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Evaluation of N,N-Dimethylformamide as Corrosion Inhibitor on API 5L X70 using 3% NaCl

Published online by Cambridge University Press:  16 July 2019

Pablo Martínez Jiménez ,
Araceli Espinoza Vázquez  and
Francisco Javier Rodríguez Gómez
Pablo Martínez Jiménez
Affiliation:
Departamento de Ingeniería Metalúrgica, Facultad de Química, Universidad Nacional Autónoma de México, Ciudad de México, 04510, México
Araceli Espinoza Vázquez*
Affiliation:
Departamento de Ingeniería Metalúrgica, Facultad de Química, Universidad Nacional Autónoma de México, Ciudad de México, 04510, México
Francisco Javier Rodríguez Gómez
Affiliation:
Departamento de Ingeniería Metalúrgica, Facultad de Química, Universidad Nacional Autónoma de México, Ciudad de México, 04510, México
*
*Corresponding author: arasv_21@yahoo.com.mx
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Abstract

Dimethylformamide (DMF) has been tested as corrosion inhibitor in a metallic material like API 5LX70 in a corrosive solution of 3% of NaCl and using electrochemical technique as electrochemical impedance spectroscopy. The results showed that 20 ppm is the best concentration to protect the metallic surface of API 5L X70 with η∼ 94%. Hydrodynamic conditions (100 and 1000 rpm) demonstrated that the DMF at different concentration afforded moderate protection against corrosion with inhibition efficiency ∼70%. Finally, the adsorption of this compound follows the Langmuir isotherm with a chemisorption-physisorption process.

Keywords

adsorptioncorrosion

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MRS Advances , Volume 4 , Issue 44-45: Characterization, Processing and Theory , 2019 , pp. 2391 - 2399
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Copyright © Materials Research Society 2019 

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