Original scientific paper

https://doi.org/10.5599/jese.2012.0013

Corrosion inhibition of carbon steel by extract of Buddleia perfoliata

Roy Lopes-Sesenes ; Universidad Autonoma del Estado de Morelos, CIICAP, Mexico
Jose Gonzalo Gonzalez-Rodruguez ; Universidad Autonoma del Estado de Morelos, CIICAP, Mexico
Gloria Francisca Dominguez-Patino ; Uni­versidad Autonoma del Estado de Morelos, Facultad de Ciencias Biologicas, Mexico
Alberto Marinez-Villafane ; Centro de Investigaciones en Materiales Avanzados, Chihuahua, Mexico

Abstract

Buddleia perfoliata leaves extract has been investigated as a carbon steel corrosion inhibitor in 0.5 M sulfuric acid by using polarization curves, electrochemical impedance spectroscopy and weight-loss tests at different concentrations (0, 100, 200, 300, 400 and 500 ppm) and temperatures, namely 25, 40 and 60 °C. Results showthat inhibition efficiency increases as the inhibitor concentration increases, decreases with temperature, and reaches a maximum value after 12 h of exposure, decreasing with a further increase in the exposure time. It was found that the inhibitory effect is due to the presence of tannines on this extract.

Keywords

Corrosion inhibitor; Buddleia perfoliata; EIS; polarization curves

Hrčak ID:

86992

URI

https://hrcak.srce.hr/86992

Publication date:

18.6.2012.

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