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.
|Titolo:||Depletion Gilding: An Ancient Method for Surface Enrichment of Gold Alloys|
|Data di pubblicazione:||2016|
|Appare nelle tipologie:||1.1 Articolo in rivista|