Abstract
This research explores the validity of Langmuir adsorption theorem in analyzing the natural corrosion inhibition by an aromatic C10H12 compound, in a hydrocarbon fuel, in 1-bar CO2-saturated solutions. The adsorption isotherms were constructed from the efficiencies of inhibition, by 10, 20, and 30 vol pct of the fuel, of the corrosion rates calculated from potentiodynamic polarization measurements, in 2 NaCl g/L solutions at 293 K, 323 K, and 353 K (20 °C, 50 °C, and 80 °C). The corrosion rates increased with temperature, and the hydrocarbon fuel, seemingly showing cathodic-inhibition characteristics, acted less efficiently accordingly; two main results the potentiodynamic polarization, electrochemical impedance spectroscopy and open-circuit measurements, demonstrated agreement on with each other.
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Acknowledgment
This research was made possible by NPRP Grant #09-211-2-089 from the Qatar National Research Fund (a member of Qatar Foundation).
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Manuscript submitted March 12, 2012.
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Eliyan, F.F., Alfantazi, A. Adsorption of Oil onto API-X100 Pipeline Steel in CO2-Saturated Solutions. Metall Mater Trans B 44, 1598–1604 (2013). https://doi.org/10.1007/s11663-013-9912-y
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DOI: https://doi.org/10.1007/s11663-013-9912-y