Naslov
Influence of the number of double bonds in fatty acids crosslinked on copper on its corrosion inhibition in atmospheric conditions

Autori
Marušić, Katarina ; Matijaković, Nives ; Kralj, Damir ; Mihaljević, Branka

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

Izvornik
NUTECH-2020 International Conference on Development and Applications of Nuclear Technologies Conference Abstracts & Programme / - Varšava : Nstytut Chemii i Techniki Jadrowej, 2020, 111-111

Skup
NUTEC-2020 International Conference on Development and Applications of Nuclear Technologies

Mjesto i datum
Varšava, Poljska, 04.10.2020. - 07.10.2020

Vrsta sudjelovanja
Poster

Vrsta recenzije
Međunarodna recenzija

Ključne riječi
ionizing radiation ; corrosion protection ; coatings ; radiation technology

Sažetak
Copper is a malleable and ductile metal which is a very good conductor of both heat and electricity. Copper has low chemical reactivity. In moist air it slowly forms a greenish surface film called patina which protects the metal from further attack. Because of its advantages copper has a wide range of applications. To prolong the lifetime of copper made objects its surface is treated by different coatings, which are often not safe for the environment. Due to this reason new protective coatings are being developed for application on copper. Fatty acids are long chain molecules and non- toxic compounds with an affinity for self- assembling on metals. Once self-assembled on its surface the metal becomes hydrophobic. Thus, by blocking access for water to the surface the dissolution of the metal is disabled. If the fatty acid is unsaturated the film can be crosslinked by the use of gamma irradiation. Crosslinking makes the film more durable and stable. The protective efficiency of coatings developed this way depends on the type of fatty acid used, preparation conditions and environment the metal is exposed to. In this work the protective efficiency of coatings prepared from two different unsaturated fatty acids is compared: elaidic and linoelaidic acid. Both compounds are unsaturated trans fatty acids with 18 carbon atoms, where elaidic has one, while linoelaidic acid has two double bonds. The developed coatings were characterized by FTIR and goniometry. Their protective properties were investigated by electrochemical methods (potentiodynamic polarization and electrochemical impedance spectroscopy) in a solution simulating urban atmospheres. The optimal conditions for crosslinking were determined and the properties of the obtained coatings, as well as the properties of the non- crosslinked coatings were compared. The results have shown that both coatings offer good protective properties to copper in atmospheric conditions. For successful crosslinking a larger irradiation dose is needed in the case of linolelaidic acid.

Izvorni jezik
Engleski

Znanstvena područja
Kemija, Kemijsko inženjerstvo

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