Given the Corrosion Current and Corrosion Potential which formular(s) can you use the Corrosion Current to calculate the oxidation and reduction exchange current density?
Yes. I need the information for simulation in COMSOL Multiphysics.
Please check the following paper and references within it.
https://www.sciencedirect.com/science/article/abs/pii/S0958946516300749
I don't think that there is a formula for that but rather an experimental way to measure it.
Best regards.
By deriving the equations of the Tafel straight lines and having the exact values of the equilibrium potentials of the anodic and cathodic reactions, the attached graph can give you an idea of how to estimate the values of the anodic and cathodic exchange currents. This assumes that your mechanism is only controlled by charge transfer (no control by mass transfer), and it also assumes that you have a corrosion process involving a single anodic and a single cathodic reaction.
Hope it is clear.
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