Check your mailbox, practice regularly — that behavior alone is of great use to your exam. The API Corrosion and Materials Professional study vce at Lead2Passed: 151 practice questions for the API-571 exam in 2026.
API API-571 Exam Overview:
| Certification Vendor: | American Petroleum Institute (API) |
|---|---|
| Exam Name: | Corrosion and Materials Professional Certification Exam |
| Exam Number: | API-571 |
| Related Certifications: | API 570 Piping Inspector API 510 Pressure Vessel Inspector API 653 Aboveground Storage Tank Inspector |
| Exam Format: | Closed-book exam, Computer-based test, Multiple-choice questions |
| Exam Price: | $440 USD |
| Passing Score: | 70% / Scaled score determined by API |
| Available Languages: | English |
| Real Exam Qty: | 110 (100 scored, 10 unscored pretest) |
| Exam Duration: | 195 minutes |
| Certificate Validity Period: | 3 years |
| Recommended Training: | API RP 571 Damage Mechanisms Standard |
| Exam Registration: | API ICP Portal Prometric Scheduling |
| Sample Questions: | DOWNLOAD DEMO |
| Exam Way: | Computer-based testing (CBT) at Prometric test centers; online proctored option available |
| Pre Condition: | Hold current API 510, 570 or 653 certification; or meet education + experience requirements: BS/BS in engineering/tech + 1 year, 2-year degree + 2 years, high school + 3 years industry experience (past 10 years) |
| Official Syllabus URL: | https://www.api.org/products-and-services/individual-certification-programs/certifications/api571 |
API API-571 Exam Syllabus Topics:
| Section | Weight | Objectives |
|---|---|---|
| Topic 1: High-Temperature Corrosion and Degradation | 15% | - Decarburization - Graphitization - Metal Dusting - Carburization |
| Topic 2: Uniform or Localized Loss of Thickness | 25% | - Sulfidation - Hydrochloric Acid Corrosion - Oxidation and Scaling - Corrosion Under Insulation (CUI) - Ammonium Bisulfide Corrosion |
| Topic 3: Other Damage Mechanisms | 15% | - Erosion and Erosion-Corrosion - Microbiologically Influenced Corrosion - Liquid Metal Embrittlement - Cavitation Damage |
| Topic 4: Environmentally Assisted Cracking | 25% | - Sulfide Stress Cracking - Caustic Stress Corrosion Cracking - Chloride Stress Corrosion Cracking - Hydrogen Embrittlement |
| Topic 5: Mechanical and Metallurgical Failure Mechanisms | 15% | - Thermal Fatigue - Mechanical Fatigue - Brittle Fracture - Creep and Stress Rupture |
| Topic 6: Terms, Definitions, and Acronyms | 5% |
API API-571 Exam: Patient Answers
Upon successful payment, our system emails the API Corrosion and Materials Professional study material automatically within about a minute, with 24/7 patient help if nothing arrives within 2 hours. If you fail the corresponding API-571 exam within 60 days of purchase, we refund the full amount: send a scanned enrollment slip plus the official Score Report PDF within 2 days of the exam, processed within 7 days. Excluded: exams within 3 days of purchase, candidate names that don't match the payer, and free or expired products. Or exchange for two equal-value products free.
Yes:
After any course, keep reviewing efficiently with the 151 practice questions for the API Corrosion and Materials Professional — every answer expert-verified.
The API Corrosion and Materials Professional blueprint spans 6 domains — including Environmentally Assisted Cracking (25%), Uniform or Localized Loss of Thickness (25%), Other Damage Mechanisms (15%). Our experts analyze this outline and notice every little change; the complete outline above lists every subtopic.
The API Corrosion and Materials Professional is API's certification exam for Corrosion and Materials Professional, at the Professional level. One useful certificate can exert real influence on your future. Related credentials include API 510 Pressure Vessel Inspector, API 570 Piping Inspector, API 653 Aboveground Storage Tank Inspector.
$440 USD per attempt, 70% / Scaled score determined by API to pass. Retakes cost the full fee — practice regularly with the 151 practice questions for the API-571 exam at Lead2Passed before you book.
195 minutes for 110 (100 scored, 10 unscored pretest) questions. Regular timed practice in the Lead2Passed engine makes the format familiar long before exam day.
Hold current API 510, 570 or 653 certification; or meet education + experience requirements: BS/BS in engineering/tech + 1 year, 2-year degree + 2 years, high school + 3 years industry experience (past 10 years) Eligibility rules change over time, so verify the current requirements on the official page (official API-571 exam page) before registering.
Yes — under each kind of API Corrosion and Materials Professional practice test we offer one free demo, including a real part of the content; look through it thoroughly before ordering. Purchases include 365 days of free updates by email; renew afterward at 50% off.
Through the vendor's official registration channels:
The API Corrosion and Materials Professional is delivered Computer-based testing (CBT) at Prometric test centers; online proctored option available — pick the arrangement that suits you when booking.
API Corrosion and Materials Professional Sample Questions:
H#S content, pH, temperature, velocity, and oxygen concentration are critical factors of:
- A. Polythionic acid cracking
- B. Naphthenic acid corrosion
- C. Sour water acid corrosion
- D. Sulfuric acid corrosion
Correct Answer: C 🗳️
Explanation: Only visible for Lead2Passed members. You can sign-up / login (it's free).
Caustic corrosion is most often associated with:
- A. Caustic treaters
- B. Caustic injections in crude units
- C. Caustic storage tanks (non-postweld heat treated)
- D. Boilers and steam generating equipment
Correct Answer: B 🗳️
Explanation: Only visible for Lead2Passed members. You can sign-up / login (it's free).
Steel hardness and strength are critical factors for what type of damage mechanism?
- A. Polythionic acid cracking
- B. Hydrogen stress cracking-HF
- C. Carbonate corrosion stress cracking
- D. Amine stress corrosion cracking
Correct Answer: B 🗳️
Explanation: Only visible for Lead2Passed members. You can sign-up / login (it's free).
At which of the following temperatures would the highest atmospheric corrosion rates be expected?
- A. 175°F (79°C)
- B. 250°F (120°C)
- C. 275°F (135°C)
- D. 200°F (93°C)
Correct Answer: A 🗳️
Explanation: Only visible for Lead2Passed members. You can sign-up / login (it's free).
Boiler water condensate corrosion is caused primarily by:
- A. Carbon dioxide and oxygen
- B. High pH from water treatment problems
- C. Dissolved iron oxides
- D. Sodium sulfites or hydrazines
Correct Answer: A 🗳️
Explanation: Only visible for Lead2Passed members. You can sign-up / login (it's free).
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