Naslov
New approach in corrosion protection based on the use of waterborne coating

Autori
Kapitanović, Angela ; Otmačić Ćurković, Helena

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

Izvornik
11th ISE Satellite Student Regional Symposium on Electrochemistry / Novosel, N. ; Radić, G. - Zagreb : Hrvatsko društvo kemijskih inženjera i tehnologa (HDKI), 2022, 2-2

ISBN
978-953-6894-82-6

Skup
11th ISE Satellite Student Regional Symposium on Electrochemistry

Mjesto i datum
Zagreb, Hrvatska, 01.07.2022

Vrsta sudjelovanja
Predavanje

Vrsta recenzije
Domaća recenzija

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

Sažetak
Bronze objects of art placed outside are susceptible to corrosion under the influence of aggressive compounds. Consequently they are covered with layer of corrosion products called patina. Formation of natural patina is long term process which depends on the amount of corrosion compounds in the environment. That is the reason why conservation profession is using artificial patination instead. Artificial patina is very reactive and does not provide high level of corrosion protection. That is the reason why conservation ethics is responsible for additional preservation of mentioned objects. Presently used organic solvent coatings are being replaced with waterborne coatings due to their harmful effect on environment. Even though waterborne coatings are not toxic, their level of corrosion protection is still lower than organic counterpart. One way of improving it, is through combination with self- assembled monolayers of phosphonic acid. Monolayers are modifying substrate surface and ensure better bonding between metal and coating. The aim of this study is examining the level of protection of commercial waterborne coating on artificial sulphide patina on RG7 and CuSn6 bronze. Furthermore, corrosion protection is improved by pretreatment of patinated samples with self-assembled monolayers of the phosphonic acid. The influence of bronze composition is examined. Electrochemical properties are investigated using electrochemical impedance spectroscopy (EIS) in artificial acid rain (pH 5). Obtained results were compared with and without acid pretreatment. The structure of formed layers is confirmed with Fourier transform infrared spectroscopy (FTIR).

Izvorni jezik
Engleski

Znanstvena područja
Kemijsko inženjerstvo

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