Naslov
Gentisic acid as inhibitor of Al-Mg alloy corrosion in chloride solution

Autori
Vrsalović, Ladislav ; Kliškić, Maja ; Radošević, Jagoda ; Gudić, Senka ; Smoljko, Ivana ;

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

Izvornik
2nd World Congress on Corrosion in the Military : Corrosion Protection through Innovation, Transformation and Strategic Corrosion Management : Book of abstracts / Agarwala, Vinod - Napulj : Citta della Sciencia s.c.p.a. ONLUS, 2007, 40-41

Skup
2nd World Congress on Corrosion in the Military : Corrosion Protection through Innovation, Transformation and Strategic Corrosion Management

Mjesto i datum
Napulj, Italija, 26.09.2007. - 29.09.2007

Vrsta sudjelovanja
Predavanje

Vrsta recenzije
Međunarodna recenzija

Ključne riječi
Al-2.5Mg alloy; corrosion inhibition; gentisic acid; rotating disc electrode

Sažetak
The polarisation techniques and impedance spectroscopy measurements have been used to determine the corrosion behaviour of the Al-2.5Mg alloy and the inhibition efficiency of gentisic acid as corrosion inhibitor in a 0.5 mol dm-3 NaCl solution. Gentisic acid is a phenolic acid whose presence has been established in the plant material. Measurements were performed on a rotating disc electrode in a quiescent solution and at different electrode rotation rates and electrolyte temperatures. The results obtained indicate that increase in electrode rotation rate and electrolyte temperature leads to a stronger corrosion attack on the alloy examined. The addition of gentisic acid inhibits corrosion of the Al-2.5Mg alloy, and the inhibition efficiency increases with increasing inhibitor concentration but decreases with increasing electrode rotation rate and electrolyte temperature. The investigated compound acts as a cathodic-type inhibitor and the inhibition is ascribed to the adsorption of the inhibitor onto the electrode surface. The adsorptive behaviour of gentisic acid follows the Freundlich adsorption isotherm.

Izvorni jezik
Engleski

Znanstvena područja
Kemijsko inženjerstvo

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