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API-571 Exam Questions & Answers

Corrosion and Materials  •  API

149 Questions 240 min Updated Jul 2026 99% Pass Rate
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About API-571 Exam

The API-571 Corrosion and Materials certification exam is a critical credential for professionals in the oil and gas, refining, and petrochemical industries who need to demonstrate expertise in corrosion mechanisms and materials selection. This comprehensive examination covers essential topics including types of corrosion, corrosion control methods, materials of construction, metallurgy fundamentals, and inspection techniques. The API-571 certification validates your knowledge of how to identify corrosion risks, select appropriate materials for specific environments, and implement effective mitigation strategies in industrial applications.

Professionals such as materials engineers, inspection engineers, corrosion specialists, and operations technicians should pursue the API-571 certification to advance their careers and enhance their credibility. To successfully pass this challenging exam, candidates benefit significantly from using updated exam dumps and practice tests that mirror the actual test format and difficulty level. These study resources help identify knowledge gaps, build confidence, and improve time management skills during the examination. By combining thorough study materials with hands-on experience, candidates can effectively prepare for the API-571 exam and earn this valuable industry-recognized certification that demonstrates their technical proficiency in corrosion and materials management.

Exam Topics & Objectives

Fundamentals of Corrosion
Materials Selection and Evaluation
Damage Mechanisms and Inspection
Corrosion Control and Mitigation
Industry Standards and Codes

4-Week Study Plan for API-571

Week 1: Fundamentals of Corrosion

  • Study electrochemistry basics: oxidation-reduction reactions, galvanic series, and electrode potentials
  • Review corrosion mechanisms: uniform corrosion, galvanic corrosion, crevice corrosion, and pitting initiation
  • Understand environmental factors affecting corrosion: pH, temperature, dissolved oxygen, and chloride concentration
  • Learn thermodynamics vs. kinetics in corrosion processes
  • Study passivity and passive film formation on metals
  • Complete practice questions on corrosion fundamentals from API-571 study materials
  • Create concept maps linking corrosion types to their electrochemical causes

Week 2: Materials Selection and Evaluation

  • Study carbon steel properties and limitations in corrosive environments
  • Review alloy steels: low-alloy, stainless steels (austenitic, ferritic, duplex, martensitic), and nickel-based alloys
  • Evaluate copper-based alloys and aluminum alloys for specific applications
  • Learn material selection criteria based on service conditions and expected damage mechanisms
  • Study corrosion resistance data sheets and material specifications (ASTM, ASME)
  • Practice material compatibility assessment exercises
  • Analyze case studies of material failures due to incorrect selection
  • Take practice exam questions on materials selection

Week 3: Damage Mechanisms and Inspection

  • Study high-temperature hydrogen attack, sulfidic corrosion, and naphthenic acid corrosion
  • Review stress corrosion cracking (SCC) mechanisms and susceptible material-environment combinations
  • Learn corrosion fatigue and erosion-corrosion damage mechanisms
  • Study microbiologically induced corrosion (MIC) and biological fouling
  • Review inspection techniques: visual inspection, ultrasonic thickness measurement, radiography, and eddy current testing
  • Learn condition monitoring and risk assessment methodologies
  • Study API-571 inspection tables and damage mechanism selection criteria
  • Complete damage mechanism identification practice problems

Week 4: Corrosion Control, Mitigation, Industry Standards and Codes

  • Study protective coatings: types, application methods, and selection criteria
  • Review cathodic protection: impressed current and galvanic systems
  • Learn inhibitors: filming amine, neutralizing, and oxygen scavenger types
  • Study material upgrade strategies and design modifications for corrosion prevention
  • Review relevant ASME, API, and NACE standards: API-650, API-579, ASME B31.3, NACE standards
  • Learn regulatory requirements and compliance documentation
  • Study industry best practices for corrosion management programs
  • Take full-length practice exams covering all five knowledge domains
  • Review weak areas and retake focused practice questions
  • Complete final review of API-571 reference material

Sample API-571 Questions

Practice with real exam-style questions. Reveal answers to verify your knowledge.

Q1 MultipleChoice

Which of the following statements about high-temperature hydrogen attack is most accurate?

Q2 MultipleChoice

What alloy element most improves naphthenic acid corrosion (NAC) resistance?

Q3 MultipleChoice

Which of the following can increase the corrosion rate of carbon steel via hydrofluoric (HF) acid corrosion?

Q4 MultipleChoice

Microbiologically induced corrosion is largely independent of the:

Q5 MultipleChoice

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

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Frequently Asked Questions

API-571 is a professional certification exam focused on corrosion and materials knowledge for the oil and gas industry. It validates an individual's expertise in identifying, preventing, and managing corrosion in industrial equipment and piping systems.

The API-571 exam is ideal for engineers, inspectors, maintenance professionals, and operations personnel working in refining, petrochemical, and pipeline industries. It is particularly valuable for those involved in asset integrity management and corrosion control programs.

The exam covers corrosion mechanisms, materials selection, corrosion control methods, inspection techniques, and failure analysis. Key areas include high-temperature corrosion, erosion-corrosion, stress corrosion cracking, and underground corrosion.

Candidates should study the official API-571 standard document thoroughly and consider taking preparatory courses offered by API or authorized training providers. Practice exams and study groups can also help reinforce understanding of corrosion mechanisms and material properties.

The API-571 exam typically consists of multiple-choice questions and requires a passing score of around 70% to 75%, though specific requirements may vary. The exam is usually offered in a proctored format either in-person or online through approved testing centers.
Exam Details
  • Exam CodeAPI-571
  • VendorAPI
  • Total Questions149
  • Duration240 min
  • LanguageEnglish
  • Last UpdatedJul 18, 2026
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