Corrosion protection in a coating defect on AA2024-T3 by lithium carbonate inhibitor leaching: An experimentally validated FEM approach
A 2D finite element model is developed to simulate the protection of active protective coatings in a defect. The leaching kinetics, inhibitor-electrolyte reactions and electrochemical surface reactions on homogenized AA2024-T3, are considered. Changes in local oxygen distribution, pH, and current density over time are validated using surface scanning micro-probe techniques. The limitations posed by the prediction of surface current density at the metal interface using a FEM model with a homogenized microstructure are identified and addressed. The validated FEM is then used to predict inhibitor concentration and pH dependent on the initial inhibitor pigment concentration in an organic coating . • Finite element modeling employed to study the effect of corrosion inhibitors. • PDP and leaching measurements utilized as input for lithium carbonate model. • Surface scanning micro-probe techniques used for model validation. • Predictions of corrosion protection predictors for different initial inhibitor concentrations.
Authors
- Mats Meeusen (ORCID: https://orcid.org/0000-0002-9658-3049)
- Peter Visser (ORCID: https://orcid.org/0000-0002-6388-382X)
- J.M.C. Mol (ORCID: https://orcid.org/0000-0003-1810-5145)
- Sviatlana V. Lamaka (ORCID: https://orcid.org/0000-0002-0349-0899)
- Silvar Kallip (ORCID: https://orcid.org/0000-0001-6093-3636)
- Mikhail L. Zheludkevich (ORCID: https://orcid.org/0000-0002-9658-9619)
- Herman Terryn
- Nourhan Abdelrahman (ORCID: https://orcid.org/0000-0003-4124-5437)
- Tom Hauffman (ORCID: https://orcid.org/0000-0002-3456-0271)
- Nils Van den Steen (ORCID: https://orcid.org/0000-0001-8003-2165)
- Cheng Wang (ORCID: https://orcid.org/0000-0003-2883-8131)
- René Böttcher (ORCID: https://orcid.org/0000-0001-9016-4129)
- Can Özkan (ORCID: https://orcid.org/0000-0001-8029-806X)
- Ci Song (ORCID: https://orcid.org/0000-0003-2146-6259)
Institutions
- Vrije Universiteit Brussel (BE)
- Hochschule für Angewandte Wissenschaften Kiel (DE)
- Christian-Albrechts-Universität zu Kiel (DE)
- Airbus (Germany) (DE)
- Helmholtz-Zentrum Hereon (DE)
- University of Tartu (EE)
- AkzoNobel (Netherlands) (NL)
- Southeast University (CN)
- Delft University of Technology (NL)
Publication Details
- Journal
- Corrosion Science
- Published
- 2025-03-18
- DOI
- https://doi.org/10.1016/j.corsci.2025.112861
- Citations
- 5
- Primary Topic
- Corrosion Behavior and Inhibition
- Type
- article
- Field-Weighted Citation Impact
- 2.59