The Steel-Aluminum Galvanic System under Thin Electrolyte Films: Simulation and Validation
2019
Ruiz-García, A. | Mayen-Mondragon, R. | Galván Sierra, Juan Carlos | Genescá Llongueras, Juan | Montoya-Lopez, R. | Consejo Superior de Investigaciones Científicas [https://ror.org/02gfc7t72]
Modern manufacturing combines conventional materials, such as structural steel, with lighter materials (e.g., aluminum and magnesium alloys) increasing the risk of galvanic corrosion. The present work applies advanced numerical methods and a novel experimental technique for tracking chemical species during galvanic interactions. The model hereby developed predicts the transient distribution of corrosion products generated during the galvanic corrosion of a carbon steel/aluminum alloy system. The model considers a micrometric electrolyte layer containing ten interactive chemical species. It was solved by the finite element method (FEM). The fundamental contribution of the model was the use of an extra source term in the mass conservation equation to avoid meshing limitations, especially when working with extremely thin domains.
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