Carbohydrates as Corrosion Inhibitors of API 5L X70 Steel Immersed in Acid Medium
Por:
Espinoza Vazquez, Araceli, Cervantes Robles, Manuel Alejandro, Negron Silva, Guillermo E., Rodriguez Gomez, Francisco Javier, Palomar Pardave, Manuel, Lomas Romero, Leticia, Angeles Beltran, Deyanira, Perez Martinez, Diego
Publicada:
1 sep 2019
Categoría:
Electrochemistry
Resumen:
Commercially available carbohydrates D(+)-glucose (1), D(+)galactose (2)
and lactose (3), along with some synthesized derivatives
Methyl-4,6-O-Benzylidene-alpha-D-glucopyranosae (4), Methyl
4,6-O-benzylidene-2-O-p-toluenesulfonyl-alpha-D-glucopyranose (5),
Methyl 4,6-O-benzylidene-2,3-di-O-ptoluenesulfonyl-alpha-D-glucopyranose
(6), Methyl 2,3-anhydro-4,6-O-benzylidene-alpha-D-mannopyranose (7) and
6-methoxy-2-phenyl-7- (prop-2-yn-1-yloxy) hexahydropyran [3,2-d]
[1,3] dioxin-8-ol (8), have been evaluated as corrosion inhibitors for
API 5L X70 steel immersed in HCl 1M, with stationary conditions. The
best corrosion inhibition was achieved by
Methyl-4,6-O-Benzylidene-alpha-D-glucopyranose (4), with 87% efficiency
at 50 ppm. Worth noting, D(+)-glucose (1) performed better as a
corrosion inhibitor than D(+)galactose (2). Langmuir isotherm studies
showed that all the compounds followed a combined chemical-physical
adsorption process (according to the Gibbs energy data analysis).
SEM-EDS studies confirmed the decrease of the corrosion process on the
steel surface in the presence of the corrosion inhibitors.
Filiaciones:
Univ Nacl Autonoma Mexico, Dept Ingn Met, Av Univ 3000, Mexico City 04510, DF, Mexico
Univ Autonoma Metropolitana, Dept Ciencias Basicas, Mexico City, DF, Mexico
Univ Autonoma Metropolitana, Dept Mat, Mexico City, DF, Mexico
Av San Pablo 180, Ciudad De Mexico 02200, Mexico
Univ Autonoma Metropolitana, Dept Quim, Av San Rafael Atlixco 186, Ciudad De Mexico 09340, Mexico
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