Modeling Geometrically Thin Features
In Part 4, we cover techniques for modeling thin geometries, such as thin films or layers of electrolyte and thin conductor. We also discuss using edge electrodes to model cathodic protection in pipelines. The atmospheric corrosion of a busbar tutorial model is used as an example of how to use the Current Distribution, Shell interface to solve for the electrolyte potential in the thin electrolyte film. This model also uses the Secondary Current Distribution interface to solve for the electric potential. We then demonstrate how adding a thin electrolyte layer affects the voltage drop in a cathodic protection model using COMSOL Multiphysics by walking you through the model building process from start to finish. Lastly, using the Edge Electrode and Sacrificial Edge Anode features are demonstrated in a simple, 3D rectangular model to simulate the potential drop and current distributions along a pipeline submerged in seawater.
Follow along in the software by opening a new session of COMSOL Multiphysics and watching the video below.
Further Learning
For additional practice into modeling geometrically thin features for corrosion models, we recommend the corrosion protection of multiple oil platforms and pipeline corrosion protection using impressed current cathodic protection tutorial models.
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