Investigation on a “tentacle-like” corrosion feature on Bronze Age tin-bronze objects


Studying the micro-structure of Austrian, Bosnian and Croatian Bronze Age objects made of tin bronze, a rare kind of corrosion feature, called in the following “tentacle-like” according to its specific way of penetrating the metallic matrix, was noted and investigated. Differing from the more classical intergranular, pitting, or crevice corrosion features, the “tentacle-like” corrosion is not following the grain boundaries, nor precisely positioned under the etching area, but penetrates mainly the crystal matrix without any apparent order. This paper discusses the first results achieved and the following hypotheses formulated in respect of the typology of this corrosion. The analyses were carried out by optical microscopy, Raman microspectroscopy, and scanning electron microscopy equipped with EDX spectroscopy for quantitative analyses.

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The authors would like to thank the Austrian Science Fund (FWF) and the FP7/Marie Curie actions who were supporting the research of Marianne Mödlinger with the Schrödinger-fellowship No. J 3109-G21. Special thanks to the curators of the museums concerned who permitted the sampling of the Bronze Age objects: Jacqueline Balen (Arheološki muzej u Zagrebu, Croatia), Lidia Miklik-Lozuk (Muzej Slavonski Brod, Croatia), Vesna Isabegovic and Nataša Perić (Muzej istočne Bosne posjeduje Tuzla, Bosnia-Herzegovina), Hans Reschreiter und Anton Kern (Naturhistorisches Museum Wien), Gemeinde Langenlois.

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Piccardo, P., Mödlinger, M., Ghiara, G. et al. Investigation on a “tentacle-like” corrosion feature on Bronze Age tin-bronze objects. Appl. Phys. A 113, 1039–1047 (2013).

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