Síntesis, caracterización y evaluación de recubrimientos híbridos porosos sol-gel dopados con acetato de cerio sobre la aleación de magnesio WE54-AE
Abstract
El objetivo del presente trabajo fue sintetizar y caracterizar recubrimientos híbridos sol-gel base sílice dopados con inhibidores de corrosión sobre la aleación de magnesio WE54-AE. Se establecieron como variables de síntesis el tiempo de envejecimiento (hasta 24 horas) y la proporción del agente de entrecruzamiento 3- aminopropiltrietoxisilano, APTES. El inhibidor de corrosión seleccionado fue acetato de cerio en contenido 0,5% molar. El proceso de gelificación fue monitoreado mediante espectroscopía de infrarrojo con transformada de Fourier (FT-IR) y medidas de viscosidad, mientras que los recubrimientos fueron caracterizados mediante microscopía electrónica de barrido (MEB-EDX). Por otro lado, la resistencia a la corrosión fue evaluada a través de ensayos electroquímicos en solución 0,1M de NaCl. Los resultados obtenidos confirmaron que, en general, los recubrimientos obtenidos presentan una mejora de la resistencia a la corrosión con relación a la aleación base. Así mismo, se observó que las variables estudiadas afectaron sustancialmente las características protectoras del recubrimiento, de tal forma que, bajo determinadas condiciones, es posible obtener recubrimientos altamente homogéneos y porosos, característica necesaria para albergar inhibidores de corrosiónDownloads
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References
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[18] M. Damron, et al, “Inorganic/organic hybrid coatings for aircraft aluminum alloy substrates,” Prog. Org. Coat., vol. 41, no. 4, pp.226-232, May. 2001.
[19] “Standard Practice for Microetching Metals and Alloys,” Norma ASTM E407-07e1, Filadelfia (EE.UU.): American Society of Testing and Materials (ASTM), vol. 03.01, 1999.
[20] G. Garcés, et al, “Microstructural and mechanical characterisation of WE54–SiC composites,” Mater. Sci. Eng., A, vol. 527, no. 24-25, pp. 6511–6517, Sep. 2010.
[21] “Standard Practice for Conventions Applicable to Electrochemical Measurements in Corrosion Testing,” Norma ASTM G3-89, Filadelfia (EE.UU.): American Society of Testing and Materials (ASTM), vol. 03.02, 1999.
Published
2014-02-24
How to Cite
Hernández Barrios, C., Hernández Eugenio, L., Coy-Echeverría, A., Duarte Peñaranda, N., Peña Ballesteros, D., & Abrante, F. (2014). Síntesis, caracterización y evaluación de recubrimientos híbridos porosos sol-gel dopados con acetato de cerio sobre la aleación de magnesio WE54-AE. ITECKNE, 10(2), 249-258. https://doi.org/https://doi.org/10.15332/iteckne.v10i2.403
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Research and Innovation Articles
