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Theses

Croissance et propriétés des couches d'oxydation et des patines à la surface d'alliages cuivreux d'intérêt archéologique ou artistique

Abstract : Surface layers grown by oxidation or corrosion onto copper-based objects belonging to the cultural heritage are often rich of important information concerning the object original aspect, the abandonment circumstances and the conservation state. They are often of complex nature and structure. Their complete analysis is difficult because it is submitted to severe preservation constraints.
This thesis concerns high temperature oxidation layers and intentional antique patina grown on the surface of copper-base alloys.
Non-destructive analysis methods and experimental devices best adapted to that problematic have been specifically developed, mostly based on ion beam analyses.
High temperature oxidation of the copper-tin system have been comprehensively studied: nature of the layers, growth kinetic and reaction mechanisms. A model have been proposed which takes into account the experimental observations and the inhibiting effect of tin addition.
The antique intentional patina obtained through chemical surface treatment done by the craftsmen in order to modify the surface colour and aspect of the metal have been also studied. A corpus of objects from national museums, produced during a period of 2000 years from the antique Egypt to the Roman Empire, have been analysed.
These analyses allowed to sensibly increase the literature data on this kind of objects and this kind of practice. Laboratory analogues have been elaborated through the experimentation of various reported recipes. The results on archaeological objects and laboratory experimentation lead to significant progress in the knowledge of these particular oxide layers, and also in the field of the history of techniques and stylistic history in the Mediterranean antiquity.
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https://tel.archives-ouvertes.fr/tel-00011255
Contributor : François Mathis <>
Submitted on : Thursday, December 22, 2005 - 10:49:47 AM
Last modification on : Thursday, June 25, 2020 - 2:54:03 PM
Long-term archiving on: : Tuesday, April 6, 2010 - 4:32:46 PM

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  • HAL Id : tel-00011255, version 1

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François Mathis. Croissance et propriétés des couches d'oxydation et des patines à la surface d'alliages cuivreux d'intérêt archéologique ou artistique. Matériaux. Université Paris Sud - Paris XI, 2005. Français. ⟨tel-00011255⟩

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