Mixed potential theory in corrosion is a free online course that introduces you to the concept of the electrode double layer in a reaction, as well as the significance of the inner and outer Helmholtz planes (IHP and OHP, respectively). It will also ground you in the different types of polarization, as well as the correlation between current density and overvoltage. The derivation of the Butler-Volmer equation, as well as how the Tafel equation is calculated, will also be covered in the material.

The three different types of polarization – activation, concentration and total – are explained. You will analyze the derivation of the mixed potential theory, as well as some case studies that highlight the useful theory and the events of corrosion. Next, master how the Tafel plot can be explained using activation polarization.

Finally, this course will help you get familiar with the step-by-step process for drawing the Evans diagram for a reaction and the different changes that occur in the corrosion rate of a reaction. Engineering students, quality controllers, process engineers and others who work with machinery and materials that corrode will find this material useful to bolster their knowledge and further their qualifications.