Naslov
Deposition of Cerium(III)-chloride heptahydrate on Aluminium Alloy 2024-T3 in Chloride Solution

Autori
Kurtela, Marin ; Alar, Vesna ; Šimunović, Vinko ; Jakovljević, Suzana

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

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
Aluminijska legura, inhibitor, cerij (III) klorid heptahidrat, kloridna otopina
(Aluminium alloy, inhibitor, cerium (III) chloride heptahydrate, chloride solution)

Sažetak
In the present work the corrosion protection of aluminium alloy AA2024-T3 has been studied in chloride solution with and without addition of cerium (III) chloride heptahydrate (CeCl3 X 7H2O). Inhibition efficiency as a function of concentration, temperature and exposure period of immersion (240 h) into 0.01 M NaCl, containing 3 mM, 4 mM and 5 mM of CeCl3 X 7H2O, are investigated at 20 °C, 40 °C and 60 °C. Quantitative tests performed include electrochemical techniques, such as method of quasi-potentiostatic polarization (Tafel extrapolation) to determine corrosion current density (jcorr), inhibition efficiency (η), and degree of surface coverage (ϑ). The kinetic and thermodynamic parameters of adsorption process, such as activation energy (EA), enthalpy of activation (ΔHa0), entropy of activation (ΔSa0), standard adsorption enthalpy (ΔHads0), standard adsorption entropy (ΔSads0) and the adsorption free energy (ΔGads0) were also determined. Adsorption of the cerium ions on the AA2024-T3 surface follows the Langmuir isotherm model.

Izvorni jezik
Engleski

Znanstvena područja
Kemijsko inženjerstvo, Strojarstvo, Zrakoplovstvo, raketna i svemirska tehnika

POVEZANOST RADA