Molybdate and vanadate ions as corrosion inhibitors for clad aluminium alloy 2024-T3

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

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.

• Jezik: Angleški jezik
• Ključne besede: molybdate, corrosion inhibitors, aqueous chemistry, aluminium alloy, clad AA2024-T3, vanadate, XPS, SEM
• Vrsta gradiva: Članek v reviji
• Tipologija: 1.01 - Izvirni znanstveni članek
• Organizacija: FKKT - Fakulteta za kemijo in kemijsko tehnologijo
• Status publikacije: Objavljeno
• Različica publikacije: Objavljena publikacija
• Leto izida: 2024
• Št. strani: 21 str.
• Številčenje: Vol. 504, art. 144893
• PID: 20.500.12556/RUL-160331
• UDK: 54
• ISSN pri članku: 1873-3859
• DOI: 10.1016/j.electacta.2024.144893
• COBISS.SI-ID: 205238275
• Datum objave v RUL: 26.08.2024

Gradivo je del revije

• Naslov: Electrochimica acta
• Založnik: Elsevier, International Society of Electrochemistry
• ISSN: 1873-3859
• COBISS.SI-ID: 135479555

Licence

• Licenca: CC BY-NC 4.0, Creative Commons Priznanje avtorstva-Nekomercialno 4.0 Mednarodna
• Povezava: http://creativecommons.org/licenses/by-nc/4.0/deed.sl
• Opis: Licenca Creative Commons, ki prepoveduje komercialno uporabo, vendar uporabniki ne rabijo upravljati materialnih avtorskih pravic na izpeljanih delih z enako licenco.

Sekundarni jezik

• Jezik: Slovenski jezik
• Ključne besede: aluminijeve zlitine, vanadati, protikorozijska zaščita, vrstična elektronska mikroskopija, rentgenska fotoelektronska spektroskopija