A57Fe Mössbauer study of rust coonverters
DOI:
https://doi.org/10.17533/udea.redin.326579Palabras clave:
Convertidores de herrumbre, corrosión atmosférica, espectroscopia Mössbauer, aceros.Resumen
Rust converters are substances used to prepare corroded surfaces in structures, with the purpose to transform the rust oxides or hydroxides to more stable products, thus constraining their participation in further corrosion processes and allowing the application of paint schemes. In this work, results obtained from two different experimental works, which evaluated different converter formulations and type of corroded surface are presented and compared. Sorne of the experimental conditions were similar in both works, i. e., AISI SAE 1008 carbon steels were used, and the samples were pretreated to obtain a certain degree of oxidation using the same standard method by immersiondrying conditions. However, in the first work, the formulations used different concentration in tanic and phosphoric acids as the independent variable and pure isopropilic alcohol, pure terbutilic alcohol and a mixture of them were used as solvents; whereas in the second work, phospboric acid content was maintained constant and variations in tannic acid and as solvents mixtures of isopropilic and terbutilic alcohol were used. Converters were applied over the samples, some of these previously grinded (the superficial rust layer thus eliminated) and others without grinding, before painting and exposed to tests in accelerated corrosion chambers. The transformation of the rust was monitored by Mössbauer 57Fe spectroscopy, both at room temperature and at 77 K. It was found that each content in tannic acid has a mixture of alcohols that improved the rust conversion.
Descargas
Citas
Morcillo, M. et al. "Corrosion of rusted steel in aqueous solution of tannic acid". En: NACE. Vol. 12. No. 48. 1992. p. 1.032. DOI: https://doi.org/10.5006/1.3315906
Galván, J. C. et al. "Effect of treatment with tannic, gallic and phosphoric acid on electrochemical behavior of rusted steel". En: Electrochim. Acta. Vol. 11. No. 37. 1992. p. 1.983. DOI: https://doi.org/10.1016/0013-4686(92)87112-D
Deslauriers, P. J. "Rust conversion coatings". En: Mater. Perfor. Vol. 26. No. 24. 1987.
Barrero, C. A. et al. "Possible improvements of the action of the rust converters" En: Corros. Sci. Vol. 43. 2001. pp. 1.003-1.018. DOI: https://doi.org/10.1016/S0010-938X(00)00139-6
Bolívar, F. "Optimización de la composición de un convertidor de herrumbres" Tesis de Maestría, Posgrado en Ciencias Químicas, Facultad de Ciencias Exactas y Naturales, Universidad de Antioquia. 2002.
Vanderberghe, R. E. et al. "On the methodology of the analysis of Mossbauer spectra". En: Hyp. Interact. Vol. 83. 1994. pp. 29-49. DOI: https://doi.org/10.1007/BF02074257
Descargas
Publicado
Cómo citar
Número
Sección
Licencia
Los artículos disponibles en la Revista Facultad de Ingeniería, Universidad de Antioquia están bajo la licencia Creative Commons Attribution BY-NC-SA 4.0.
Eres libre de:
Compartir — copiar y redistribuir el material en cualquier medio o formato
Adaptar : remezclar, transformar y construir sobre el material.
Bajo los siguientes términos:
Reconocimiento : debe otorgar el crédito correspondiente , proporcionar un enlace a la licencia e indicar si se realizaron cambios . Puede hacerlo de cualquier manera razonable, pero no de ninguna manera que sugiera que el licenciante lo respalda a usted o su uso.
No comercial : no puede utilizar el material con fines comerciales .
Compartir igual : si remezcla, transforma o construye a partir del material, debe distribuir sus contribuciones bajo la misma licencia que el original.
El material publicado por la revista puede ser distribuido, copiado y exhibido por terceros si se dan los respectivos créditos a la revista, sin ningún costo. No se puede obtener ningún beneficio comercial y las obras derivadas tienen que estar bajo los mismos términos de licencia que el trabajo original.
Twitter