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From a free demo to 365 days of free updates and a conditional money-back guarantee, ExamPrepAway covers every stage of your API Corrosion and Materials Professional preparation. Start with the API-571 practice questions today and make 2026 the year you get certified.

API API-571 Exam Syllabus Topics:

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

API Corrosion and Materials Professional: Common Questions From Candidates

The API Corrosion and Materials Professional exam (code: API-571) is the official API exam that leads to the ICP Programs certification. It sits at the Professional level of the API certification track. It is also connected with related credentials such as API 510 Pressure Vessel Inspector, API 570 Piping Inspector, API 653 Aboveground Storage Tank Inspector. Passing it proves to employers that your skills have been validated by API itself, which is why the API-571 credential keeps showing up in job postings.

The API Corrosion and Materials Professional exam gives you 3.5 hours (210 minutes) to work through 100. Pacing matters more than most candidates expect, so before exam day, run at least one full timed session in the ExamPrepAway test engine to learn how long you can afford per question. If an item stalls you, flag it and move on — coming back later beats burning five minutes on a single question.

The passing score for the API Corrosion and Materials Professional exam is Minimum passing score determined by API using the modified Angoff method (typically around 70%), and the official registration fee is $900 USD (exam fee through API). Remember that a failed attempt means paying that fee in full again, so a timed self-assessment with ExamPrepAway practice questions about a week before your exam date is a cheap way to confirm you are scoring comfortably above Minimum passing score determined by API using the modified Angoff method (typically around 70%).

According to API, the following applies: 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.. Certification policies do change from time to time, so confirm the latest requirements on the official exam page at https://www.api.org/products-and-services/individual-certification-programs/certifications/api571 before you register.

Yes. ExamPrepAway offers a free API-571 PDF demo so you can review the question style, difficulty, and explanations before committing to anything. After purchase, your API Corrosion and Materials Professional material includes 365 days of free updates, and if your product expires after that, you can extend the update service at a 50% discount from your member zone.

If you take the corresponding API-571 exam within 60 days of your purchase and do not pass, you can apply for a full refund under our 100% Money Back Guarantee, subject to a few conditions: the failed exam must be the one matching your purchase; sitting the exam within 3 days of purchase does not qualify, since that leaves too little preparation time; downloading the material without actually taking the exam does not qualify; free materials and expired orders are excluded; and the candidate name must match the payer name. To apply, send a scanned copy of your enrollment slip together with your official Score Report (PDF) within 2 days after the exam, and claims are processed within 7 days. If you would rather not take a refund, you can exchange your purchase for two free products of equal value while keeping the update service on the product you originally bought. As for delivery, everything is an instant download: your products are sent to your email within one minute of payment — contact customer service if nothing arrives within 2 hours — and there is no limit on the number of computers you can install the software on.

The official API Corrosion and Materials Professional syllabus is organized into 1 main domains. The first three are Damage Mechanisms. For the full domain-by-domain breakdown, see the complete Exam Topics outline above.

API Corrosion and Materials Professional Sample Questions:

The potential for galvanic corrosion will increase when:

  • A. different metals are in contact with presence of electrolyte.
  • B. using a relatively large volume of anodic material.
  • C. applying a coating to both metals.
  • D. insulating dissimilar metals with different electro-chemical potentials.
Reveal Solution  Discussion  0

Correct Answer: A  🗳️

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To detect wet insulation that might give rise to corrosion under insulation, which nondestructive examination (NDE) technique would be most useful?

  • A. Spectroscopy
  • B. Deep penetrating eddy current
  • C. Neutron backscatter
  • D. Low-intensity X-ray imaging scope
Reveal Solution  Discussion  0

Correct Answer: C  🗳️

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(Which of the following is the most important factor in determining carbon steel susceptibility to ethanol stress corrosion cracking in storage tanks?)

  • A. Grade of steel
  • B. Amount of aeration
  • C. Ethanol percentage
  • D. Moisture content
Reveal Solution  Discussion  0

Correct Answer: D  🗳️

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Refer to the following table:
Corroded End - Anodic (More Active)
Magnesium
Magnesium alloys
Zinc
Aluminum
Aluminum alloys
Steel
Cast iron
Type 410 SS (active state)
Ni-Resist
Type 304 SS (active state)
Type 316 SS (active state)
Lead
Tin
Nickel
Brass
Copper
Bronze
Copper-Nickel
Monel
Nickel (passive state)
Type 410 SS (passive state)
Type 304 SS (passive state)
Type 316 SS (passive state)
Titanium
Graphite
Gold
Platinum
Protected End - Cathodic (More Noble)
Which of the following metal combinations is most likely to experience galvanic corrosion in brackish water or seawater?

  • A. Brass coupled to nickel
  • B. Aluminum coupled to steel
  • C. Steel coupled to nickel
  • D. Cast iron coupled to Ni-resist
Reveal Solution  Discussion  0

Correct Answer: B  🗳️

Explanation: Only visible for ExamPrepAway members. You can sign-up / login (it's free).

Which of the following inspection methods should primarily be used to identify naphthenic acid corrosion (NAC) in a piping system?

  • A. Eddy-current testing
  • B. Radiographic testing followed by angle-beam ultrasonic testing
  • C. Radiographic testing followed by ultrasonic measurements
  • D. Angle-beam ultrasonic testing
Reveal Solution  Discussion  0

Correct Answer: C  🗳️

Explanation: Only visible for ExamPrepAway members. You can sign-up / login (it's free).

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