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Title: | Β-SITOSTEROL ISOLATED FROM RICE HULLS AS AN EFFICIENT CORROSION INHIBITOR FOR MILD STEEL IN ACIDIC ENVIRONMENTS |
Authors: | Mayakrishnan, Prabakaran Seung-Hyun, Kim Asokan, Sasireka Venkatesan, Hemapriya Ill-Min, Chung |
Issue Date: | 5-Apr-2017 |
Publisher: | Royal Society of Chemistry |
Abstract: | β-Sitosterol has an inhibiting effect on the corrosion of mild steel. We investigated this effect in a H2SO4 solution using β-sitosterol-3-O-β-D-glucoside (β-sitosterol) isolated from rice hulls. Proton nuclear magnetic resonance, UV-visible spectroscopy, FT-IR spectroscopy, weight loss measurements, electrochemical studies, and atomic absorption spectroscopy were used to examine the inhibition of β-sitosterol on mild steel corrosion in a 1 M H2SO4 solution. The effect of temperature on the corrosion behavior of mild steel was examined in the range of 303–333 ± 1 K. The inhibition efficiency increased with increasing inhibitor concentration and decreased with increasing temperature. Electrochemical studies indicated that isolated β-sitosterol acted as a good corrosion inhibitor. The surface morphologies of the mild steel specimens were analyzed by scanning electron microscopy. The maximum inhibition efficiency of β-sitosterol (500 ppm) was 95%. The surface morphology was identified using scanning electron microscopy/energy-dispersive X-ray spectroscopy (SEM-EDS), and atomic force microscopy (AFM). |
URI: | https://doi.org/10.1039/C6NJ03760G |
Appears in Collections: | 2.Article (26) |
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Β-SITOSTEROL ISOLATED FROM RICE HULLS AS AN EFFICIENT CORROSION INHIBITOR FOR MILD STEEL IN ACIDIC ENVIRONMENTS.docx | 192.16 kB | Microsoft Word XML | View/Open |
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