Metal Corrosion in Polychrome Baroque Lead Sculptures: a Case Study

Faria, Dalva Lúcia Araújo de; Puglieri, Thiago Sevilhano; Souza, Luiz Antônio Cruz

doi:10.5935/0103-5053.20130170

Cited by 3 publications

(2 citation statements)

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“…Chumbo é um metal frequentemente encontrado em bens culturais (apesar de estar banido atualmente por sua toxicidade) e estudos sobre sua corrosão por compostos orgânicos voláteis (VOCs -volatile organic compounds) emitidos tanto por fontes naturais como a madeira, quanto por fonte antropogênicas como resinas, tintas, colas etc. foram recentemente publicados (DE FARIA e PUGLIERI, 2010;DE FARIA et al, 2013;PUGLIERI et al, 2014). Essas publicações demonstram que atenção especial deve ser dedicada às condições de armazenamento e manejo de bens culturais, inclusive aqueles que já se encontram deteriorados, para os quais a identificação dos produtos de corrosão formados tem especial relevância (BARBOSA et al, 2018).…”

Section: Aplicações Em Estudos De Bens Culturais -América Do Sulunclassified

Espectroscopia Raman e a Ciência do Patrimônio: aspectos gerais e panorama atual na América do Sul

Faria

2018

Cad. LEPAARQ

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As últimas décadas tem presenciado um crescente aumento no uso de métodos físico-químicos de análise de bens culturais. Algumas dessas técnicas tem se mostrado particularmente úteis pelo caráter não invasivo e não destrutivo que apresentam e, dentre elas, a espectroscopia Raman apresenta posição de destaque. Neste artigo, essas características da técnica são detalhadas, bem como são apresentados os fundamentos teóricos do espalhamento inelástico de luz e discutidos alguns aspectos práticos de sua utilização. Finalmente, é apresentado um levantamento detalhado dos grupos de pesquisa da América do Sul, voltados ao estudo de bens culturais, que tem se utilizado dessa ferramenta analítica e em qual tipo de questionamentos vem sendo aplicada. Abstract: The last decades have witnessed an ever growing increase in the usage of physico-chemical methods to investigate cultural heritage problems. Some of these techniques are proving to be particularly useful in such a context, due to their non-invasive and non-destructive nature; among them, Raman spectroscopy occupies a prominent position. In this paper, such characteristics of the technique are detailed and the physical basis of inelastic light scattering are presented, together with some practical aspects of its applications. Finally, it is here offered a detailed survey in the literature on the South American research groups devoted to the investigation of cultural heritage issues who are using Raman spectroscopy, and the type of interrogation carried on.

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Section: Aplicações Em Estudos De Bens Culturais -América Do Sulunclassified

Espectroscopia Raman e a Ciência do Patrimônio: aspectos gerais e panorama atual na América do Sul

Faria

2018

Cad. LEPAARQ

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“…In those indoor or enclosed environments, the emitting materials of volatile organic acids (and aldehydes) may vary. Among these wood-based materials, glues, paints, and varnishes, that are part of the compartments (e.g., cabinets, boxes, and drawers) or supporting structures (e.g., shelves) that are used to exhibit or store the objects are included (Clarke & Longhurst, 1961;Ryhl-Svendsen & Glastrup, 2002;de Thickett & Lee, 2004;Robinet & Thickett, 2005;Grzywacz, 2006;Gibson & Watt, 2010;De Laet et al, 2013;Faria et al, 2013;Prosek et al, 2014). In addition, the wood materials that are used to protect or to improve the esthetic aspect of the metal object, or that are part of it (e.g., wood sections of weapons or tools) can also be important sources of contamination, especially when in direct contact with the object (Deflorian & Fedel, 2013).…”

Section: The Lighter Organic Salts Of Copper: Origin and Analytical Imentioning

confidence: 99%

On the Chemical Signature and Origin of Dicoppertrihydroxyformate (Cu₂(OH)₃HCOO) Formed on Copper Miniatures of 17th and 18th centuries

et al. 2016

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A corrosion product rarely reported in the literature has been found on the copper support of three miniature paintings of the 17th and 18th centuries. This product, which has been identified as dicoppertrihydroxyformate (Cu2(OH)3HCOO), is an unusual basic copper formate found on copper artifacts. The identification and characterization of dicoppertrihydroxyformate was carried out directly over the corroded surface of the objects, using a nondestructive approach, which combines the integrated use of various microanalytical techniques. Using this approach, it was possible to obtain a set of new reference data about the natural form of Cu2(OH)3HCOO, that will enable its unambiguous identification in other similar objects. In this work, the probable causes that may have contributed to its formation are also discussed.

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But aren’t all soaps metal soaps? A review of applications, physico-chemical properties of metal soaps and their occurrence in cultural heritage studies

Russo,

Brambilla,

Thomas

et al. 2023

Herit Sci

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Metal soaps, the organic salts resulting from the interaction of fatty acids and metal cations, arouse interest in the scientific field because of their versatility in a great range of chemical applications as well as because of the mechanism of their formation during degradation processes. This article presents a review of the synthetic pathways used to produce metal soaps, their relevant physico-chemical properties, and how these reflect in their applications. Common industrial uses of metal soaps are reported, with a particular focus on those applications, such as cosmetics, paints, and coatings, that have an impact on the cultural heritage field. In addition, the occurrence of metal soaps in cultural heritage studies is presented, ranging from archaeological and ethnographic artefacts to fine art objects, and discussed per class of materials. An overview of the presence or absence of metal soaps in historical artefacts due to the interaction of metal parts or mineral pigments with fatty acids is given herein. This collection shows a variety of situations in which metal soaps—particularly lead, zinc and copper soaps—can form on composite objects made of different materials such as wood, leather and fatty-acid-containing materials (e.g., waxes), in the presence of metal, metal alloys or pigments.

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Metal Corrosion in Polychrome Baroque Lead Sculptures: a Case Study

Cited by 3 publications

References 0 publications

Espectroscopia Raman e a Ciência do Patrimônio: aspectos gerais e panorama atual na América do Sul

Espectroscopia Raman e a Ciência do Patrimônio: aspectos gerais e panorama atual na América do Sul

On the Chemical Signature and Origin of Dicoppertrihydroxyformate (Cu₂(OH)₃HCOO) Formed on Copper Miniatures of 17th and 18th centuries

But aren’t all soaps metal soaps? A review of applications, physico-chemical properties of metal soaps and their occurrence in cultural heritage studies

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Metal Corrosion in Polychrome Baroque Lead Sculptures: a Case Study

Cited by 3 publications

References 0 publications

Espectroscopia Raman e a Ciência do Patrimônio: aspectos gerais e panorama atual na América do Sul

Espectroscopia Raman e a Ciência do Patrimônio: aspectos gerais e panorama atual na América do Sul

On the Chemical Signature and Origin of Dicoppertrihydroxyformate (Cu2(OH)3HCOO) Formed on Copper Miniatures of 17th and 18th centuries

But aren’t all soaps metal soaps? A review of applications, physico-chemical properties of metal soaps and their occurrence in cultural heritage studies

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Product

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On the Chemical Signature and Origin of Dicoppertrihydroxyformate (Cu₂(OH)₃HCOO) Formed on Copper Miniatures of 17th and 18th centuries