AMPP Corrosion Specialist Practice Questions - AMPP Corrosion Specialist Certification Exam

The Butler-Volmer equation describes electrode kinetics and reduces to the Tafel approximation when:

Overpotential is very small Overpotential is sufficiently large that one exponential term dominates, giving log(i) ~ linear in η Current is zero Temperature is at absolute zero

Correct Answer:

Overpotential is sufficiently large that one exponential term dominates, giving log(i) ~ linear in η

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