Aplicación de tratamiento electroquímico a baja intensidad de corriente para la extracción de cloruros en objetos arqueológicos de hierro de procedencia subacuática. Observación de la evolución de fases mineralógicas mediante XRD-<i>Rietveld</i>

M. Bethencourt; M. L.A. Gil; C. Fernández-Lorenzo; A. Santos

doi:10.3989/revmetalm.2004.v40.i6.300

Application of low current intensitys electrolytic treatment for the chlorides extraction in underwater archaeological objects of iron. Observation of the mineralogical phases evolution through XRD-"Rietveld"

Authors

M. Bethencourt Departamento de Ciencia de Los Materiales e Ingeniería Metalúrgica y Química Inorgánica. Facultad De Ciencias Del Mar. Universidad De Cádiz
M. L.A. Gil Departamento de Química Física. Facultad de Ciencias. Universidad de Cádiz
C. Fernández-Lorenzo Departamento de Química Física. Facultad de Ciencias. Universidad de Cádiz
A. Santos Departamento de Cristalografía y Mineralogía, Estratigrafía, Geodinámica y Petrología y Geoquímica. Facultad de Ciencias del Mar. Universidad de Cádiz

DOI:

https://doi.org/10.3989/revmetalm.2004.v40.i6.300

Keywords:

Conservation of iron objects, extraction of chlorides, x ray diffraction,

Abstract

With the purpose of optimising a suitable methodology for the conservation of an archaeological object of iron, a low current intensities electrolytic treatment has been applied, to a piece of cast iron, proving to be effective in the extraction of chloride ions from the structure of akaganeite, principal corrosion product of iron in the marine medium. The monitoring of the electrolytic treatment has been proven by applying the "Rietveld" method to the patterns XRD of samples extracted from the corroded surface before and after the treatment. This method has permitted the unequivocal determination of the akaganeite and its chemical composition. This identification has been corroborated by means of SEM and EDS. After the electrolytic treatment, akaganeite was not present in the sample.

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Published

2004-12-30

How to Cite

Bethencourt, M., Gil, M. L., Fernández-Lorenzo, C., & Santos, A. (2004). Application of low current intensitys electrolytic treatment for the chlorides extraction in underwater archaeological objects of iron. Observation of the mineralogical phases evolution through XRD-"Rietveld". Revista De Metalurgia, 40(6), 420–425. https://doi.org/10.3989/revmetalm.2004.v40.i6.300

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Issue

Vol. 40 No. 6 (2004)

Section

Articles

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