The efficiency of Laurus nobilis leaves’ extract as a corrosion inhibitor for mild steel in acidic medium (1 M H2SO4) was investigated by use of the electrochemical techniques potentiodynamic polarization, electrochemical impedance spectroscopy, and polarization resistance measurements. According to the experimental results, L. nobilis extract acts as a good corrosion inhibitor. In the presence of the inhibitor, corrosion potential shifted toward a more negative value than for the blank solution. Inhibitor efficiency increased with increasing inhibitor concentration, as expected. According to the potentiodynamic polarization results the corrosion of mild steel increased with increasing temperature both in the presence and absence of the inhibitor. The activation energy (E a) of the corrosion process was calculated from the variation of corrosion current density with temperature.
Research on Chemical Intermediates – Springer Journals
Published: Dec 20, 2011
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