Naslov
Applicability of the paste electrolyte cell for the evaluation of atmospheric corrosion of cultural heritage metals

Autori
Šoljić, Ines ; Martinez, Sanja

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

Izvornik
Eurocorr 2022 / - , 2022, 1-1

Skup
EUROCORR 2022: Corrosion in a Changing World – Energy, Mobility, Digitalization

Mjesto i datum
Berlin, Njemačka, 28.08.2022. - 01.09.2022

Vrsta sudjelovanja
Poster

Vrsta recenzije
Međunarodna recenzija

Ključne riječi
EIS ; paste electrolyte ; atmospheric corrosion

Sažetak
Various electrochemical techniques can be used to obtain information about the condition of metallic cultural artefacts during the exposure to outdoor atmosphere in situ. Electrochemical impedance spectroscopy (EIS) as a widely spread corrosion evaluation tool is one of them. The challenges of its application in the field are well known. One approach to solving these challenges is the application of the paste electrolyte cell. This approach is used in this study for EIS testing of leading (copper, bronze, zinc, Cor-Ten) and modern (aluminium, stainless steel) cultural heritage metals exposed to urban atmospheric environment. Two surface treatments of copper and zinc, five surface treatments of bronze, and one surface treatment of Cor-Ten are used to compare the natural and artificially applied patinas and the effectiveness of the applied coatings. The corrosion behaviour of aluminium and anodized aluminium and two types of stainless steel are also compared. This results in a total of 18 cases, which are initially characterized by EIS measurements in 3.5% NaCl solution, tap water, simulated rainwater and the aforementioned electrolyte paste cell (QCQ method). According to ASTM G50, untreated and treated metal specimens are exposed to the external corrosive environment. Exposure conditions (humidity and temperature) are monitored and specimens are periodically characterised using spectroscopic techniques. Corrosion behaviour is monitored over a six-month period using the non-destructive QCQ method, which shows promise for on-site measurements of cultural heritage objects without compromising their integrity.

Izvorni jezik
Engleski

Znanstvena područja
Kemijsko inženjerstvo, Temeljne tehničke znanosti

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