We present here the results so far achieved in the framework of the EUARTECH project, concerning the evaluation of innovative treatments used to preserve outdoor bronze. Traditional coatings, such as Incralac and/or synthetic waxes (R21, TeCe Wachs 3534F), were compared with different organo-silanes materials. In order to evaluate their effectiveness, applications were made on urban natural aged copper plates and also on parts of a work of art: the sceptre of the equestrian bronze statue of Bartolomeo Colleoni, in Venice. Electron impedance spectroscopy (EIS), ATR mapping FTIR microscopy and colorimetric measurements were performed after an 8-months exposure. The results clearly demonstrate how the corrosion resistance of some of the new tested treatments has the same order of magnitude of those commonly used at present, with the great advantage of having no modification in the colour appearance of the treated patina.
Innovative Treatments for the Protection of Outdoor Bronze Monuments / E.Joseph; P.Letardi; R.Mazzeo; S.Prati; M.Vandini. - STAMPA. - (2007), pp. 71-77. (Intervento presentato al convegno Metal 2007: interim meeting of the ICOM-CC Metal WG tenutosi a Amsterdam nel 17-21 September 2007).
Innovative Treatments for the Protection of Outdoor Bronze Monuments
JOSEPH, EDITH MICHELLE MARYSE;MAZZEO, ROCCO;PRATI, SILVIA;VANDINI, MARIANGELA
2007
Abstract
We present here the results so far achieved in the framework of the EUARTECH project, concerning the evaluation of innovative treatments used to preserve outdoor bronze. Traditional coatings, such as Incralac and/or synthetic waxes (R21, TeCe Wachs 3534F), were compared with different organo-silanes materials. In order to evaluate their effectiveness, applications were made on urban natural aged copper plates and also on parts of a work of art: the sceptre of the equestrian bronze statue of Bartolomeo Colleoni, in Venice. Electron impedance spectroscopy (EIS), ATR mapping FTIR microscopy and colorimetric measurements were performed after an 8-months exposure. The results clearly demonstrate how the corrosion resistance of some of the new tested treatments has the same order of magnitude of those commonly used at present, with the great advantage of having no modification in the colour appearance of the treated patina.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
