Integrated analytical methodologies for the study of corrosion processes in archaeological bronzes

Alberghina, Maria Francesca; Barraco, R.; Brai, Maria; Schillaci, Tiziano; Tranchina, Luigi

doi:10.1016/j.sab.2010.12.010

Cited by 45 publications

(26 citation statements)

References 21 publications

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“…[7][8][9] Usually, diagnostic imaging investigations supply a large amount of information useful for a preliminary analysis of the conservation status and the mapping of different materials present on surfaces to be examined. In particular, UV-induced visible fluorescence (UV-IF) imaging can be used for localizing and delimiting the specific areas, i.e., residuals of materials damaged and not visible to the naked eyes, where further deepening spectroscopic and structural analyses is performed.…”

Section: Methodsmentioning

confidence: 99%

Integrated three-dimensional models for noninvasive monitoring and valorization of the Morgantina silver treasure (Sicily)

Alberghina¹,

Alberghina²,

Allegra

et al. 2016

J. Electron. Imaging

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Abstract. The Morgantina silver treasure belonging to the Archaeological Museum of Aidone (Sicily) was involved in a three-dimensional (3-D) survey and diagnostics campaign for monitoring the collection over time in anticipation of their temporary transfer to the Metropolitan Museum of Art in New York for a period of 4 years. Using a multidisciplinary approach, a scientific and methodological protocol based on noninvasive techniques to achieve a complete and integrated knowledge of the precious items and their conservation state, as well as to increase their valorization, has been developed. All acquired data, i.e., 3-D models, ultraviolet fluorescence, x-ray images, and chemical information, will be made available, in an integrated way, within a web-oriented platform, which will present an in-progress tool to deepen existing archaeological knowledge and production technologies and to obtain referenced information of the conservation state before and after moving of the collection from its exposure site.

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Section: Methodsmentioning

confidence: 99%

Integrated three-dimensional models for noninvasive monitoring and valorization of the Morgantina silver treasure (Sicily)

Alberghina¹,

Alberghina²,

Allegra

et al. 2016

J. Electron. Imaging

Self Cite

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“…Then the soil corrosivity is classified into four groups: non-corrosive (0-10), partially corrosive (11)(12)(13)(14)(15)(16)(17)(18)(19)(20), corrosive (21-30) and severely corrosive (31)(32)(33)(34)(35)(36)(37)(38)(39)(40). Figure 5 shows the columnar diagram of soil corrosivity index of the soil samples analysed in two archaeological sites.…”

Section: Soil Corrosivitymentioning

confidence: 99%

“…• Studies about corrosion morphology in buried bronzes [12][13][14], • Studies to identify corrosion compounds and products, phenomena and mechanisms in bronze corrosion [15][16][17][18].…”

Section: Introductionmentioning

confidence: 99%

A methodological approach to estimate soil corrosivity for archaeological copper alloy artefacts

Oudbashi

2018

Herit Sci

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Characterization of soil corrosivity in archaeological sites is an important subject to understand the conservation conditions of archaeological bronze collections and helps conservators to prepare a conservation strategy for long term preservation of bronze objects. In this paper, a research approach is established to identify soil corrosivity in two archaeological sites and to find correlation between corrosion events and soil characterizations. Therefore, an analytical study was carried out to identify different factors of soil environment influencing corrosivity of the soil in two sites. Based on the results, measuring different factors such as chemical composition, pH, texture, soluble salts and water content and SOM displayed different soil environments in two archaeological sites. The results represent correlative relationship between corrosion mechanism and soil characteristics in these archaeological sites.

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“…The method was chosen because it is easily interpretable and physically relevant. Data analysis on (corrected) raw spectra, which contain more information [26,32,33], as well as the use of other types of multivariate analysis [34,35], may result in more detailed differentiation of paints. However, these methods fall outside the scope of our study at this explorative stage.…”

Section: Data Explorationmentioning

confidence: 99%

The white of the 20th century: an explorative survey into Dutch modern art collections

et al. 2018

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White pigments were abundantly used in 20th century paintings, and relate to several degradation risks such as titanium white mediated photocatalytic binder degradation or zinc soap formation. Knowledge about the white pigments that were used is essential for risk assessments of 20th century collections. In this study, a representative set of 179 paintings in Dutch modern art collections were analyzed by portable X-ray fluorescence spectrometry. Subsequent explorative data analysis was performed, supported by qualitative findings from 140 home-made reference samples. Micro-samples were further investigated by X-ray diffraction and scanning transmission electron microscopy to gain information about crystal structure and surface coating. This study reveals that Dutch 20th century artists were hesitant to use titanium white. In the Netherlands, the use of this pigment is observed convincingly from the 1970s onward and initially mostly in non-oil binders. Additionally, lead white was used until late in the 20th century for paints and grounds but rarely mixed with titanium white in paints. The study also indicated that many CoBrA artists used zinc white, underlining the risk of degradation due to soap formation. Furthermore, this study highlights the different production processes of titanium white. Through the association of titanium with niobium, an impurity only present for sulfate processed pigments, the production process can be identified. The absence of niobium indicates the presence of rutile and is thus a sign of paint stability, as well as a 'post 1959' dating. This explorative study illustrates the value of a combination of data analysis approaches, which includes assessment of spectra as well as descriptive, bivariate and multivariate analysis, for medium-sized datasets gathered at similar conditions.

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Integrated analytical methodologies for the study of corrosion processes in archaeological bronzes

Cited by 45 publications

References 21 publications

Integrated three-dimensional models for noninvasive monitoring and valorization of the Morgantina silver treasure (Sicily)

Integrated three-dimensional models for noninvasive monitoring and valorization of the Morgantina silver treasure (Sicily)

A methodological approach to estimate soil corrosivity for archaeological copper alloy artefacts

The white of the 20th century: an explorative survey into Dutch modern art collections

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