Some Long Term Corrosion Patterns in Archaeological Metal Artefacts
Long term corrosion phenomena are generally not obtained in laboratorial corrosion experiments. Particular features, such as strong intergranular corrosion, can be an indication of the antiquity of a metallic artefact. In the present study, various corrosion features from several archaeological bronze artefacts, with ages ranging from 2 to 5 millenniums, are examined using optical and scanning electron microscopies. Elemental composition was obtained through micro-EDXRF analyses. Corrosion patterns could, in some occasions, be related to specific thermomechanical treatments performed before burial and, in others, with particular phases present in the artefact.
Luís Guerra ROSA and Fernanda MARGARIDO
E. Figueiredo et al., "Some Long Term Corrosion Patterns in Archaeological Metal Artefacts", Materials Science Forum, Vols. 636-637, pp. 1030-1035, 2010