Archivio Istituzionale della Ricercapaper 9626 - The protective effectiveness of bronze patinas can be evaluated using electrochemical impedance spectroscopy (EIS). However, EIS, a well-established method to investigate metal coatings for general purposes, requires to perform the measurement in an electrolytic solution that may alter the surface of an artefact of archaeological or artistic interest, furthermore the need of evaluating and monitoring the conservation state of irremovable artefacts, is not satisfied by the widely employed EIS laboratory instruments. In this work, a portable impedance spectroscopy analyzer equipped with a specially designed dry- probe, that avoids the use of the electrolyte, is proposed for the evaluation of the protective effectiveness of surface layers of metallic cultural heritage artefacts. The overall system has been tested on different kinds of patinas, synthetized from sulphate and nitrate solutions on a Cu-Sn alloy, with the ultimate goal of establishing a procedure for the in situ assessment of bronzes of archaeological and artistic interest. The protective effectiveness of bronze patinas can be evaluated using electrochemical impedance spectroscopy (EIS). However, EIS, a well-established method to investigate metal coatings for general purposes, requires to perform the measurement in an electrolytic solution that may alter the surface of an artefact of archaeological or artistic interest, furthermore the need of evaluating and monitoring the conservation state of irremovable artefacts, is not satisfied by the widely employed EIS laboratory instruments. In this work, a portable impedance spectroscopy analyzer equipped with a specially designed dry- probe, that avoids the use of the electrolyte, is proposed for the evaluation of the protective effectiveness of surface layers of metallic cultural heritage artefacts. The overall system has been tested on different kinds of patinas, synthetized from sulphate and nitrate solutions on a Cu-Sn alloy, with the ultimate goal of establishing a procedure for the in situ assessment of bronzes of archaeological and artistic interest.
An impedance spectroscopy system for the in-situ assessment of the conservation state of archaeological bronzes / Angelini, EMMA PAOLA MARIA VIRGINIA; Corbellini, Simone; Ferraris, Franco; Grassini, Sabrina; Mao, Yangwu; Parvis, Marco. - (2010), pp. 1-7. (Intervento presentato al convegno Eurocorr 2010 - European Federation of Corrosion Event no. 324 tenutosi a Moscow (Russia) nel 13-17 September 2010).
An impedance spectroscopy system for the in-situ assessment of the conservation state of archaeological bronzes
ANGELINI, EMMA PAOLA MARIA VIRGINIA;CORBELLINI, SIMONE;FERRARIS, Franco;GRASSINI, Sabrina;MAO, YANGWU;PARVIS, Marco
2010
Abstract
paper 9626 - The protective effectiveness of bronze patinas can be evaluated using electrochemical impedance spectroscopy (EIS). However, EIS, a well-established method to investigate metal coatings for general purposes, requires to perform the measurement in an electrolytic solution that may alter the surface of an artefact of archaeological or artistic interest, furthermore the need of evaluating and monitoring the conservation state of irremovable artefacts, is not satisfied by the widely employed EIS laboratory instruments. In this work, a portable impedance spectroscopy analyzer equipped with a specially designed dry- probe, that avoids the use of the electrolyte, is proposed for the evaluation of the protective effectiveness of surface layers of metallic cultural heritage artefacts. The overall system has been tested on different kinds of patinas, synthetized from sulphate and nitrate solutions on a Cu-Sn alloy, with the ultimate goal of establishing a procedure for the in situ assessment of bronzes of archaeological and artistic interest. The protective effectiveness of bronze patinas can be evaluated using electrochemical impedance spectroscopy (EIS). However, EIS, a well-established method to investigate metal coatings for general purposes, requires to perform the measurement in an electrolytic solution that may alter the surface of an artefact of archaeological or artistic interest, furthermore the need of evaluating and monitoring the conservation state of irremovable artefacts, is not satisfied by the widely employed EIS laboratory instruments. In this work, a portable impedance spectroscopy analyzer equipped with a specially designed dry- probe, that avoids the use of the electrolyte, is proposed for the evaluation of the protective effectiveness of surface layers of metallic cultural heritage artefacts. The overall system has been tested on different kinds of patinas, synthetized from sulphate and nitrate solutions on a Cu-Sn alloy, with the ultimate goal of establishing a procedure for the in situ assessment of bronzes of archaeological and artistic interest.
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https://hdl.handle.net/11583/2397455
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