AMPP Corrosion Technician Practice Questions - AMPP Corrosion Technician Certification Exam

Which cathodic reaction is dominant in aerated, neutral-pH water such as soil moisture or seawater?

Hydrogen evolution: 2H+ + 2e- → H2 Oxygen reduction: O2 + 2H2O + 4e- → 4OH- Metal reduction: Fe2+ + 2e- → Fe Chloride oxidation: 2Cl- → Cl2 + 2e-

Correct Answer:

Oxygen reduction: O2 + 2H2O + 4e- → 4OH-

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