Naslov
Coating adhesion enhancement with long-chain phosphonic acid

Autori
Mikić, Dajana ; Otmačić Ćurković, Helena

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

Izvornik
Eurocorr 2021 / - , 2021

Skup
Annual corrosion congress Eurocorr: Materials science and advanced technologies for better corrosion protection (EUROCORR 2021)

Mjesto i datum
Online, 20.09.2021. - 24.09.2021

Vrsta sudjelovanja
Poster

Vrsta recenzije
Međunarodna recenzija

Ključne riječi
coatings, bronze, electrochemical methods

Sažetak
One of the main reasons for coating failure is loss of adhesion. In this work it was investigated how self-assembled monolayers (SAMs) of long-chain organic acid can improve coating adhesion to the bronze substrate. SAMs are highly ordered assemblies that have found application in numerous fields. Some advantages of such layers are formation on rough, irregular and hard-to-reach surfaces, cost-effectiveness as small amounts of material are needed to cover very large areas and low environmental pollution. SAM consists of three parts. First is a headgroup, which participates in bonding with metal substrate.Second one is a long alkyl chain, which participates in the van der Waals interactions and represents the barrier to aggressive ions towards themetal surface. And the third one is a terminal group that dictates the surface properties. With appropriate choice of terminal group adhesion of the coating applied on the SAM modified metallic substrate can be enhanced. In this work the influence of 16-phosphonohexadecanoic acid (COOH-PA) monolayers on the bronze surface and its impact on coating adhesion is examined. Electrochemical measurements used for testing are 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) which simulates the rain in urban atmosphere. In addition to electrochemical testing, the properties of obtained films are examined by infrared spectroscopy analysis with Fourier signal transformation, goniometry and scanning electron microscopy.

Izvorni jezik
Engleski

Znanstvena područja
Kemijsko inženjerstvo

POVEZANOST RADA