Naslov
Multi-criteria evaluation of self-protecting waterborne coating based on mesoporous silica nanoparticles in corrosion environment

Autori
Stojanović, Ivan ; Židov, Bruno ; Alar, Vesna ; Šimunović, Vinko

Vrsta, podvrsta i kategorija rada
Radovi u zbornicima skupova, cjeloviti rad (in extenso), znanstveni

Izvornik
Eurocorr 2019 / - Sevilla : Sociedad Española des Materiales (SOCIEMAT), Eurocorr 2019, 2019, 1-8

Skup
European Corrosion Congress EUROCORR 2019: New times, new materials, new corrosion challenges

Mjesto i datum
Sevilla, Španjolska, 09.09.2019. - 13.09.2019

Vrsta sudjelovanja
Poster

Vrsta recenzije
Međunarodna recenzija

Ključne riječi
self-protecting coatings ; corrosion resistance ; mesoporous silica nanoparticles ; inhibitors

Sažetak
The self-protecting composite system, which is proposed in this paper, consists of encapsulated corrosion inhibitor that is dispersed within a waterborne coating. The mesoporous silica nanoparticles served as a host for two different corrosion inhibitors, 8- Hydroxyquinoline and 1- hydroxybenzotriazole. Such nanoparticle composites were embedded in the waterborne epoxy coating in two different concentrations and applied to the steel test substrates. The concentrations of nanoparticles in the final cured coatings were calculated to be 0.69 wt% and 0.35 wt% for each inhibitor. Electrochemical impedance spectroscopy, open circuit potential measurement, humidity chamber and salt spray chamber testing followed by adhesion testing were used to investigate the protective properties of the composite coatings. Results showed higher corrosion resistance of the coatings embedded with the nanoparticles containing inhibitors, in comparison with the coating without nanoparticles. Release of the inhibitor from nanoparticles in response to corrosion damage were recorded during immersion in the NaCl media. Samples containing 1- hydroxybenzotriazole showed the best corrosion resistance properties during the test period. The percentage loss of adhesion properties after humidity chamber testing is similar for all samples but is more pronounced for samples containing nanoparticles after salt spray chamber testing.

Izvorni jezik
Engleski

Znanstvena područja
Kemijsko inženjerstvo, Strojarstvo

POVEZANOST RADA