell (JRS) extract as a sustainable potent corrosion inhibitor for mild steel was studied. The chemical structure of the JRS extract was deliberated by Fourier transform infrared spectroscopy (FT-IR). By electrochemical techniques including polarization, EIS and electrochemical current noise analyses, the corrosion inhibition performance of 1000 ppm JRS extract in the saline solution was examined. The surface characterization of the plates after 24 h immersion in the saline solution was done applying ATR-FTIR and FE-SEM-EDS analyses. The polarization test results illustrated that in the attendance of 1000 ppm JRS extract, both of cathodic and anodic reactions rates were noticeably retarded. Also, the corrosion inhibition efficiency of the mild steel plates reached ~ 94% in presence of 1000 ppm JRS extract. EIS results revealed that in the attendance of the JRS extract and with the immersion time progress up to 48 h, the inhibition capacity of inhibitor was promoted. The theoretical investigation results revealed the efficient adsorption of the organic components existed in the JRS extract on the surface of plates constructing a corrosion protecting barrier film.
Source: Journal of Molecular Liquids - Category: Molecular Biology Source Type: research