Atmospheric corrosion of patinated silverwork: a conservation challenge

Detalhes bibliográficos
Autor(a) principal: Tissot,Isabel
Data de Publicação: 2016
Outros Autores: Monteiro,Olinda C., Barreiros,Maria Alexandra, Guerra,Maria Filomena
Tipo de documento: Artigo
Idioma: eng
Título da fonte: Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)
Texto Completo: http://scielo.pt/scielo.php?script=sci_arttext&pid=S0870-11642016000200002
Resumo: Patination has been frequently used by jewellers to modify the colour of silver alloys. By application of a solution of sulphur compounds, blackish or bluish surfaces can be obtained, but the intentionally produced silver-sulphur compounds are chemically similar to the atmospheric corrosion products that develop on silver alloys. The conservation of patinated silver objects, such as Art Nouveau jewellery, raises thus analytical challenges. In order to define accurate conservation treatments, the patina and corroded surfaces characterisation is mandatory. In this study, sterling silver samples were patinated and subjected to corrosion by immersion in a sulphide containing solution. The identification of the chemical compounds present on the patinated sterling silver before and after corrosion was carried out by UV-visible spectrophotometry, X-ray diffraction and scanning electron microscopy with energy dispersive X-ray spectrometry. Data obtained suggest a two-stage corrosion process: a decrease of the silver compounds patina thickness caused by its dissolution, followed by the formation of corrosion products with different compositions and morphologies containing silver and copper sulphur compounds.
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spelling Atmospheric corrosion of patinated silverwork: a conservation challengePatinationSilverworkSterling SilverAtmospheric CorrosionConservaonPatination has been frequently used by jewellers to modify the colour of silver alloys. By application of a solution of sulphur compounds, blackish or bluish surfaces can be obtained, but the intentionally produced silver-sulphur compounds are chemically similar to the atmospheric corrosion products that develop on silver alloys. The conservation of patinated silver objects, such as Art Nouveau jewellery, raises thus analytical challenges. In order to define accurate conservation treatments, the patina and corroded surfaces characterisation is mandatory. In this study, sterling silver samples were patinated and subjected to corrosion by immersion in a sulphide containing solution. The identification of the chemical compounds present on the patinated sterling silver before and after corrosion was carried out by UV-visible spectrophotometry, X-ray diffraction and scanning electron microscopy with energy dispersive X-ray spectrometry. Data obtained suggest a two-stage corrosion process: a decrease of the silver compounds patina thickness caused by its dissolution, followed by the formation of corrosion products with different compositions and morphologies containing silver and copper sulphur compounds.LNEG - Laboratório Nacional de Energia e Geologia, I.P.2016-12-01info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/articletext/htmlhttp://scielo.pt/scielo.php?script=sci_arttext&pid=S0870-11642016000200002Corrosão e Protecção de Materiais v.35 n.2 2016reponame:Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)instname:Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informaçãoinstacron:RCAAPenghttp://scielo.pt/scielo.php?script=sci_arttext&pid=S0870-11642016000200002Tissot,IsabelMonteiro,Olinda C.Barreiros,Maria AlexandraGuerra,Maria Filomenainfo:eu-repo/semantics/openAccess2024-02-06T16:58:55Zoai:scielo:S0870-11642016000200002Portal AgregadorONGhttps://www.rcaap.pt/oai/openaireopendoar:71602024-03-20T02:15:26.186489Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) - Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informaçãofalse
dc.title.none.fl_str_mv Atmospheric corrosion of patinated silverwork: a conservation challenge
title Atmospheric corrosion of patinated silverwork: a conservation challenge
spellingShingle Atmospheric corrosion of patinated silverwork: a conservation challenge
Tissot,Isabel
Patination
Silverwork
Sterling Silver
Atmospheric Corrosion
Conservaon
title_short Atmospheric corrosion of patinated silverwork: a conservation challenge
title_full Atmospheric corrosion of patinated silverwork: a conservation challenge
title_fullStr Atmospheric corrosion of patinated silverwork: a conservation challenge
title_full_unstemmed Atmospheric corrosion of patinated silverwork: a conservation challenge
title_sort Atmospheric corrosion of patinated silverwork: a conservation challenge
author Tissot,Isabel
author_facet Tissot,Isabel
Monteiro,Olinda C.
Barreiros,Maria Alexandra
Guerra,Maria Filomena
author_role author
author2 Monteiro,Olinda C.
Barreiros,Maria Alexandra
Guerra,Maria Filomena
author2_role author
author
author
dc.contributor.author.fl_str_mv Tissot,Isabel
Monteiro,Olinda C.
Barreiros,Maria Alexandra
Guerra,Maria Filomena
dc.subject.por.fl_str_mv Patination
Silverwork
Sterling Silver
Atmospheric Corrosion
Conservaon
topic Patination
Silverwork
Sterling Silver
Atmospheric Corrosion
Conservaon
description Patination has been frequently used by jewellers to modify the colour of silver alloys. By application of a solution of sulphur compounds, blackish or bluish surfaces can be obtained, but the intentionally produced silver-sulphur compounds are chemically similar to the atmospheric corrosion products that develop on silver alloys. The conservation of patinated silver objects, such as Art Nouveau jewellery, raises thus analytical challenges. In order to define accurate conservation treatments, the patina and corroded surfaces characterisation is mandatory. In this study, sterling silver samples were patinated and subjected to corrosion by immersion in a sulphide containing solution. The identification of the chemical compounds present on the patinated sterling silver before and after corrosion was carried out by UV-visible spectrophotometry, X-ray diffraction and scanning electron microscopy with energy dispersive X-ray spectrometry. Data obtained suggest a two-stage corrosion process: a decrease of the silver compounds patina thickness caused by its dissolution, followed by the formation of corrosion products with different compositions and morphologies containing silver and copper sulphur compounds.
publishDate 2016
dc.date.none.fl_str_mv 2016-12-01
dc.type.status.fl_str_mv info:eu-repo/semantics/publishedVersion
dc.type.driver.fl_str_mv info:eu-repo/semantics/article
format article
status_str publishedVersion
dc.identifier.uri.fl_str_mv http://scielo.pt/scielo.php?script=sci_arttext&pid=S0870-11642016000200002
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dc.language.iso.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv http://scielo.pt/scielo.php?script=sci_arttext&pid=S0870-11642016000200002
dc.rights.driver.fl_str_mv info:eu-repo/semantics/openAccess
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv text/html
dc.publisher.none.fl_str_mv LNEG - Laboratório Nacional de Energia e Geologia, I.P.
publisher.none.fl_str_mv LNEG - Laboratório Nacional de Energia e Geologia, I.P.
dc.source.none.fl_str_mv Corrosão e Protecção de Materiais v.35 n.2 2016
reponame:Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)
instname:Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação
instacron:RCAAP
instname_str Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação
instacron_str RCAAP
institution RCAAP
reponame_str Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)
collection Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)
repository.name.fl_str_mv Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) - Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação
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