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Engineering LibreTexts

9: The Nernst Equation and Pourbaix Diagrams

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  • Learning Objectives

    On completion of this TLP you should:

    • Introduce and explain the basic ideas of electrochemistry, including electrochemical potentials, half cell reactions and equilibria.
    • Describe the mechanisms of aqueous corrosion
    • Derive the Nernst equation and show how it can be used to derive Pourbaix diagrams.
    • Explain the information contained in a Pourbaix diagram, and demonstrate how this can be used to predict corrosion behaviour.

    Before you start

    This TLP is largely self-explanatory, but a basic knowledge of logarithms and thermodynamics may be of some help. A general introduction to relevant thermodynamics can be found here.

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