Archivio Istituzionale della RicercaAncient objects made of noble metal alloys, that is, gold with copper and/or silver, can show the phenomenon of surface enrichment. This phenomenon is regarding the composition of the surface, which has a percentage of gold higher than that of the bulk. This enrichment is obtained by a depletion of the other elements of the alloy, which are, in some manner, removed. This depletion gilding process was used by pre-Columbian populations for their “tumbaga”, a gold-copper alloy, to give it the luster of gold.
Depletion Gilding: An Ancient Method for Surface Enrichment of Gold Alloys / Sparavigna, Amelia Carolina. - In: MECHANICS, MATERIALS SCIENCE & ENGINEERING JOURNAL. - ISSN 2412-5954. - STAMPA. - 2016:(2016), pp. 98-105.
Depletion Gilding: An Ancient Method for Surface Enrichment of Gold Alloys
Amelia Carolina Sparavigna
2016
Abstract
Ancient objects made of noble metal alloys, that is, gold with copper and/or silver, can show the phenomenon of surface enrichment. This phenomenon is regarding the composition of the surface, which has a percentage of gold higher than that of the bulk. This enrichment is obtained by a depletion of the other elements of the alloy, which are, in some manner, removed. This depletion gilding process was used by pre-Columbian populations for their “tumbaga”, a gold-copper alloy, to give it the luster of gold.
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https://hdl.handle.net/11583/2778733