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API-571 Exam Reference

Reference: http://www.api.org/products-and-services/individual-certification-programs/certifications/api571#tab_exam-info

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API API-571 Exam Syllabus Topics:

SectionObjectives
Damage Mechanisms- High-Temperature Hydrogen Attack (HTHA)
  • 1. Internal Hydrogen Attack (IHA)
  • 2. Decarburization
- Environment-Assisted Cracking
  • 1. Chloride Stress Corrosion Cracking (Cl-SCC)
  • 2. Hydrogen-Induced Cracking (HIC) / Stepwise Cracking
  • 3. Hydrogen Embrittlement
  • 4. Amine Stress Corrosion Cracking
  • 5. Polythionic Acid Stress Corrosion Cracking (PTA-SCC)
  • 6. Caustic Stress Corrosion Cracking
  • 7. Carbonate Stress Corrosion Cracking
  • 8. Ammonia Stress Corrosion Cracking
  • 9. Ethanol Stress Corrosion Cracking (SCC)
  • 10. Stress-Oriented Hydrogen-Induced Cracking (SOHIC)
  • 11. Sulfide Stress Cracking (SSC) / Hydrogen Stress Cracking
- High Temperature Corrosion (800°F / 425°C and above)
  • 1. Oxidation
  • 2. Nitriding
  • 3. Fuel Ash Corrosion
  • 4. Sulfidation
  • 5. Metal Dusting
  • 6. Carburization
- General / Mechanical
  • 1. Graphitization
  • 2. Zinc Embrittlement
  • 3. Hydrogen Embrittlement
  • 4. Thermal Fatigue
  • 5. Fatigue
  • 6. Vibration-Induced Fatigue
  • 7. Sigma Phase Embrittlement
  • 8. Fretting / Fretting Corrosion
  • 9. Brittle Fracture
  • 10. Mechanical Fatigue
  • 11. Softening (Spheroidization)
  • 12. Temper Embrittlement
  • 13. Stress Relief Cracking
  • 14. Cavitation
  • 15. Strain Aging
  • 16. Atmospheric Corrosion
  • 17. Galvanic Corrosion
  • 18. Creep / Stress Rupture
  • 19. Corrosion Under Insulation (CUI)
  • 20. Liquid Metal Embrittlement (LME)
  • 21. Erosion/Erosion-Corrosion
  • 22. Dissimilar Metal Weld (DMW) Cracking
  • 23. 885°F (475°C) Embrittlement
  • 24. Metal Dusting
- Uniform or Localized Loss of Thickness
  • 1. Dealloying (Selective Leaching)
  • 2. Microbiologically Influenced Corrosion (MIC)
  • 3. Flow-Accelerated Corrosion (FAC) / Flow-Assisted Corrosion
  • 4. Flue Gas Dew Point Corrosion
  • 5. CO2 Corrosion
  • 6. Cooling Water Corrosion
  • 7. Caustic Corrosion
  • 8. Atmospheric Corrosion
  • 9. Galvanic Corrosion
  • 10. Soil Corrosion
  • 11. Corrosion Under Insulation (CUI)
  • 12. Boiler Water / Condensate Corrosion

API Corrosion and Materials Professional Sample Questions:

Which of the following will experience the highest oxidation corrosion rate at 1350°F (732°C)?

  • A. 9 Cr low-alloy steel
  • B. Type 310 stainless steel
  • C. Alloy 800H
  • D. Type 304L stainless steel
Reveal Solution  Discussion  0

Correct Answer: A  🗳️

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An inspector has discovered significant cracking in a T-joint where hot and cold hydrogen-containing streams are mixing in a hydroprocess unit. What damage mechanism should the inspector suspect is the cause?

  • A. Thermal fatigue
  • B. Mixing point corrosion
  • C. Injection point corrosion
  • D. Hydrogen embrittlement
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Correct Answer: A  🗳️

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In steam-generating equipment, caustic corrosion is best prevented through:

  • A. use of 300 series stainless steels.
  • B. proper design.
  • C. keeping temperature below the maximum of 250°F (120°C).
  • D. acid injection to balance pH.
Reveal Solution  Discussion  0

Correct Answer: A  🗳️

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Which of the following is a critical factor for chloride stress corrosion cracking?

  • A. Presence of oxygen
  • B. Use in an alkaline pH region
  • C. Presence of nickel content higher than 35%
  • D. Presence of nickel content less than 8%
Reveal Solution  Discussion  0

Correct Answer: A  🗳️

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Which of the following locations would be most susceptible to naphthenic acid corrosion (NAC)?

  • A. Downstream from an injection point
  • B. Regions of high velocity and turbulence
  • C. Under deposits
  • D. Deadlegs
Reveal Solution  Discussion  0

Correct Answer: B  🗳️

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