Computational modeling of electrochemical corrosion behavior in bifractional superhydrophobic composite coatings
DOI:
https://doi.org/10.20535/iwccmm2026357856Ключові слова:
superhydrophobic coatings, electrochemical corrosion, finite element modeling, Butler-Volmer kinetics, synergistic protection, composite materialsАнотація
A fully coupled multi-physics finite element model was developed to investigate the electrochemical corrosion mechanisms of bifractional superhydrophobic composite coatings on aluminum substrates. The model integrates Butler-Volmer electrochemical kinetics, Nernst-Planck ion transport, and porous media theory to simulate corrosion initiation and propagation. Validation against experimental polarization data demonstrated that the model successfully reproduces corrosion current densities with high fidelity (within 10% deviation). Results reveal that optimal corrosion protection arises from a synergistic effect: a 3.2-fold increase in solution resistance due to tortuous ion diffusion pathways and a 5.8-fold increase in charge transfer resistance from silane passivation. The validated computational framework provides a mechanistic tool for the rational design of durable superhydrophobic coatings.
Посилання
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