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Crude Glycerol as an Innovative Corrosion Inhibitor

Industrial Systems Engineering, Faculty of Engineering and Applied Science, University of Regina, 3737 Wascana Parkway, Regina, SK S4S 0A2, Canada
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Appl. Syst. Innov. 2018, 1(2), 12; https://doi.org/10.3390/asi1020012
Received: 12 February 2018 / Revised: 25 April 2018 / Accepted: 25 April 2018 / Published: 29 April 2018
Crude glycerol, a byproduct of biodiesel production, was evaluated as a potential green inhibitor for steel corrosion in an acidic environment. The study was conducted using steel specimens placed in hydrochloric acid solutions (0.5 M) at a constant room temperature (25 °C) and crude glycerol concentrations in the range 0.1%–1.0% w/w. The criteria used to evaluate the extent of corrosion were the weight loss and corrosion rate. Additionally, fresh and spent samples were characterized using scanning electron microscopy and potentiodynamic polarization measurements. It was found that, generally, the corrosion inhibition increased with the inhibitor concentration. Results also showed that the maximum inhibition efficiency was achieved at 70 h residence time after which the inhibition efficiency at a given concentration either remained unchanged or dropped slight. Additionally, the overall maximum inhibition efficiency (98%) was observed at 70 h residence time and a 1% inhibitor concentration. View Full-Text
Keywords: green inhibitor; corrosion; crude glycerol; adsorption isotherms; acidic medium green inhibitor; corrosion; crude glycerol; adsorption isotherms; acidic medium
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Zubaidi, I.A.; Jones, R.; Alzughaibi, M.; Albayyadhi, M.; Darzi, F.; Ibrahim, H. Crude Glycerol as an Innovative Corrosion Inhibitor. Appl. Syst. Innov. 2018, 1, 12.

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