Conservation of archaeological copper alloy artifacts from Al Ain National Museum collection: the role of desalination

  • Diego Lois Carrera Conservador-Restaurador CENIEH
  • Eduarda Vieira Investigador Centro de Investigação em Ciência e Tecnologia das Artes (CITAR)
  • Eleonora Bosetto Conservador-Restaurador
Keywords: Aleación base-cobre, estabilización, cloruro, capa de pasivación, mínima intervención

Abstract

El Museo Nacional de Al Ain se halla en la ciudad de Al Ain en el Emirato de Abu Dhabi (Emiratos Árabes Unidos). Este Museo preserva una importante colección de objetos neolíticos de aleación base cobre procedentes de diferentes yacimientos localizados en las cercanías de la misma ciudad. Durante el proceso de conservación-restauración de las piezas, se notificó la presencia acusada de iones cloro en la mayoría de los objetos procedentes de los ecosistemas áridos cercanos a la costa donde se encontraron.

Este artículo hace hincapié en los procedimientos de desalación realizados durante el proyecto por ser fundamentales para alcanzar la estabilización de los objetos garantizando su preservación por el mayor tiempo posible. El proceso conocido como B70 ha resultado ser efectivo a pesar de no eliminar todas las sales de los objetos, lo que exige un control de los parámetros ambientales para asegurar la salvaguarda de las colecciones.

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Author Biographies

Diego Lois Carrera, Conservador-Restaurador CENIEH

Diego Lois -has a university degree in Archaeological Conservation (Heritage Conservation High School of Galicia, Pontevedra, Spain) and two Masters, one of Archeology and Heritage (Autonomous University of Madrid, Spain) and other on New Technologies for Cultural Heritage Immovable Conservation (University of Vigo, Spain). He is currently an objects conservator at Nacional Research Centre of Human Evolution (CENIEH), Spain. He worked as an objects conservator at the most prestigious centers in Spain, such as Archaeological National Museum or Spanish Heritage Institute (IPCE), regional museums and international cultural institutions like Heritage Malta and Abu Dhabi Department of Culture and Tourism Authority.  

Eduarda Vieira, Investigador Centro de Investigação em Ciência e Tecnologia das Artes (CITAR)

Eduarda Vieira- holds a PhD in Conservation and Restoration of Historic and Artistic Heritage by the Polytechnic University of Valencia (Spain), and a Master degree in Architectonic Conservation by the Évora University (Portugal).  She is currently Assistant professor at the School of Arts of the Portuguese Catholic University (Conservation of Inorganic Materials), where she coordinates de PhD of Conservation and Restoration of Cultural Goods program. She is vice-director of the Research Center of Science and Technology of the Arts (CITAR) and coordinator of the research focus area of Heritage, Conservation and Restoration and editor of the Studies in Conservation and Restoration -ECR-Estudos de Conservação e Restauro journal. She is also a member of ICOMOS and ICOM and researcher in several projects related with Preventive Conservation and Green Conservation besides supervising several PhD and master thesis.

Eleonora Bosetto, Conservador-Restaurador

Eleonora Bosetto - is a cultural heritage conservator. She gained a Bachelor degree in Technologies for Conservation and Restoration of Cultural Heritage and a Master degree in Art History and Conservation of Cultural Heritage at Bologna University.  Currently, she is in charge of conservation projects for national and international public institutions.

References

ATANASSOVA, V., PENKOVA, P., KOSTADINOV, I., AVDEEV, G. (2019). “Laser removal of chlorine from historical metallic objects”. Proceedings Volume 11047, 20th International Conference and School on Quantum Electronics: Laser Physics and Applications.Event: International Conference and School on Quantum Electronics “Laser Physics and Applications”: ICSQE 2018, 2018, Nessebar. Bulgaria. https://doi.org/10.1117/12.2516813

BERTHOLON R.; RELIER, C. (1990). Les métaux archéologiques. La Conservation en archéologie. Berducou, M. C. Paris, Masson, p. 163-221.

BERTHOLON, R. (2001). “Characterisation and Location of Original Surface of Corroded Metallic Archaeological Objects”. Surface Engineering 17: 240-246.

CANO, E., LAFUENTE, D. (2013): “Corrosion inhibitors for the preservation of metallic heritage artefacts”. Woodhead Publishing. EFC book nº 65, Corrosion and conservation of cultural heritage artefacts.

DÍAZ, S., GARCÍA, E. (2011): Técnicas metodológicas aplicadas a la conservación-restauración del patrimonio metálico. Secretaría General Técnica. Subdirección General de Publicaciones, Información y Documentación. Ministerio de Cultura, Educación y Deporte, España.

DÍAZ, S., GARCÍA, E. (2015): Proyecto COREMANS. Criterios de intervención en materiales metálicos. Ed. Secretaría General Técnica. Subdirección General de Publicaciones, Información y Documentación. Ministerio de Cultura, Educación y Deporte, España.

DILLMANN, P.,BERANGER, G., PICCARDO, P., MATTHIESSEN, H. (2014). Corrosion of Metallic Heritage Artefacts: Investigation, Conservation and Prediction of Long Term Behaviour. Volumen 48 de European Federation of Corrosion (EFC) Series.

