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Introduction to Modeling Corrosion

This course is an introduction to modeling corrosion using COMSOL Multiphysics^® and the add-on Corrosion Module. In this course, we will cover the the two main branches of corrosion modeling: galvanic corrosion processes and cathodic protection systems. We will review the key equations and theory behind the interfaces you will use as you get started with building your models. You will be guided through the setting up and solving of various applications, including how to model current distribution, deforming geometry, thin film electrolytes and conductors, edge electrodes and more to gain valuable insights on best practices and techniques while modeling corrosion in COMSOL Multiphysics.

Modeling to see the impact of primary, secondary, and tertiary currents on a wire electrode embedded in electrolyte with fluid flow.

An overview of the what is covered throughout the course is as follows:

Part 1 - Introduction: Theory, Equations and Interfaces

• Introduction to the Corrosion Module and interfaces
• Fundamentals of corrosion modeling
• The importance of current distribution when modeling corrosion

Part 2 - Boundary Conditions: Polarization Curves and Materials

• Boundary conditions to simulate reactions at the metal surfaces
• Electrode kinetics using pre-defined equations, user-defined equations, or polarization curves
• The built-in corrosion material library in COMSOL Multiphysics

Part 3 - Moving Interfaces

• Introduction to the Deforming Geometry (Moving Mesh) method
• Introduction to the Level Set and Phase Field interfaces

Part 4 - Modeling Geometrically Thin Features

• Modeling thin film electrolytes and conductors
• Using edge electrodes in pipelines

Part 5 - Numerical Methods: FEM, BEM, and Solvers

• Using the finite element method (FEM) vs. boundary element method (BEM) in corrosion modeling
• Manually changing the solver and discretization settings

Upon completing the course, you will have a thorough understanding of the workflow for modeling corrosion using the software. You will also be knowledgeable of the various specialized physics features available for modeling different corrosion applications.