| Summary: | Different corrosion reactions were studied as a function of the bulk electrolyte pH, acidic, neutral and alkaline pH. Three variables, H+, OH‘ and dissolved metal ions concentration were modeled along with the water ionization reaction as a homogeneous reaction. Different geometries were selected to simulate metal corrosion around inclusions, similar to A1 and steel alloys corrosion. Modeling showed that reduction of O2 at an inclusion caused the pH to increase at and around the inclusion. Coupling the reaction to dissolution of the surrounding metal matrix showed that the pH was decreased over the anodic dissolution region. The pH distribution was strongly affected by the bulk pH and was confined to 50 μm distance from the surface. Metal ions concentration was found to be affected mostly by the system geometry. Keywords: Heterogeneous reactions, Finite element, aluminum alloys Corrosion, Inclusions
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