Ancient coins: cluster analysis applied to find a correlation between corrosion process and burial soil characteristics

Reale, Rita; Plattner, Susanne Heidi; Guida, Giuseppe; Sammartino, Maria Pia; Visco, Giovanni

doi:10.1186/1752-153x-6-s2-s9

Cited by 13 publications

(7 citation statements)

References 16 publications

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“…In recent years, valuable studies have been performed to characterize changes occurring in archaeological metals to understand their corrosion mechanism and morphology as well as conservation conditions [3][4][5][6][7][8].…”

Section: Introductionmentioning

confidence: 99%

Micro-stratigraphical investigation on corrosion layers in ancient Bronze artefacts by scanning electron microscopy energy dispersive spectrometry and optical microscopy

et al. 2013

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Background: Archaeological metallic artefacts buried in soils deteriorate by means of various environmental as well as internal factors and mechanisms over time such as change in composition and microstructure of metal and corrosive factors due to long-term burial environment. Corrosion in metals occurs in different morphologies and results in different types of corrosion products based on soil composition. Identification of corrosion mechanisms and morphology in archaeological metals can help conservators to characterize deterioration occurred in metals and make decisions to protect artefacts about preventing further deterioration. In archaeological bronzes, different layers may form on the surface of artefacts and their composition, depth and shape depends on factors noted above. Results: In this paper, results of investigation carried out on ancient bronzes discovered from Haft Tappeh archaeological site, southwestern Iran, are presented. The ancient bronze samples are dated to the Middle Elamite period about 14th century BC. Some of the Haft Tappeh bronze artefacts corroded completely and a multilayer structure has formed. To study the stratigraphy of corrosion layers and their composition, some bronze artefacts have been analyzed using SEM-EDS (Scanning Electron Microscopy Energy Dispersive Spectrometry) and Optical Microscopy analyses. The results show difference between the amount of Cu and Sn in layers that may follow from copper leaching from inner layers and formation of copper trihydroxychlorides because of bronze disease.

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Section: Introductionmentioning

confidence: 99%

Micro-stratigraphical investigation on corrosion layers in ancient Bronze artefacts by scanning electron microscopy energy dispersive spectrometry and optical microscopy

et al. 2013

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“…The public bath is outside the town". This description highlights the importance of the city, as shown in the writings of early Arab and Muslim geographers and historians (Ghabbān 2010;Guerra and Tissot 2013;Reale et al 2012).…”

Section: Introductionmentioning

confidence: 64%

Fatimid Dinar Dated 364 A.H. Discovered in Qurh Site, Al Ula Governorate, Saudi Arabia

Alabodi,

Afandy

2024

JJHA

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In Excavation Season XIV in 2017 at Qurh by the Department of Archaeology, College of Tourism and Archaeology, King Saud University, Saudi Arabia, a rare gold dinar was found, minted in Egypt in 364 A.H. (975 A.D.) by Al-Mu‘izz li-Din Allah. The dinar was discovered in square C17, area 3, Qurh (Almabiat) site. It was numbered 27 in the archaeological registry. Square C17 is an architectural extension of the excavation squares C18, C19, C20, D17, D18, D19, and D20. The dinar is the first discovered gold coin in the excavation seasons that began in 2005 at the site. The findings of Qurh are varied in terms of material, manufacturing technology, and provenance. Thus, they include local and imported artifacts. Examining the gold dinar showed a thick layer of dust and calcifications on the surface. The present study tackles the scientific method of examining the gold dinar, diagnosis of deterioration products and causes, stages of restoration and conservation, and analysis of the inscriptions on the reverse and obverse after restoration.

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“…Furthermore, in order to obtain information on the corrosion process on buried coins, a series of ancient coins coming from the archaeological excavation of Palazzo Valentini (Rome) were analyzed by Reale et al 30 looking for a correlation between the corrosion products covering the coins and the chemical-physical soil characteristics. A portable EDXRF was used for X-ray fluorescence measurements.…”

Section: Study Of Corrosion On the Surface Of Coinsmentioning

confidence: 99%

A Review of Energy Dispersive X-Ray Fluorescence (EDXRF) as an Analytical Tool in Numismatic Studies

2016

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Ancient coins: cluster analysis applied to find a correlation between corrosion process and burial soil characteristics

Cited by 13 publications

References 16 publications

Micro-stratigraphical investigation on corrosion layers in ancient Bronze artefacts by scanning electron microscopy energy dispersive spectrometry and optical microscopy

Micro-stratigraphical investigation on corrosion layers in ancient Bronze artefacts by scanning electron microscopy energy dispersive spectrometry and optical microscopy

Fatimid Dinar Dated 364 A.H. Discovered in Qurh Site, Al Ula Governorate, Saudi Arabia

A Review of Energy Dispersive X-Ray Fluorescence (EDXRF) as an Analytical Tool in Numismatic Studies

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