Ethanolic extract of Ruta chalepensis as an eco-friendly inhibitor of acid corrosion of steel

Ethanolic extract of Ruta chalepensis as an eco-friendly inhibitor of acid corrosion of steel Ruta chalepensis extract (Ruta) was tested as a corrosion inhibitor for steel in 1 M HCl. Weight loss measurements, potentiodynamic polarization, and electrochemical impedance spectroscopy (EIS) were used. The inhibiting action increases with increasing concentration of the tested inhibitor. Efficiency is highest, 87 %, for 3.5 g/L Ruta extract. It acts on the cathodic domain without modifying the reduction mechanism. We note good agreement between gravimetric and electrochemical methods (potentiodynamic polarisation and EIS). Polarization measurements also show that Ruta extract is a good mixed inhibitor. The effect of temperature on the corrosion behaviour of steel in 1 M HCl was also studied in the temperature range 298–338 K. Thermodynamic data for activation were determined. Ruta extract is adsorbed on the steel surface in accordance with a Temkin adsorption model. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Research on Chemical Intermediates Springer Journals

Ethanolic extract of Ruta chalepensis as an eco-friendly inhibitor of acid corrosion of steel

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Publisher
Springer Netherlands
Copyright
Copyright © 2012 by Springer Science+Business Media Dordrecht
Subject
Chemistry; Catalysis; Physical Chemistry; Inorganic Chemistry
ISSN
0922-6168
eISSN
1568-5675
D.O.I.
10.1007/s11164-012-0910-5
Publisher site
See Article on Publisher Site

Abstract

Ruta chalepensis extract (Ruta) was tested as a corrosion inhibitor for steel in 1 M HCl. Weight loss measurements, potentiodynamic polarization, and electrochemical impedance spectroscopy (EIS) were used. The inhibiting action increases with increasing concentration of the tested inhibitor. Efficiency is highest, 87 %, for 3.5 g/L Ruta extract. It acts on the cathodic domain without modifying the reduction mechanism. We note good agreement between gravimetric and electrochemical methods (potentiodynamic polarisation and EIS). Polarization measurements also show that Ruta extract is a good mixed inhibitor. The effect of temperature on the corrosion behaviour of steel in 1 M HCl was also studied in the temperature range 298–338 K. Thermodynamic data for activation were determined. Ruta extract is adsorbed on the steel surface in accordance with a Temkin adsorption model.

Journal

Research on Chemical IntermediatesSpringer Journals

Published: Nov 16, 2012

References

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