Free API 571 Exam Prep
API 571 Corrosion and Materials
Prepare for the API 571 exam without spending hundreds on expensive prep courses. Free study guides, practice questions, flashcards, and related exam resources.
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API API Inspector Certifications License: Complete Roadmap
Follow this path to organize your licensing and exam preparation
Build the VocabularyYou are here
Start with morphology, process variables, susceptible materials, and BOK terminology so scenario questions become easier to decode.
Master Metal-Loss Mechanisms
Cover pitting, crevice, MIC, CUI, erosion-corrosion, and service-related metal loss with likely locations and inspection clues.
Drill Refinery-Service Corrosion
Study sour water, ammonium salts, amines, acid gas, wet CO2, alkylation acids, and naphthenic-acid service conditions.
Differentiate Cracking and High-Temperature Damage
Separate wet H2S forms, chloride and polythionic cracking, HTHA, sulfidation, carburization, and metal dusting by temperature and metallurgy.
Finish with Mixed Timed Sets
Use timed practice to connect mechanism recognition with materials selection, mitigation, and inspection decisions.
Can You Take the API 571 Exam?
Check if you meet the basic eligibility requirements
- •Experience must be documented and acceptable to API.
- •The exam is scheduled within API testing windows rather than on-demand year-round.
- •Remote delivery is currently listed as available for API 571 on API's schedules-and-fees page.
API 571 Quick Facts
Time to Get Licensed
6-10 weeks typical for experienced fixed-equipment candidates
From start to license in hand
Total Cost Breakdown
Free API 571 Prep Tools
200 Practice Questions
Coverage across terminology, metal loss, refinery-service corrosion, cracking, and high-temperature damage.
AI Weak-Spot Review
Focus extra reps on mechanisms you confuse, such as HIC versus SSC or sulfidation versus naphthenic-acid attack.
Current 2026 Facts
Built around the current API 571 certification page, fee schedule, and live BOK references.
Free API 571 Prep
Start drilling corrosion and materials scenarios before paying for the official exam window.
What You'll Study
17 chapters covering the exam topics in this guide
Chapter 1: Exam Structure, Terminology & Corrosion Fundamentals
3 sections
Chapter 2: Atmospheric, Water & Soil Corrosion
3 sections
Chapter 3: Microbial, Electrochemical & Velocity-Induced Metal Loss
3 sections
Chapter 4: Refining Sour Water & Overhead Systems Corrosion
3 sections
Chapter 5: Acid Gas, Amine & Mineral Acid Systems
3 sections
Chapter 6: Heavy Oil, Alkylation & Specialty Acid Services
3 sections
Chapter 7: High-Temperature Oxidation & Sulfidation
3 sections
Chapter 8: High-Temperature Carbon, Nitrogen & Ash Reactions
3 sections
Chapter 9: High-Temperature Hydrogen Attack & High-Temp Rupture
3 sections
Chapter 10: Wet H2S Cracking Mechanisms
3 sections
Chapter 11: Stainless Steel & Nickel Alloy Stress Corrosion Cracking
3 sections
Chapter 12: Environmental Cracking in Chemical & Refining Services
3 sections
Chapter 13: Mechanical, Thermal & Corrosion Fatigue
3 sections
Chapter 14: Metallurgical Phase Embrittlement & Cast Iron Degradation
3 sections
Chapter 15: Thermal Degradation of Microstructure & Grain Structure
3 sections
Chapter 16: Toughness Loss, Welding & Dissimilar Metal Cracking
3 sections
Chapter 17: Environmental Embrittlement & Specialized Hydriding
3 sections
API 571 Exam Details
API 571 Corrosion and Materials
Administered by American Petroleum Institute (API)
Exam Content Breakdown
Based on the official American Petroleum Institute (API) content outline
Core terminology, morphology language, process-condition variables, and corrosion/materials concepts from the official BOK.
General corrosion, pitting, crevice attack, underdeposit corrosion, MIC, erosion-corrosion, cavitation, and CUI/external corrosion.
Sour water, overhead salts, amine and acid-gas systems, wet CO2, alkylation acids, and naphthenic-acid service.
Oxidation, sulfidation, carburization, metal dusting, nitriding, decarburization, and high-temperature hydrogen attack.
Wet H2S damage, chloride and polythionic cracking, caustic and amine cracking, fatigue, creep, brittle fracture, and embrittlement mechanisms.
What's Included
17 Chapters
Complete exam coverage
Practice Quizzes
With detailed explanations
Free to Start
No credit card required
Quality Exam Prep Shouldn't Cost Hundreds
I'm Ran Chen, an engineer with 20+ years of coding experience. I passed my Life Insurance license, EA exam, SIE, Series 6, 63, 65, and finally the CFP® exam.
Through all these exams, one thing became clear: exam prep is expensive. But with AI, we can change that. Quality preparation can now be free for everyone.
What's Next After the API 571?
After passing the API 571, you can pursue these career paths
API 510
Pair corrosion-mechanism expertise with pressure-vessel inspection decisions.
API 570
Extend API 571 damage-mechanism knowledge into in-service piping inspection.
API 653
Use corrosion-and-materials knowledge to strengthen storage-tank integrity work.
API 571 Exam FAQ
Official American Petroleum Institute (API) Resources
Verify information with these official sources
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