Ingrid Milošev (Avtor), Tjaša Pavlovčič (Avtor), Matija Tomšič (Avtor)

Povzetek

Molybdate and vanadate ions were used as corrosion inhibitors for the clad aluminium alloy 2024-T3 in chloride solution to investigate the differences in their inhibitory effect. Electrochemical measurements in 0.1 M NaCl investigated the influence of inhibitor concentration from 0.5 mM to 250 mM, solution pH from 5 to 9 and immersion time at open circuit potential of up to 12 h. Both compounds act predominantly as anodic inhibitors; however, the effect of molybdate increases significantly at concentrations above 50 mM and leads to a broad passive range. Surface analysis of the samples exposed to inhibitor performed by X-ray photoelectron spectroscopy showed that the inhibitor layers consist of oxides of multiple valences. Scanning electron microscopy with chemical analysis was also used to characterise the inhibitor layers. Equilibrium diagrams of the aqueous species in the selected concentration range were generated to better understand the inhibition mechanism and to correlate the electrochemical data and data on surface properties.

Ključne besede

molybdate;corrosion inhibitors;aqueous chemistry;

Podatki

Jezik: Angleški jezik
Leto izida:
Tipologija: 1.01 - Izvirni znanstveni članek
Organizacija: IJS - Institut Jožef Stefan
Založnik: Elsevier
UDK: 54
COBISS: 205238275 Povezava se bo odprla v novem oknu
ISSN: 1873-3859
Št. ogledov: 143
Št. prenosov: 44
Ocena: 0 (0 glasov)
Metapodatki: JSON JSON-RDF JSON-LD TURTLE N-TRIPLES XML RDFA MICRODATA DC-XML DC-RDF RDF

Ostali podatki

Sekundarne ključne besede: Aluminijeve zlitine;Vanadati;Protikorozijska zaščita;Vrstična elektronska mikroskopija;Rentgenska fotoelektronska spektroskopija;
Vrsta dela (COBISS): Članek v reviji
Komentar vira: Nasl. z nasl. zaslona; Opis vira z dne 26. 8. 2024;
Strani: str. 1-21
Zvezek: ǂVol. ǂ504, [article no.] 144893
Čas izdaje: Nov. 2024
DOI: 10.1016/j.electacta.2024.144893
ID: 26235552