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4
Analyticaltechniquesforthestudyof
corrosionofmetallicheritageartefacts:from
micrometertonanometerscales
D.NEFF,LaboratoireArchéomatériauxetPrévisionde
L’Altération,France,S.REGUER,SynchrotronSoleil,
FranceandP.DILLMANN,CNRS/CEA,France
DOI:10.1533/9781782421573.2.55
Abstract:Thischapterintroducesthetechniquesusedwheninvestigating
corrosionlayersformedonculturalheritageartefacts.Variousmulti-
scaleanalysismethods,frommacroscopictonanoscopicscales,are
presented.Informationonthemorphology,theelementarycomposition
andthecrystallinestructurethateachmethodallowsfordetermining
theconstituentsofthecorrosionlayersisexamined,aswellastheir
limitsintermsofset-up,spatialanddetectionresolution.Thischapter
discussesthecharacteristicsofthescientifictoolsthatcanbeusedto
understandcorrosionphenomena,bytakingintoaccountthemajor
parametersresponsibleforalterationmechanisms.
Keywords:metalcorrosion,culturalheritage,multi-scaleanalysis,
macro-micro-nanometriccharacterisation.
4.1Introduction
Corrosionisawidespreadphenomenoninmetallicheritageartefacts.In
somecases,layersofcorrosionareintentionallyproducedinorderto
achieveparticularvisualeffectsinanartpiece.Thisismostlyencountered
onbronzeandcuprousalloys,coveringtheartefactswitharangeofcolour-
fulandchemicallystablecorrosionlayers,throughtheuseofchemical
preparations[1].Inmostcases,however,corrosionis
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