Le thesaurus de Sora

Il contenuto di un tesoro scoperto nell'asse di un tempio a Sora (Lazio) appartiene alla circolazione dell'epoca di Caligola. Il confronto délia sua posizione con quella di altri esemplari da ulteriori chiarimenti sulla funzione dei thesauri.Catalli Fiorenzo, Scheid John. Le thesaurus de Sora. In: Revue numismatique, 6e série - Tome 36, année 1994 pp. 55-65

Sylloge Nummorum Romanorum. Italia, Firenze, Monetiere del Museo Archeologico di Firenze, vol. II, Tiberius Claudius Nero (14- 37 d.C.), Caius Caesar Germanicus (37-41 d.C.), Tiberius Claudius Nero Germanicus (41- 54 d.C.)

International audienceSylloge Nummorum Romanorum. Italia, Firenze, Monetiere del Museo Archeologico di Firenze, vol. II, Tiberius Claudius Nero (14- 37 d.C.), Caius Caesar Germanicus (37-41 d.C.), Tiberius Claudius Nero Germanicus (41- 54 d.C.)

Sylloge Nummorum Romanorum. Italia, Firenze, Monetiere del Museo Archeologico di Firenze, vol. II, Tiberius Claudius Nero (14- 37 d.C.), Caius Caesar Germanicus (37-41 d.C.), Tiberius Claudius Nero Germanicus (41- 54 d.C.)

International audienceSylloge Nummorum Romanorum. Italia, Firenze, Monetiere del Museo Archeologico di Firenze, vol. II, Tiberius Claudius Nero (14- 37 d.C.), Caius Caesar Germanicus (37-41 d.C.), Tiberius Claudius Nero Germanicus (41- 54 d.C.)

Regio XIV, Transtiberim. Nuovi dati per la ricostruzione del paesaggio urbano antico

http://www.fastionline.org/docs/FOLDER-it-2009-163.pd

Musarna (Viterbe)

Broise H., Jolivet Vincent, Petitti P., Catalli Fiorenzo, Tagliacozzo Antonio. Musarna (Viterbe) . In: Mélanges de l'École française de Rome. Antiquité, tome 102, n°1. 1990. pp. 477-480

Micro and nanoscale structures and corrosion patterns in Brass. The case study of ancient roman orichalcum coins

This study investigated the micro and nanoscale structure in Cu-Zn alloy, as well as its corrosion patterns. To achieve this goal, a set of Roman orichalcum coins were analysed using Scanning Electron Microscopy (SEM-EDS), X-ray maps, high resolution field emission scanning electron microscopy (HR-FESEM-EDS) and electron microprobe analyser (EMPA) techniques. The samples showed a high degree of corrosion on their external surfaces, which evolved in depth up to ~1 mm. Micro and sub-micro imaging of the inner metal highlighted the presence of “stressed areas” caused by mechanical processing work, representing the trigger zone of corrosion and causing the loss of material. These images also permitted us to follow the grain-grain interface and selective Zn-dealloying in the examined samples. X-ray maps of Cu and Zn helped us to understand the evolution of the dezincification process, from rim to core. HR-FESEM-EDS imaging investigation highlighted a heterogeneous composition within the strain line structures, confirming that the mechanically stressed areas were active zones for corrosion processes. Cracks and voids also characterised the patina. Conversely, the uncorroded cores of the samples were not affected by dealloying

HR-FESEM-EDS study of corrosion pattern in Cu-Zn based alloy

Corrosion phenomena are processes that can create several problems in archaeological materials. Nanoscale studies of the corrosion mechanism of ancient alloys and the distribution of the damage both on the patina and in the core of metal object represent one of the major challenges that must be implemented to protect archaeological metal findings. In this research, the corrosion pattern of Cu-Zn-based Roman coins was investigated from micro to nanoscale using SEM-EDS and HR-FESEM-EDS (high resolution field emission scanning electron microscope). Both the patinas and the uncorroded cores of the samples were analysed, exploring the nature of the alloy, structures and complex patterns of the external layers. The high magnification imaging highlighted signs of selective corrosion, depending of the Cu-Zn ratio, as well as marks of cold-working of coins. The X-ray maps showed the distribution of the elements that compose the samples, helping to understand the evolution of the dezincification processes. Nanoscale investigation highlighted a heterogeneous composition within the strain lines structures, induced by selective de-alloying. The corroded micro and nanodomains were explored in depth to study the structural constrains which control altered areas inside orichalcum coins. We evaluated also all the parameters that induced corrosion and dealloying. The results suggested that mechanical stressed-areas could be the trigger zone of corrosion processes. Moreover, this research aimed to fill the scientific gap about this ancient alloy and to improve the knowledge on the mechanisms involved in orichalcum degradation

The application of non-destructive techniques for the study of corrosion patinas of ten Roman silver coins. The case of the medieval Grosso Romanino

This work focuses on the study of ten Grosso Romanino, a silver medieval coin, minted in Rome during the 13th century CE. As the coinage of this denomination occurred during a tumultuous period of the history of Rome, the official documentation from Mint was lost. For this reason, archaeometric investigations were necessary to have an overall knowledge of the Grosso Romanino. This work represents the first attempt of archaeometric study performed on this interesting denomination. The coins were characterized by a combination of non-destructive techniques, i.e., X-ray diffraction (XRD), Scanning Electron Microscopy (SEM-EDAX), micro-Raman spectroscopy and Voltammetry of Microparticles (VIMP), aiming to investigate the external surface and its microstructure and to explore the nature of the alloy and corrosion products. The results show an Ag- rich alloy with minor amount of copper (2.1–3.1 wt%), lead (0.7–3.2 wt%) and other elements. Moreover, the rare corrosion products on the surfaces indicate the presence of a random distributed patina composed by oxides, sulfides and chlorides