Production of reference 'ancient' Cu-based alloys and their accelerated degradation methods
| Autor: | Gabriel Maria Ingo, M. P. Casaletto, Cristina Riccucci, T. De Caro |
|---|---|
| Rok vydání: | 2006 |
| Předmět: |
68.55.Nq 81.05.Ba
Materials science Scanning electron microscope Metallurgy 68.35.Dv chemistry.chemical_element General Chemistry engineering.material law.invention Corrosion Optical microscope X-ray photoelectron spectroscopy chemistry law engineering Chlorine Degradation (geology) General Materials Science PACS 68.55.Jk Bronze Chemical composition 68.37.Hk |
| Zdroj: | Applied physics. A, Materials science & processing 83 (2006): 617–622. doi:10.1007/s00339-006-3545-9 info:cnr-pdr/source/autori:M.P.Casaletto, T. De Caro, G.M. Ingo, C. Riccucci/titolo:Production of reference "ancient" Cu-based alloys and their accelerated degradation methods/doi:10.1007%2Fs00339-006-3545-9/rivista:Applied physics. A, Materials science & processing (Print)/anno:2006/pagina_da:617/pagina_a:622/intervallo_pagine:617–622/volume:83 |
| ISSN: | 1432-0630 0947-8396 |
| DOI: | 10.1007/s00339-006-3545-9 |
| Popis: | A large number of bronze artefacts found during archaeological excavations carried out in Italy in different contexts have been studied. Their chemical composition and metallurgical features have been determined by the combined use of different analytical surface and bulk techniques, such as optical microscopy (OM), scanning electron microscopy with energy dispersive X-ray micro-analysis (SEM-EDS), X-ray diffraction (XRD) and X-ray photoelectron spectroscopy (XPS). The study of the corrosion products grown on the archaeological Cu-based artefacts and of their metallurgical features has revealed the quite ubiquitous and nearly constant presence of chlorine as the main corroding agent, and the different structures of the alloys. This information has been used to produce reference Cu-based alloys, whose chemical composition and micro-chemical structure is similar to that of the ancient alloys, and to propose the guidelines for carrying out the accelerated degradation tests to produce corroded samples for testing corrosion inhibiting products. The proposed tests were based on soil, chemical and (chemical+soil)-induced degradation, and the micro-chemical structure of the artificially produced corrosion layers has been compared to those grown on archaeological artefacts during burial. The comparison shows that the (chemical+soil)-induced degradation produces "patinas" that are similar to those grown on archaeological artefacts from a chemical, structural and micro-morphological point of view. |
| Databáze: | OpenAIRE |
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