A non-destructive in-situ approach to monitor corrosion inside historical brass wind instruments

Elsener, Bernhard; Alter, M. E.; Lombardo, Tiziana; Ledergerber, M.; Wörle, Marie; Cocco, F.; Fantauzzi, Marzia; Palomba, S.; Rossi, Antonella

doi:10.1016/j.microc.2015.10.027

Cited by 21 publications

(24 citation statements)

References 4 publications

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“…In order to exclude a corrosive interaction between the solution in the sensor and the brass artefact, a short contact time (< 10 min) and a low chloride concentration of 10 −3 M NaCl have been chosen for the routine application of the sensor. A similar sensor in tubular form with a small balloon to press the sensor against the inside of the instruments has been tested on brass wind instruments . This might provide the instantaneous corrosion rate data of brass historical instruments, necessary to judge the validity of the conservation approach .…”

Section: Discussionmentioning

confidence: 99%

“…). A further development consisted in a tubular sensor mounted on a thin plastic tube in order to insert the sensor in the brass instruments . This sensor was pressed against the inside of the brass tuning slides by a small balloon that can be inflated by air pressure and released after the measurements.…”

Section: Methodsmentioning

confidence: 99%

“…The sensor should give stable and reliable results of the electrochemical measurements and should not alter the surface morphology and composition of the brass alloys. In this work, the development of the sensor, the tests in order to define a non‐aggressive solution in the sensor sponge and the comparison with measurements in a traditional electrochemical cell are reported as a “proof of concept” for future measurements inside historical instruments . A mechanistic interpretation based on the influence of surface oxidation on the oxygen reduction current is provided.…”

Section: Introductionmentioning

confidence: 99%

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Determination of the corrosion rate inside historical brass wind instruments – Proof of concept

Elsener

Cocco²,

Fantauzzi³

et al. 2016

Materials & Corrosion

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An electrochemical sensor has been tested on brass reference samples and applied on a mouthpiece of a historical brass instrument. Using a phosphate buffer solution pH 7 with 10−2, 10−3 and 10−4 M NaCl, the electrochemical response (open circuit potential, polarisation resistance) of the sensor corresponds to the results obtained in a traditional electrochemical cell. XPS surface analysis has shown that the brass surface composition after 7 min contact with the sensor is not altered when using 10−3 or 10−4 M NaCl. The sensor is fit for purpose and has already been applied in brass wind instruments.

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Section: Discussionmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Determination of the corrosion rate inside historical brass wind instruments – Proof of concept

Elsener

Cocco²,

Fantauzzi³

et al. 2016

Materials & Corrosion

Self Cite

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“…With a similar idea to Letardi's contact probe, Elsener and co‐workers have recently proposed a sensor to monitor corrosion in the inside of historical brass instruments ,. This sensor uses an Ag/AgCl solid‐state reference electrode and a platinum grid counter electrode embedded in a thin sponge.…”

Section: Instrumentation Developments For In Situ Eis Measurement In mentioning

confidence: 99%

In Situ Electrochemical Impedance Spectroscopy Measurements and their Interpretation for the Diagnostic of Metallic Cultural Heritage: A Review

Barat

Cano

2018

ChemElectroChem

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Protecting metallic cultural heritage from corrosion is a major challenge for metal conservators. Electrochemical techniques offer a great potential for monitoring the conservation condition of this type of heritage, providing a powerful tool for designing conservation strategies. For this reason, the application of techniques such as electrochemical impedance spectroscopy (EIS) has aroused increasing interest in recent years, although some difficulties in application and interpretation of the results still keep it from being routine practice. This Review aims to picture the state-of-the-art of using electrochemical impedance spectroscopy (EIS) for the in situ monitoring of metallic cultural heritage, focusing on spectra interpretation and different approaches that have been proposed to perform field measurements since the 1990's. In the first part of the Review, different cell designs based on the use of liquid or solid electrolytes for in situ measurements are reviewed. In the second part, a few general equivalent circuits are proposed as a basis for interpreting results on different metal surfaces after discussing different models proposed in literature. This overview intends to summarize and clarify the key points in the use of EIS, and encourage the use of this and other electrochemical techniques in the field of conservation science, for a better preservation of our cultural heritage.

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“…The goal was achieved using a miniaturized electrochemical cell that could be used outside but especially inside the tuning slides of the artifacts (Elsener et al, 2016b). Firstly, the work (Elsener et al, 2016b) has involved the development of the electrochemical sensor and subsequently its calibration; afterward the sensor has been applied on reference materials and then used on the historical brass musical instruments (Elsener et al, 2016a). Unfortunately, the surface state inside the tuning slides is unknown and it is difficult to find a technique able to characterize for instance the inside surface of the trumpets.…”

Section: Introductionmentioning

confidence: 99%

Model Protective Films on Cu-Zn Alloys Simulating the Inner Surfaces of Historical Brass Wind Instruments by EIS and XPS

et al. 2020

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The present work focuses on the characterization of brass surfaces after contact with artificial saliva solution at pH 7.4 and phosphate buffer solution at pH 7 simulating two extreme conditions that might occur when playing ancient brass wind instruments in the context of historically informed performance practice. The composition and the morphology of the film formed following the contact with the solutions for 1, 3, and 16 h were investigated by ex situ X-ray photoelectron spectroscopy (XPS) and scanning electron microscopy (SEM) to shed a light on the surface changes upon time. In situ electrochemical impedance spectroscopy (EIS) was used to study the mechanism of corrosion and protection of the alloys. The results could be interpreted using a reliable equivalent electrical circuit; they provided evidence that the alloys behave differently when in contact to the various solutions. In saliva solution the formation on the brass surface of a thick surface film was observed, composed of crystallites of about 200 nm size mainly composed of CuSCN and Zn 3 (PO 4) 2. This layer hinders the alloy dissolution. The contact of the alloys with the buffer solution originated a much thinner layer composed of Cu 2 O, ZnO, and a small amount of Zn 3 (PO 4) 2. This film is rapidly formed and does not evolve upon time in a protective film.

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A non-destructive in-situ approach to monitor corrosion inside historical brass wind instruments

Cited by 21 publications

References 4 publications

Determination of the corrosion rate inside historical brass wind instruments – Proof of concept

Determination of the corrosion rate inside historical brass wind instruments – Proof of concept

In Situ Electrochemical Impedance Spectroscopy Measurements and their Interpretation for the Diagnostic of Metallic Cultural Heritage: A Review

Model Protective Films on Cu-Zn Alloys Simulating the Inner Surfaces of Historical Brass Wind Instruments by EIS and XPS

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