Naslov
Waterborne coating for bronze corrosion protection

Autori
Kapitanović, Angela ; Otmačić Ćurković, Helena

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

Izvornik
Eurocorr 2022. / - , 2022, 1-1

Skup
Eurocorr 2022.

Mjesto i datum
Berlin, Njemačka, 28.08.2022. - 01.09.2022

Vrsta sudjelovanja
Poster

Vrsta recenzije
Međunarodna recenzija

Ključne riječi
bronze ; waterborne coating ; self-assembled monolayers ; impedance

Sažetak
Cultural heritage objects are often made of bronze. When placed outdoors, they are prone to corrosion due to the presence of aggressive atmospheric compounds. As a result, they get covered with patina. The most common method for their protection is the use of Paraloid B-72, an acrylic varnish. Paraloid B-72 shows good protective properties but only for a relative short period of time. It contains an organic solvent, which can have a negative impact on the environment and human health. Legal regulations restrict the use of organic solvents, which led to the development of waterborne coatings. Their disadvantages are poor surface wetting, corrosion of the metal substrate and a lower level of protection. The aim of this research is to examine the possibility of bronze protection by an acrylic waterborne coating. In order to improve the corrosion protection of studied waterborne coating, self-assembled monolayers of long-chain phosphonic acids are formed on bronze surface prior to coating application. They can act as both adhesion promoters and corrosion inhibitors, as was previously observed in case of their combination with Paraloid B-72. Studies are conducted on bare and patinated bronze surfaces. The long-term corrosion behaviour of protected samples in simulated acid rain is studied by electrochemical impedance spectroscopy. The film structure and the surface composition are examined by Fourier transform infrared spectroscopy and scanning electron microscopy. Pull-off adhesion tests are conducted before and after exposure to corrosive medium in order to validate the influence of phosphonic acids on coating adhesion.

Izvorni jezik
Engleski

Znanstvena područja
Kemijsko inženjerstvo

POVEZANOST RADA