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Last Updated: Nov 08, 2026

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API API-571 Exam Overview:

Certification Vendor:American Petroleum Institute (API)
Exam Name:API 571 - Corrosion and Materials Professional Certification Examination
Exam Number:API-571
Real Exam Qty:100
Exam Duration:3.5 hours (210 minutes)
Exam Format:Multiple Choice
Related Certifications:API 510 Pressure Vessel Inspector
API 653 Aboveground Storage Tank Inspector
API 570 Piping Inspector
Passing Score:Minimum passing score determined by API using the modified Angoff method (typically around 70%)
Certificate Validity Period:3 years
Exam Price:$900 USD (exam fee through API)
Available Languages:English
Sample Questions: DOWNLOAD DEMO
Exam Way:Computer-Based Testing (CBT) at PSI test centers
Pre Condition:Candidates must hold a current API 510, 570, or 653 certification to automatically qualify. Otherwise, qualification is based on education and a minimum of 1-5 years of experience in the petrochemical industry acquired within the last 10 years.
Official Syllabus URL:https://www.api.org/products-and-services/individual-certification-programs/certifications/api571

API API-571 Exam Syllabus Topics:

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

FAQ: Preparing for API Corrosion and Materials Professional the Smart Way

API Corrosion and Materials Professional is an official exam run by American Petroleum Institute (API) under exam code API-571. Passing it awards the ICP Programs certification, which sits at the Professional tier. It also counts toward related credentials such as API 510 Pressure Vessel Inspector, API 570 Piping Inspector, API 653 Aboveground Storage Tank Inspector. Certified professionals remain in shorter supply than the market wants, which is precisely why this exam keeps showing up in conversations about better roles and better pay.

The API Corrosion and Materials Professional exam gives you 3.5 hours (210 minutes) to work through 100 questions. That is a tight ratio, and it punishes candidates who get emotionally attached to any single item. The fix is mechanical: answer what you know, flag what you do not, and keep moving. A few full-length timed runs in the PracticeMaterial test engine, with its randomized question order, will calibrate your pace far better than untimed reading ever could.

The official fee for API Corrosion and Materials Professional is $900 USD (exam fee through API), and Minimum passing score determined by API using the modified Angoff method (typically around 70%) is what passing takes. The uncomfortable part: retakes cost the full $900 USD (exam fee through API) again, which makes preparation the cheapest line item in this whole project. Before booking, put yourself through repeated scored sessions with the PracticeMaterial practice tests and compare results over time; a stable margin above the passing line, not a single lucky run, is when you are ready.

Candidates must hold a current API 510, 570, or 653 certification to automatically qualify. Otherwise, qualification is based on education and a minimum of 1-5 years of experience in the petrochemical industry acquired within the last 10 years.

Vendor rules do get revised, so treat this as your starting point and confirm the current eligibility details before booking via the official exam page.

It is. PracticeMaterial publishes a free PDF demo of the API Corrosion and Materials Professional material, so the product can prove itself before you pay. Your purchase then comes with 365 days of free updates, and once that period ends, extending the update service costs 50% of the regular price. The test engine software itself is verified malware-free and safe to install.

PracticeMaterial stands behind the product with a 100% money-back guarantee under defined conditions. If you take the API Corrosion and Materials Professional exam within 60 days of purchase and fail, you qualify for a full refund, provided the exam corresponds to your product. Sitting the exam within 3 days of purchase does not qualify, and neither do unused downloads, free materials, or expired orders; the candidate name must match the payer name. Submit a scanned enrollment slip and the official Score Report PDF within 2 days of the exam, and claims are resolved within 7 days. You may also choose an exchange instead of a refund: two other exam products of equal value, free, with the update service on your original purchase retained.

Delivery takes about a minute. Files unlock for instant download at payment and are emailed to you automatically; if 2 hours pass with nothing received, check spam and contact customer service. There is no installation limit, so the test engine can live on every device you own, phone included.

API Corrosion and Materials Professional breaks down into 1 official domains, led by Damage Mechanisms. You will find the full topic-by-topic outline above on this page; use the weightings to budget your study hours where they pay back the most.

API Corrosion and Materials Professional Sample Questions:

Question #1

Which family of alloys is more sensitive to hydrogen embrittlement during fabrication?

  • A. Carbon -1/2 Molys
  • B. High Strength Low Alloys
  • C. Duplex Stainless Steels
  • D. Chrome-Molybdenum Alloys
Reveal Solution  Discussion  0

Correct Answer: B  🗳️

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Question #2

(Which of the following may be more susceptible to polythionic acid stress corrosion cracking?)

  • A. Type 304 stainless steel
  • B. SA-516 Grade 70 carbon steel
  • C. Monel 400
  • D. Type 321 stainless steel
Reveal Solution  Discussion  0

Correct Answer: A  🗳️

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Question #3

(What steel alloy is no longer recommended for services susceptible to HTHA?)

  • A. Mn-0.5 Mo steel
  • B. C-0.5 Mo steel
  • C. 1.25 Cr-0.5 Mo steel
  • D. 1 Cr-0.5 Mo steel
Reveal Solution  Discussion  0

Correct Answer: D  🗳️

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Question #4

Corrosion under insulation mitigation is best achieved by:

  • A. Maintaining process temperatures at the boiling point of water
  • B. Using low-chloride insulation
  • C. Implementing a carefully planned, periodic inspection program
  • D. Using appropriate coatings
Reveal Solution  Discussion  0

Correct Answer: D  🗳️

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Question #5

If thermal shock damage may be present, which of the following should be checked?

  • A. Hardness of the furnace outlet piping
  • B. Surface exfoliation of furnace tubes
  • C. Hot/cold injection points
  • D. Bulging at elbows
Reveal Solution  Discussion  0

Correct Answer: C  🗳️

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