Hydrodynamic Effects on the CO2 Corrosion Inhibition of X-20 Pipeline Steel by Carboxyethyl-imidazoline
Por:
Ortega-Toledo D.M., Gonzalez-Rodriguez J.G., Casales M., Caceres A., Martinez L.
Publicada:
1 mar 2011
Categoría:
Electrochemistry
Resumen:
The effect of flow conditions on the performance of carboxyethylimidazoline as CO2-corrosion inhibitor for API X-120 pipeline steel has been evaluated by using electrochemical techniques. Techniques includes polarization curves, linear polarization resistance, electrochemical impedance spectroscopy and electrochemical noise measurements, whereas the rotation speed were 0, 250, 500, 1000 and 2500 rpm. Different techniques show that for uninhibited solution, the corrosion rate increases with an increase in the rotating speed, but for the inhibited solution, the lowest corrosion rate is obtained at 1000 rpm, but it increases with a further increase in the rotating speed. Electrochemical noise measurements shows that in absence of inhibitor, the steel is susceptible to uniform corrosion, whereas when the inhibitor is present, the steel is highly susceptible to localized type of corrosion.
Filiaciones:
Ortega-Toledo D.M.:
Centro de Investigacion en Materiales Avanzados, Miguel de Cervantes 120, Chih., Mexico
Gonzalez-Rodriguez J.G.:
U.A.E.M.-C.I.I.C.Ap, Av. Universidad 1001, 6225-Cuernavaca, Mor., Mexico
Casales M.:
Univ Nacl Autonoma Mexico, Inst Ciencias Fis, Cuernavaca 6225, Morelos, Mexico
Caceres A.:
Univ Nacl Autonoma Mexico, Fac Quim, Dept Ingn Quim Met, Mexico City 04510, DF, Mexico
Martinez L.:
Univ Nacl Autonoma Mexico, Inst Ciencias Fis, Cuernavaca 6225, Morelos, Mexico
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