Naslov
Preparation and Characterization of Artificial Patina on Bronze

Autori
Kapitanović, Angela ; Brkić, Lana ; Pintarić, Helena ; Mikić, Dajana ; Otmačić Ćurković, Helena

Vrsta, podvrsta i kategorija rada
Radovi u zbornicima skupova, cjeloviti rad (in extenso), znanstveni

Izvornik
Proceedings Book, 19th International Foundrymen Conference, / Dolić, Natalija ; Zovko Brodarac, Zdenka ; Brajčinović, Sandra - Sisak : Metalurški fakultet Sveučilišta u Zagrebu, 2021, 325-337

Skup
19th International Foundrymen Conference Humans – Valuable Resource for Foundry Industry Development

Mjesto i datum
Split, Hrvatska, 16.06.2021. - 18.06.2021

Vrsta sudjelovanja
Poster

Vrsta recenzije
Međunarodna recenzija

Ključne riječi
artificial patina ; bronze ; atmospheric corrosion ; electrochemical methods

Sažetak
Numerous bronze objects and works of art are exposed to outdoor atmosphere that causes the formation of patina. Patina creates a protective layer that slows down further corrosion processes. The composition of patina will determine its protective properties as well as its color. The formation of natural patina can take years, but also it can be formed artificially, by chemical and thermal treatment of the surface. Therefore, the application of artificial patina has become a very common form of protection of bronze artefacts. The aim of this work was to examine morphological and electrochemical properties as well as chemical composition of artificial patina formed on CuSn6 alloy. Chemical patina was formed by using sulfide solution to induce corrosion processes, while electrochemical patina was synthesized by polarization of bronze electrodes in an artificial rain solution. The samples were exposed either to urban outdoor atmosphere or artificial rain solution, after which the composition and structural properties were investigated by attenuated total reflectance Fourier transform infrared spectroscopy (ATR-FTIR), optical microscopy (OM) and scanning electron microscopy (SEM). Electrochemical properties were examined by electrochemical impedance spectroscopy (EIS). The results showed an increase in the impedance modulus with the exposure time, i.e., higher corrosion resistance, which confirms the protective effect of the patina. Morphological results show that the surface of the chemical patina obtained by spraying method is the most homogeneous.

Izvorni jezik
Engleski

Znanstvena područja
Kemijsko inženjerstvo, Temeljne tehničke znanosti

POVEZANOST RADA