Electrochemical Nature of Corrosion

This free online course on the electrochemistry of corrosion teaches you about the processes that can cause corrosion, as well as the impact of different forms of corrosion and how to derive the important Nernst equation. You will learn about the steps for constructing a Pourbaix diagram and be able to explain the relevance of the mixed potential theory.

What You Will Learn In This Free Course

Corrosion and its Forms

In this module, you will be introduced to the concept of corrosion, as well as the various processes that can cause corrosion. You will also be introduced to the different types of corrosion which are uniform, galvanic, crevice, and pitting corrosion, as well as the impact of each type of corrosion.

Thermodynamics of Corrosion

In this module, you will be introduced to the different forms of corrosion, as well as the electrochemical nature of corrosion and its thermodynamics. You will also be introduced to the thermodynamics aspects of corrosion, the concept of free energy change, as well as the process of entropy change.

Nernst Equation in Standard Reduction Potential

In this module, you will be introduced to the relationship between free energy and the equilibrium constant, as well as how the Nernst equation can be derived for a reaction. You will also be introduced to the standard reduction potential series for pure metals, as well as the reduction potentials in acidic and neutral solutions.

Corrosion Process and Pourbaix Diagram

In this module, you will be introduced to the various limitations of standard reduction potential series of pure metals, as well as the concept of concentration cell formation. You will also be introduced to the galvanic series, some examples of concentration cells, as well as the spontaneity of the corrosion process and Pourbaix diagrams.

Diploma in Electrochemistry of Corrosion – First Assessment

You need to score 80% or more to pass.; Module

Construction of Pourbaix Diagrams

In this module, you will be introduced to the construction of the Pourbaix diagram for a Ni-H2O system, as well as happens when the pH concentration of the H+ ion increases. You will also be introduced to the positions where the acidic reactions and basic reactions will happen, as well as the schematic phase diagram for aluminium.

Corrosion Rate Measurements

In this module, you will be introduced to the steps used in the estimation of corrosion rate, as well as kinetics or rate of corrosion and the rate of dissolution of metal. You will also be introduced to the steps for calculating the corrosion rate in the form of mass loss per area per unit time.

Equations for Measuring Corrosion Rate

In this module, you will be introduced to the concept of the electrode double layer, as well as the different types of polarization and the correlation between current density and overvoltage. You will also be introduced to the derivation of the Butler-Volmer equation, as well as how the Tafel equation is derived.

Introduction to Mixed Potential Theory

In this module, you will be introduced to the concepts of activation polarization and concentration polarization, as well as total polarization. You will also be introduced to the derivation of the mixed potential theory, as well as some case studies that highlight the mixed potential theory and the events of corrosion.

Diploma in Electrochemistry of Corrosion – Second Assessment

You need to score 80% or more to pass.; Module

Course assessment