The effect of pH on the corrosion protection of aluminum alloys in lithium-carbonate-containing NaCl solutions

E. Michailidou; P. Visser; J.M.C. Mol; A. Kosari; H.A. Terryn; K. Baert; Y. Gonzalez Garcia

doi:10.1016/j.corsci.2022.110851

The effect of pH on the corrosion protection of aluminum alloys in lithium-carbonate-containing NaCl solutions

E. Michailidou^*, P. Visser, J.M.C. Mol, A. Kosari, H.A. Terryn, K. Baert, Y. Gonzalez Garcia

^*Corresponding author for this work

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Abstract

The corrosion inhibiting effect of lithium carbonate has been studied over the pH range relevant for atmospheric corrosion conditions at the polymer/metal interface. It is demonstrated that lithium carbonate offers optimum corrosion protection under moderately alkaline conditions attributed to the formation of a protective layer identified as aluminum-lithium layered double hydroxide. It is proposed that an active-to-passive transition occurs in the presence of lithium carbonate under moderately alkaline conditions where anodic dissolution of the aluminum matrix is an important step prior to the formation of the protective layer. After prolonged exposure, the protective layer is uniformly formed on the surface of AA2024-T3 and lithium containing AA2198-T8 covering both the matrix and active intermetallic particles thus hindering further corrosion reactions.

Original language	English
Article number	110851
Number of pages	16
Journal	Corrosion Science
Volume	210
DOIs	https://doi.org/10.1016/j.corsci.2022.110851
Publication status	Published - 2023

Keywords

Aluminium
Lithium carbonate
Potentiodynamic polarisation
Raman Spectroscopy
SEM
Passivation

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10.1016/j.corsci.2022.110851

1-s2.0-S0010938X22007697-mainFinal published version, 7.46 MBLicence: CC BY

Cite this

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title = "The effect of pH on the corrosion protection of aluminum alloys in lithium-carbonate-containing NaCl solutions",

abstract = "The corrosion inhibiting effect of lithium carbonate has been studied over the pH range relevant for atmospheric corrosion conditions at the polymer/metal interface. It is demonstrated that lithium carbonate offers optimum corrosion protection under moderately alkaline conditions attributed to the formation of a protective layer identified as aluminum-lithium layered double hydroxide. It is proposed that an active-to-passive transition occurs in the presence of lithium carbonate under moderately alkaline conditions where anodic dissolution of the aluminum matrix is an important step prior to the formation of the protective layer. After prolonged exposure, the protective layer is uniformly formed on the surface of AA2024-T3 and lithium containing AA2198-T8 covering both the matrix and active intermetallic particles thus hindering further corrosion reactions.",

keywords = "Aluminium, Lithium carbonate, Potentiodynamic polarisation, Raman Spectroscopy, SEM, Passivation",

author = "E. Michailidou and P. Visser and J.M.C. Mol and A. Kosari and H.A. Terryn and K. Baert and {Gonzalez Garcia}, Y.",

year = "2023",

doi = "10.1016/j.corsci.2022.110851",

language = "English",

volume = "210",

journal = "Corrosion Science: the journal on environmental degradation of materials and its control",

issn = "0010-938X",

publisher = "Elsevier",

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TY - JOUR

T1 - The effect of pH on the corrosion protection of aluminum alloys in lithium-carbonate-containing NaCl solutions

AU - Michailidou, E.

AU - Visser, P.

AU - Mol, J.M.C.

AU - Kosari, A.

AU - Terryn, H.A.

AU - Baert, K.

AU - Gonzalez Garcia, Y.

PY - 2023

Y1 - 2023

N2 - The corrosion inhibiting effect of lithium carbonate has been studied over the pH range relevant for atmospheric corrosion conditions at the polymer/metal interface. It is demonstrated that lithium carbonate offers optimum corrosion protection under moderately alkaline conditions attributed to the formation of a protective layer identified as aluminum-lithium layered double hydroxide. It is proposed that an active-to-passive transition occurs in the presence of lithium carbonate under moderately alkaline conditions where anodic dissolution of the aluminum matrix is an important step prior to the formation of the protective layer. After prolonged exposure, the protective layer is uniformly formed on the surface of AA2024-T3 and lithium containing AA2198-T8 covering both the matrix and active intermetallic particles thus hindering further corrosion reactions.

AB - The corrosion inhibiting effect of lithium carbonate has been studied over the pH range relevant for atmospheric corrosion conditions at the polymer/metal interface. It is demonstrated that lithium carbonate offers optimum corrosion protection under moderately alkaline conditions attributed to the formation of a protective layer identified as aluminum-lithium layered double hydroxide. It is proposed that an active-to-passive transition occurs in the presence of lithium carbonate under moderately alkaline conditions where anodic dissolution of the aluminum matrix is an important step prior to the formation of the protective layer. After prolonged exposure, the protective layer is uniformly formed on the surface of AA2024-T3 and lithium containing AA2198-T8 covering both the matrix and active intermetallic particles thus hindering further corrosion reactions.

KW - Aluminium

KW - Lithium carbonate

KW - Potentiodynamic polarisation

KW - Raman Spectroscopy

KW - SEM

KW - Passivation

U2 - 10.1016/j.corsci.2022.110851

DO - 10.1016/j.corsci.2022.110851

M3 - Article

VL - 210

JO - Corrosion Science: the journal on environmental degradation of materials and its control

JF - Corrosion Science: the journal on environmental degradation of materials and its control

SN - 0010-938X

M1 - 110851

ER -