Electrochemistry Open LessonsSustainable Electrochemical Science & Technology, BRIN

Chapters / Chapter 5

5 Corrosion

Mixed potential theory, polarization resistance and Tafel extrapolation, and turning a current into a corrosion rate.

Lessons

Lesson 5.1

Why metals corrode

Anodic and cathodic reactions, mixed potentials, Evans diagrams and passivity. About 25 minutes

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Lesson 5.2

Measuring corrosion rates

OCP, linear polarization resistance, Tafel extrapolation, impedance and inhibitor efficiency. About 30 minutes

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Tool for this chapter

Tool

Corrosion explorer

An interactive Evans diagram, the Stern–Geary equation and corrosion rate from current.

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