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Application of Self-Assembled Monolayers of Long- Chain Organic Acids in the Corrosion Protection of Bronze (CROSBI ID 680880)

Prilog sa skupa u zborniku | sažetak izlaganja sa skupa | međunarodna recenzija

Mikić, Dajana ; Otmačić Ćurković, Helena Application of Self-Assembled Monolayers of Long- Chain Organic Acids in the Corrosion Protection of Bronze // Metal 2019, PROCEEDINGS OF THE INTERIM MEETING OF THE ICOM-CC METALS WORKING GROUP / Chemello, Claudia ; Brambilla, Laura ; Joseph, Edith (ur.). International Council of Museums – Committee for Conservation and Haute Ecole Arc Conservation-restauration, 2019. str. 458-458

Podaci o odgovornosti

Mikić, Dajana ; Otmačić Ćurković, Helena

engleski

Application of Self-Assembled Monolayers of Long- Chain Organic Acids in the Corrosion Protection of Bronze

One of the challenges today’s chemical engineers face is to find environmentally and economically acceptable solutions to protect against metal corrosion. With regard to bronze sculptures, this challenge is even greater due to the special requirements of the conservation and restoration profession and the necessity to preserve a sculpture’s original appearance. Taking all of these requirements into account, the great potential for application in this field are self-assembled monolayers of long-chain organic acids that are formed by adsorption of acid on the surface of oxide-covered metal, resulting in an acid-base reaction between metal oxide and acid. This reaction is followed by the self- organization of alkyl chains that creates a very thin and compact protective film on the metal surface, thus preventing the penetration of water molecules and aggressive ions. The aim of this work was to examine the efficiency of self-assembled monolayers of 16- phosphonohexadecanoic acid (COOH-PA), obtained using various preparation methods, in protecting bronze surfaces. In addition, the ability of self-assembled monolayers to improve adhesion between transparent organic coatings (Paraloid B- 72) and bronze surfaces was also investigated. Electrochemical measurements were conducted to test the protective properties of COOH-PA monolayers on bronze surfaces using linear polarization and electrochemical impedance spectroscopy. These measurements were carried out in simulated acid rain (0.2 g/L NaNO3 + 0.2 g/L Na2SO4 + 0.2 g/L NaHCO3 at pH 5) to replicate the kind of rain common in urban atmospheres. In addition to electrochemical testing, the properties of the protective films obtained were examined by infrared spectroscopy analysis with Fourier signal transformation, goniometry, and scanning electron microscopy.

bronze, corrosion, self-assembled monolayers

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Podaci o prilogu

458-458.

2019.

objavljeno

Podaci o matičnoj publikaciji

Metal 2019, PROCEEDINGS OF THE INTERIM MEETING OF THE ICOM-CC METALS WORKING GROUP

Chemello, Claudia ; Brambilla, Laura ; Joseph, Edith

International Council of Museums – Committee for Conservation and Haute Ecole Arc Conservation-restauration

978-92-9012-458-0

Podaci o skupu

28th International Conference on Metallurgy and Materials (METAL 2019)

poster

02.09.2019-06.09.2019

Neuchâtel, Švicarska

Povezanost rada

Kemijsko inženjerstvo