AMPP Senior Corrosion Technologist Practice Questions - AMPP Senior Corrosion Technologist Certification Exam

Which parameter defines the 'sour service' threshold per NACE MR0175/ISO 15156 for carbon and low-alloy steels?

Temperature > 65°C H2S partial pressure ≥ 0.05 psi (0.3 kPa) in the gas phase Pressure > 1000 psi total CO2 partial pressure > 1 psi

Correct Answer:

H2S partial pressure ≥ 0.05 psi (0.3 kPa) in the gas phase

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