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Electrochemical studies of the corrosion inhibition of methionine ethyl ester on iron in citric-chloride solution

Published online by Cambridge University Press:  22 January 2003

M. Zerfaoui ,
H. Oudda ,
B. Hammouti ,
M. Benkaddour ,
S. Kertit ,
M. Zertoubi ,
M. Azzi  and
M. Taleb
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Abstract

The effect of methionine ethyl ester (MetOC2H5), a non-toxic compound on the corrosion of iron in citric-chloride solution at pH = 5, has been investigated by various corrosion monitoring techniques. Results obtained reveal that this compound is a very good inhibitor. Potentiodynamic polarization studies show that MetOC2H5 is a mixed-type inhibitor and that it acts on the cathodic reaction without changing the mechanism of hydrogen evolution. Variation in impedance parameters (Rt and Cdl) are indicative of adsorption of MetOC2H5 on the metal surface. The adsorption of this product on the iron surface obeys a Temkin adsorption isotherm. The effect of temperature indicates that inhibition efficiency of MetOC2H5 slightly changes with increasing temperature in the range of 30-60 °C.

Type
Research Article
Information
Metallurgical Research & Technology , Volume 99 , Issue 12: Présent et futur des matériaux frittés , December 2002 , pp. 1105 - 1110
Copyright
© La Revue de Métallurgie, 2002

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