Atmospheric corrosion of patinated silverwork: a conservation challenge
Autor(a) principal: | |
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Data de Publicação: | 2016 |
Outros Autores: | , , |
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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7160 |
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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 |
url |
http://scielo.pt/scielo.php?script=sci_arttext&pid=S0870-11642016000200002 |
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 |
repository.mail.fl_str_mv |
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1799137254647529472 |