Analytical and Practical study of some fighting artifacts from Yemen


  • Mohamed M. Megahed Conservation Department, Faculty of Arc haeology, Faiyoum University, Egypt


Parole chiave:

Cu-based alloys, long-term Corrosion, Multivariate Analysis, Microstructure, Chemical composition, Conservation


This paper aims to know the effects of microstructure and chemical composition
on mechanical properties of Cu-based alloys, to know the effects of weight percentage of tin (and other elements in Cu-Sn diagram/ system) on the material structure and mechanical properties, to know the role of microstructure and chemical composition in deterioration process and to identify the types of corrosion products of selected objects as well as their constituting metals in order to carry out scientific treatment and conservation to avoid the further deterioration. The chemical composition analysis declared that the artifacts are made of bronze alloy. The patina of the examined artifacts were consisted of two layers and composed of Cuprite, Atacamite, Paratacamite, Tenorite and Quartz. Metallographic microscopy, Scanning electron microscopy with energy dispersive spectrometry (SEM&EDS) and X-ray diffraction were used to describe the main properties of patina layers and identified the chemical composition. The results were interpreted and classified according to chemical composition of the artifacts. Finally the obtained results helped us in treatment and conservation the selected objects.


Riferimenti bibliografici

J. Audy and K. Audy, Effects of microstructure and chemical composition on strength and impact toughness of tin bronzes, MM Science journal, June 2009.

D. A. Scott, An examination of the patina and corrosion morphology of some Roman bronzes, JAIC, Volume 33, Number 1, Article 1, 1994, pp. 1 - 23.

R. M. Organ, Studies in Conservation 8, 1963, p.1.

R.T. Tylecote, Journal of Archaeological Science 6, 1979, P. 345.

M. P. Casaletto, T. De Card, G.M. Ingo and C. Riccucci, Production of reference "Ancient" Cu- based alloys and their accelerated degradation methods, Applied

Physics A 83, 2006, pp.611- 615.

Evans, U. R., Metallic Corrosion, Passivity and Protection, Robert Cuminghan and Sons LTD, London 1963, p. 493.

I. Constantinides, A. Adriaens, F. Adams, surface characterization of artificial corrosion layers on copper alloys reference materials, applied surface science 189,

el Sevier. Com /locate / apsuse, 2002, pp.90 -101.

M. B. Mcneil, & B. J. Little, The use of Mineralogical data in interpretation of long-term Microbiological corrosion processes: sulfiding reactions, JAIC, Volume 38,

Number 2, Article 6, 1999, pp.186 – 199.

D. A. Scott, Op. Cit., 1994, pp.1 - 23.

D. A. Scott, Copper and Bronze in Art, the Getty conservation institute, Los Angeles 2002.

L. Robbiola, J. M. Blengino and C. Fiaud, Morphology and Mechanisms of Formation of Natural Patinas on Archaeological Cu-Sn Alloys, Corrosion Science, Vol.

, No. 12, 1998, pp. 2083-2111.

M. P. Casaletto, T. De cad, G. M. Ingo and C. Riccucci, Op. Cit., 2006, pp. 617-6 22.

I. Sandu, C. Marutoiu, I. G. Sandu, A. Alexandru and A.V. Sandu, Authentication of Old Bronze Coins I. Study on Archaeological Patina, Acta Universitatis Cibiniensis,

Seria F Chemia 9, 2006, pp. 39-53.

A. G. Nord, E. Mattsson, and K. Tronner, Factors Influencing the Long-term Corrosion of Bronze Artifacts in Soil, Protection of Metals, Vol. 41, No. 4, 2005, pp.


A. Denker, A. Adriaens, M. Dowsett and Alessandra Giumlia-Mair, Non-destructive testing and analysis of museum objects, in COST Action G8, Belgium2006.

Studies in Conservation, 2, 3 (1978), 15-22 a study of reagents used in the stripping of bronzes 19.

H. Khatibul, A note on the efficacy of Ethylene Diamine Tetra Acetic Acid Disodium Salts as a stripping agent for corrosion products of copper, Studies in Conservation

, 2002, pp. 211-216.

G. M. Ingo, T. de Caro, G. Padeletti, G. Chiozzini, Applied Physics 79, 2004, p.319.

N. D. Meeks, Archaeometry 28, 1986, p.133.

D. A. Scott, Journal of American Institute of Conservation 29, 1990, p.193.

M. P. Casaletto, T. D. Card, G. M. Ingo and C. Riccucci, Op. Cit., 2006, pp. 617-622.

B. Madsen, Mikrobiologsk angreb pa bronzerne Fra Budsenebronden, Meddelelser, om Konservering 2, 1977, pp. 264-270.

B., Madsen and H. Hansen, Black spots on bronzes a microbiological chemical attack on bronzes, in the conservation and restoration of metals, Scottish society

for conservation and restoration, Edinburgh, 1979, pp. 33-39.

B. Madsen and H. Hansen, A note on black spots on bronzes, in science and technology in the service of conservation, ed. N.S. Brommelle and G. Thomson, IIC,

London, 1982, p.125.

W. A. Oddy, and N. D Meeks, Unusual phenomena in the conservation of ancient bronzes in science and technology in the service of conservation, ed. N. S.

Brommelle and G. Thomson, IIC, London, 1989, pp.119-124.

M. S. Frant, Copper Sulphide creeps on porous electroplate, journal of the electrochemical society 107, 1960, pp.1009-1011.

S. Kawawata and J. Ogura, Chemical tree deterioration in the insulations of plastics- insulated wires and cables, Hitch: Review 20, 1971, pp.55-63.

N. H. Hansen, Cleaning and Stabilization of sulphide corroded Bronzes, studies in conservation 29, 1984, pp.17-20




Come citare

M. Megahed, M. (2016). Analytical and Practical study of some fighting artifacts from Yemen. Archeomatica, 7(3).



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