FARALDI, F., CORTESE, B., CASCHERA, D., DI CARLO, G., RICCUCCI, C., DE CAROA,T., INGO, G.M. (2017). “Smart conservation methodology for the preservation of copper-based objects against the hazardous corrosion”. Thin Solid Films. Volume 622, 31 January 2017, 130–135. https://doi.org/10.1016/j.tsf.2016.12.024

GANORKAR, M.C., PANDIT RAO, V., GAYATHRI, P., SREENIVASA RAO, T.A. (1988). “A novel method for conservation of copper-based artifacts”. Studies in Conservation 33(2): 97-101. https://doi.org/10.1179/sic.1988.33.2.97

GILBERG, M. (1987). “Friedrich Rathgen: The father of modern archaeological conservation”. Journal of the American Institute for Conservation. Volume 26. https://doi.org/10.1179/019713687806027843

HERRÁEZ, J. A., DE SALAMANCA, G., PASTOR, Mª. J., GIL, T (2014). Manual de seguimiento y análisis de condiciones ambientales. Plan nacional de conservación preventiva. Secretaría General Técnica. Subdirección general de Documentación y Publicaciones. Ministerio de Educación, Cultura y Deporte, España.

JACOT-GUILLARMOD, M., SCHMIDT-OTT, K., MANNES, D., KAESTNER, A., LEHMANN, E., GERVAIS, C. (2019). “Multi-modal tomography to assess dechlorination treatments of iron-based archaeological artifacts”. Heritage Science 7, number 29. https://doi.org/10.1186/s40494-019-0266-x

JOSEPH, E., CARIO, S., SIMON, A., WÖRLE ,M., MAZZEO, R., JUNIER, P., JOB, D. (2012). “Protection of metal artifacts with the formation of metal oxalates complexes by Beauveria bassiana”. Frontiers in Microbiology. Ed. Weiwen Zhang,Tianjin University, China. Volume 2, article 270. https://doi.org/10.3389/fmicb.2011.00270

LIN, H., FRANKEL, G. S. (2013). “Atmospheric corrosion of cu during constant deposition of NaCl”. Journal of The Electrochemical Society, 160(8), C336-C344. https://doi.org/10.1149/2.030311jes

LOGAN, Y. (2007). Recognizing Active Corrosion - Canadian Conservation Institute (CCI) Notes 9/1 part of CCI Notes Series 9 (Metals). Minister of Public Works and Government Services, Canada.

MAGEE, P. (1998). “The chronology and regional context of late prehistoric incised arrowheads in southeastern Arabia”. Arabian Archaeology and Epigraphy, 9(1), 1-12. https://doi.org/10.1111/j.1600-0471.1998.tb00108.x

MARTINEZ, I. (2016). Estudios integrados de procesos analíticos y conservativos de bronce arqueológico. Aplicación a un casco Montefortino y materiales afines. Universitat Politécnica de Valencia.

MUHAMAD, S. A., CHABBI, A. (2013). “Documentation and recording for the conservation of built heritage in Abu Dhabi Emirate”. ISPRS - International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences, Volume XL-5/W2, 2013, 437-442. https://doi.org/10.5194/isprsarchives-XL-5-W2-437-2013

OMID, O. (2018). “A methodological approach to estimate soil corrosivity for archaeological copper alloy artefacts”. Heritage Science 6, nº2. https://doi.org/10.1186/s40494-018-0167-4

ORGAN, M. (1977). “The current status of the treatment for corroed metal artifacts”. Corrosion and Metal Artifacts. National Bureau of Standard Publication 479. Washington: 107-142.

PASÍES, T. (2005). “Los trabajos de conservación y restauración del patrimonio metálico”. Boletin del Centro Arqueológico Saguntino. ARSE 39. 57-62.

PATERAKIS, A. B. (1999). “The hidden secrets of copper alloy artifacts in the Athenian Agora”. In Metals 2001: Proceedings of the International Conference on Metals Conservation. 232-236.

POWER, T. (2015). “A First Ceramic Chronology for the Late Islamic Arabian Gulf”. Journal of Islamic Archaeology, 2(1), 1-33. https://doi.org/10.1558/jia.v2i1.27011

RASKOVA, Z., KRCMA, F. (2007). Plasmachemical reduction for the conservation of archaeological artefacts. Publications of the Astronomical Observatory of Belgrade, vol. 82, 159-170.

RODGERS, BA (2004). “Archaeological Copper (Cu) and Copper Alloys”. The Archaeologist’s Manual for Conservation.105-122.

https://doi.org/10.1007/0-306-48613-X_5

SCHMUTZLER, B., EGGERT, G., KUHN-WAWRZINEK, C. F. (2017). “Copper (II) hydroxide on artefacts: Corrosion, conservation, colourants”. Studies in Conservation, 62(2), 61-67. https://doi.org/10.1080/00393630.2016.1215591

SCOTT, D. A. (2002). Copper and bronze in art: corrosion, colorants, conservation. Getty publications.

SCOTT, D. A. (1990). “Bronze disease: a review of some chemical problems and the role of relative humidity”. Journal of the American Institute for Conservation, 29(2), 193-206. https://doi.org/10.1179/019713690806046064

TAIT, W.S. (2012). The role of chloride ions in spray package corrosion. https://www.spraytm.com/the-role-of-chloride-ions-in-spray-package-corrosion.html

YILDIRIM, E., EL MASRI, S. (2010). “Master planning for heritage conservation in Al Ain Oasis”, UAE. In 46th ISOCARP Congress, Nairobi, Kenya. 19-23

Published
2020-06-25
How to Cite
Lois Carrera, D., Vieira, E., & Bosetto, E. (2020). Conservation of archaeological copper alloy artifacts from Al Ain National Museum collection: the role of desalination. Ge-Conservacion, 17(1), 18-32. https://doi.org/10.37558/gec.v17i1.660