Naslov
Application of PVA hydrogel based electrolyte for electrochemical impedance spectroscopy measurements

Autori
Brkić, Lana ; Janković-Miloš, Lucija ; Otmačić Ćurković, Helena

Vrsta, podvrsta i kategorija rada
Sažeci sa skupova, sažetak, znanstveni

Izvornik
Croatian Society of Chemical Engineers / Novosel, Nives ; Radić, Gabrijela - Zagreb, 2022, 4-4

Skup
11th ISE Satellite Student Regional Symposium on Electrochemistry

Mjesto i datum
Zagreb, Hrvatska, 01.07.2022

Vrsta sudjelovanja
Predavanje

Vrsta recenzije
Nije recenziran

Ključne riječi
hydrogels ; PVA ; bronze cultural heritage ; EIS

Sažetak
Electrochemical impedance spectroscopy (EIS) is a widely used technique for corrosion studies which offers a great potential for monitoring the conservation condition of metallic cultural heritage [1, 2]. However, using a traditional three-electrode cell in a liquid electrolyte represents the main issue to the application of electrochemical measurements, due to irregular surface of metal sculptures and monuments. Overcoming these difficulties is the key to a successful implementation of EIS in the field and as one of the possible solutions to this problem replacement of the conventional electrolyte solution with a gel polymer electrolyte is presented. Application of hydrogel based electrolyte for EIS measurements opens up the possibility to carry out a punctual analysis of the artefact without compromising its surface. One of the most promising candidates for this application is hydrogel electrolyte based on poly (vinyl alcohol) (PVA) due to its low cost, green preparation, stability and high water content [3]. Therefore, the aim of this work was to conduct electrochemical impedance spectroscopy measurements using hydrogel electrolytes based on PVA. The experiments were carried out on different copper and bronze substrates-bare and corroded metal and metal protected by a thin and thick layer of coating. The results were obtained by measurements in two- and three-electrode cell configuration by using PVA prepared in two different electrolytes. Finally, the results were compared with results obtained in a traditional electrochemical cell.

Izvorni jezik
Engleski

Znanstvena područja
Kemijsko inženjerstvo

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