Anticorrosive property of Spiraea Cantoniensisis extract as an eco-friendly inhibitor on mild steel surface in acid medium |
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Authors: | Ill-Min Chung Kathirvel Kalaiselvi Asokan Sasireka Seung-Hyun Kim |
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Affiliation: | 1. Department of Crop Science, College of Sanghur Life Science, Konkuk University, Seoul, South Korea;2. Department of Chemistry, PSGR Krishnammal College for Women, Coimbatore, Tamil Nadu, India;3. Advanced Materials Research Laboratory, Department of Chemistry, Periyar University, Salem, Tamil Nadu, India |
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Abstract: | AbstractThe inhibitive performance of methanolic extract of eco-friendly green inhibitor Spiraea cantoniensis (S. cantoniensis) on inhibiting corrosion of mild steel (MS) in 1?M HCl was studied by weight loss, AC-impedance, Fourier transform infrared spectroscopy (FT-IR), Raman, x-ray diffraction (XRD), ultraviolet-visible (UV-Vis), atomic absorption spectroscopy (AAS), and scanning electron microscopy (SEM) analysis. The results showed that the corrosion rate significantly decreased in the presence of the S. cantoniensis inhibitor with a gradual increase in inhibition efficiency at an increased inhibitor concentration. The temperature studies were conducted which included activation energy (Ea), change in enthalpy (ΔH°ads), change in entropy (ΔS°ads), change in free energy (ΔG°ads) and heat of adsorption (Qads). These calculations were helpful to determine the reaction mechanism and proved it as a physisorption type following the Langmuir adsorption isotherm. The analysis of the protective film using FT-IR, Raman, XRD, and SEM analysis clearly showed the potentiality of S. cantoniensis in blocking the MS surface to prevent corrosion by 1?M HCl. The solution analysis via AAS and UV-Vis showed the inhibitive effect of the inhibitor (S. cantoniensis) in both inhibitive and the uninhibitive solution exhibiting the adsorption of the phytochemical molecules on the MS surface. |
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Keywords: | Spiraea cantoniensis electrochemical XRD Raman SEM |
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