Intergranular Failure of Roman Silver Artefacts


Article Preview

Silver objects obtained from archaeological excavations often exhibit an extended embrittlement. The causes of this embrittlement were studied on silver artefacts buried for more than one thousand years in the soil using light and electron microscopy techniques and EDX microanalysis. Our investigation revealed presence of chlorine, sulphur and oxygen along the grain boundaries suggesting that most likely, the catastrophic failure of the grave objects made of Ag–Cu alloys is caused by an intercrystalline corrosion attack. The role of possible grain boundary segregation and/or precipitation of copper as a path of easy corrosion is discussed.



Materials Science Forum (Volumes 567-568)

Edited by:

Pavel Šandera




J. Vaníčková et al., "Intergranular Failure of Roman Silver Artefacts", Materials Science Forum, Vols. 567-568, pp. 213-216, 2008

Online since:

December 2007




[1] G.M. Ingo, E. Angelini: Surface and Interface Analysis, Vol. 34, 1, (2002), pp.328-336.

[2] F.C. Thompson, A.K. Chatterjee: Studies in Conservation, Vol. 1, (1954), pp.115-26.

[3] R.J.H. Wanhill, J.P.H.M. Steijaert, R. Leenheer, J.F.W. Koens: Archaeometry, Vol. 40, 1, (1998), pp.123-137.

[4] M. Kallfass, J. Paul, H. Jehn: Praktische Metallografie, Vol. 22, 7, (1985), pp.317-323.

[5] F. Schweizer, P. Meyers: In Proceedings of the 18th International Symposium on Archaeometry and Archaeological Prospection, Bonn, (1979), pp.287-298.

[6] I.G. Ravich: In 10th Triennial Meeting of the International Council of Museums Committee for Conservation, Washington, (1993), pp.792-795.

[7] G. Stawinoga: Arbeitsblätter für Restauratoren, Vol. 30, 2, (1997), pp.137-142.

[8] J. Děd, P. Bartuška, A. Šilhová: In: National Conference AKI, Znojmo-Přímětice, (2004). In Czech.

[9] R.J.H. Wanhill: NLR Technical Publication NLR-TP-2002-224, NLR, Amsterdam, (2002).