Mechanism of dissolution of a Cu–13Sn alloy in low aggressive conditions

Mabille, Isabelle; Ardouin, Bertrand; Sutter, Éliane; Fiaud, C.

doi:10.1016/s0010-938x(02)00207-x

Cited by 62 publications

(40 citation statements)

References 17 publications

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“…The presence of tin-rich phase in the center of samples is due to an identified process namely decuprification or selective dissolution of Cu [15][16][17][18]. It occurs because of Cu dissolution in corrosion of bronze artefacts in various environments such as soil.…”

Section: Resultsmentioning

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: Resultsmentioning

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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“…and exhibiting protective effects on the surface [4]. B 1 curve reveals a large anodic peak (around 421 mV/SCE), relative to the oxidation followed by the transformation/formation of copper and tin species [2,4]. The peak characteristics (potential, current) are function of the concentration of ions present in the electrolyte and are related to oxides and hydroxides as well as chlorides and sulphates of tin and copper compounds [2,4,22].…”

Section: Stationary Behaviourmentioning

confidence: 99%

“…B 1 curve reveals a large anodic peak (around 421 mV/SCE), relative to the oxidation followed by the transformation/formation of copper and tin species [2,4]. The peak characteristics (potential, current) are function of the concentration of ions present in the electrolyte and are related to oxides and hydroxides as well as chlorides and sulphates of tin and copper compounds [2,4,22]. However, concerning B 2 , the current plateau is followed by a broad activity peak due to tin containing compounds, probably a mix of stannous and stannic oxides also containing sulphates and hydroxides [2,22] with a maximum value of the current density at 118 mV/SCE, followed by a second peak at 474 mV/SCE with a current of 0.41 mA/ cm 2 related to further oxidation of corrosion product assuring the formation of some new protective layer.…”

Section: Stationary Behaviourmentioning

confidence: 99%

“…Patina formation and the corrosion of ancient bronze objects in aqueous environments have been studied by multiple techniques, in various kinds of solutions and with various approaches [1][2][3][4][5][6][7][8][9][10], yet there are few detailed descriptions of the corrosion mechanism in soil. According to Geilmann, (cited by Scott [10]), the formation of patinas in burial is ascribed to oxygen and carbon dioxide present in the environmental context (as for example in humus or porous sandy soils).…”

Section: Introductionmentioning

confidence: 99%

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Assessment of the interphase behaviour of two bronze alloys in archaeological soil

Hassairi

Bousselmi²,

Triki³

et al. 2007

Materials & Corrosion

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The aim of this work is to evaluate the behaviour of bronze in archaeological soil by gravimetric study, electrochemical research and analytic survey. Archaeological soil samples were collected from Jama that date back to the second Punic war. Mineralogical, micro‐structural, micro‐morphological and chemical analyses of soil constituents were performed. The bronze samples correspond to Cu‐9.4Sn (B1) and Cu‐7.7Sn with 1% of Pb (B2). The open circuit potential value recorded for B2/corrosion product/soil is stable after only 7 min due to its reactivity allowing to a rapid development of a protective corrosion layer. The B2 interphase is more developed and stable than B1. Under anodic polarisation, the B2 alloy corrodes less than the B1 alloy owing to its lower anodic current. Based on the EIS study, two evolution stages of the bronze alloy/corrosion product/soil interphase are detected. For the first stage, the interphase is equivalent to two R//C loops at high and medium frequencies, respectively related to the corrosion layer and charge transfer process, associated to mass transport phenomena. For the second stage, the resistance of corrosion layer decreases and the first loop vanishes. SEM‐EDS analysis demonstrate that the first stage (20 days of immersion) can be characterized by a well covered surface with a thin corrosion product, the external layer exhibits low tin content. However, after 310 days of immersion, the surface state is different with isolated particulates composed by Cu and soil compounds on a cracked layer with the presence of craters showing an internal layer.

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“…Primećeno je i da krive imaju isti oblik bez obzira da li je u pitanju osnovni rastvor ili rastvor sa određenom koncentracijom inhibitora. Rezultati koji su prikazni pokazuju da je na početku eksperimenta vrednost gustine struje veća, mada jako brzo opada, a onda nakon nekog vremena dostiže konstantnu vrednost što može biti potvrda formiranja zaštitnog filma na površini bakarne elektrode u prisustvu 2-merkapto-1-metilimidazola, koji sprečava dalje rastvaranje bakarne elektrode [46]. Snimljene hronoamperometrijske krive u kiselom rastvoru Na 2 SO 4 sa dodatkom različitih koncentracija MMI, koje su prikazane na slici 4a, ukazuju na adsorpciju molekula inhibitora na površini elektrode [16] i formiranje zaštitnog sloja [47].…”

Section: Hronoamperometrijaunclassified

Compounds from the imidazole group as copper corrosion inhibitor in acidic sodium sulphate solution

Simonović¹,

Radovanović²,

Mihajlovic-Petrovic³

et al. 2017

Zas Mat

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Mechanism of dissolution of a Cu–13Sn alloy in low aggressive conditions

Cited by 62 publications

References 17 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

Assessment of the interphase behaviour of two bronze alloys in archaeological soil

Compounds from the imidazole group as copper corrosion inhibitor in acidic sodium sulphate solution

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