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Molybdate and vanadate ions as corrosion inhibitors for clad aluminium alloy 2024-T3
ID
Milošev, Ingrid
(
Author
),
ID
Pavlovčič, Tjaša
(
Author
),
ID
Tomšič, Matija
(
Author
)
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https://www.sciencedirect.com/science/article/pii/S0013468624011319
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Abstract
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.
Language:
English
Keywords:
molybdate
,
corrosion inhibitors
,
aqueous chemistry
,
aluminium alloy
,
clad AA2024-T3
,
vanadate
,
XPS
,
SEM
Work type:
Article
Typology:
1.01 - Original Scientific Article
Organization:
FKKT - Faculty of Chemistry and Chemical Technology
Publication status:
Published
Publication version:
Version of Record
Year:
2024
Number of pages:
21 str.
Numbering:
Vol. 504, art. 144893
PID:
20.500.12556/RUL-160331
UDC:
54
ISSN on article:
1873-3859
DOI:
10.1016/j.electacta.2024.144893
COBISS.SI-ID:
205238275
Publication date in RUL:
26.08.2024
Views:
133
Downloads:
47
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Record is a part of a journal
Title:
Electrochimica acta
Publisher:
Elsevier, International Society of Electrochemistry
ISSN:
1873-3859
COBISS.SI-ID:
135479555
Licences
License:
CC BY-NC 4.0, Creative Commons Attribution-NonCommercial 4.0 International
Link:
http://creativecommons.org/licenses/by-nc/4.0/
Description:
A creative commons license that bans commercial use, but the users don’t have to license their derivative works on the same terms.
Secondary language
Language:
Slovenian
Keywords:
aluminijeve zlitine
,
vanadati
,
protikorozijska zaščita
,
vrstična elektronska mikroskopija
,
rentgenska fotoelektronska spektroskopija
Projects
Funder:
ARIS - Slovenian Research and Innovation Agency
Project number:
P2-0393
Name:
Napredni materiali za nizkoogljično in trajnostno družbo
Funder:
ARIS - Slovenian Research and Innovation Agency
Project number:
P1-0201
Name:
Fizikalna kemija
Funder:
ARIS - Slovenian Research and Innovation Agency
Project number:
N1-0308
Name:
Nanoplastika v vodnem okolju: struktura, migracija, transport in sanacija
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