1,721,007 research outputs found
Conservazione e restauro dei metalli: il monumento equestre del Marco Aurelio (Conservation and restoration of metals: the equestrian statue of Marcus Aurelius)
No full textSimple Signal Processing of Linear Voltammetric Data with Matlab©: Interpolation Function for Lacking Data and Filtering (Smoothing)
No full textLa microscopia elettronica a scansione (SEM) con spettrometria a dispersione di energia (EDS) come tecnica di supporto nella diagnosi e nel restauro dei dipinti murali
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. La fontana delle Tartarughe in Roma. Una metodologia di controllo e di studio del deposito delle incrostazioni calcaree.
No full textPortable EDXRF investigation of the patinas on the Riace Bronzes
No full textThis paper summarizes the experimental results concerning the Energy Dispersive X-ray Fluorescence (EDXRF) analysis of patinas on two Riace Bronzes, kept in the National Archaeological Museum of Reggio Calabria (Calabria, Southern Italy). The two large Greek sculptures, famous nude bearded warriors both dated in the fifth century BC, are without a doubt, two masterpieces of inestimable historic and artistic value. EDXRF survey had the aim to determinate the chemical composition of the surface of these two bronze statues and to discriminate their different patinas. In particular, the concentration of sulphur, chlorine, tin, manganese, iron, copper, zinc and lead was determined by using a portable apparatus. Multivariate statistical analysis was carried out in order to identify possible correlations and/or differences of elemental composition among the patinas of these two statues. The information obtained made it possible to improve knowledge about the patinas of the Riace Bronzes, and this may help further studies and subsequent methods of restoration and/or of preservation of the two celebrated Greek sculptures
X-ray fluorescence for the study of the patinas on an outdoor bronze monument
No full textThe aim of this paper is the analysis of main elements of the patinas on an outdoor bronze monument, through the use of a portable Energy Dispersive X-Ray Fluorescence (EDXRF) equipment. In particular we investigated the concentration of copper, tin, lead, calcium, iron, sulphur and chlorine on the patinas of a bronze statue dedicated to Sigismondo Castromediano, which was created in 1905 and later placed in Lecce (Apulia, Southern Italy). Thanks to the versatility of the EDXRF portable apparatus we carried out a complete scan of the monument in a relatively short time. This has enabled us to obtain useful information on the patinas in a completely non-invasive way. EDXRF experimental data demonstrated that the two analysed parts of the monument are constituted by different bronzes, whereas the elements that characterize the depositions are equivalent in the two monitored parts. Moreover, multivariate statistical analysis was carried out in order to identify possible correlations and/or differences of elemental composition among the patinas of these two statues. Finally, a X-Ray Diffraction (XRD) analysis was carried out on a sample of deposit collected from an area of the statue not exposed to the washing away, in order to identify the phases of the deposit and to evaluate possible corrosion products. The main results of XRD analysis show that there are not corrosion products and the deposit is due to suspended particulate. The information obtained can be helpful for both archaeological and conservation studies for possible future monitoring and/or restoration work of the statue in object
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