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API API-571 Exam Syllabus Topics:

Section	Objectives
Topic 1: Materials Selection and Mitigation	- Corrosion control strategies 1. Material selection principles 2. Corrosion inhibitors 3. Coatings and linings
Topic 2: Refining Process-Specific Damage	- FCC and sulfur recovery units 1. Erosion-corrosion interactions 2. High-temperature sulfidic corrosion - Hydroprocessing units 1. High-pressure hydrogen service degradation 2. Hydrogen attack mechanisms
Topic 3: Corrosion Mechanisms	- High-temperature corrosion 1. Oxidation 2. Carburization 3. Sulfidation - Aqueous corrosion 1. Uniform corrosion 2. Pitting corrosion 3. Galvanic corrosion 4. Crevice corrosion 5. Microbiologically influenced corrosion (MIC)
Topic 4: Environmentally Assisted Cracking	- Stress corrosion cracking 1. Chloride stress corrosion cracking 2. Caustic cracking - Hydrogen-related damage 1. Hydrogen blistering 2. Hydrogen embrittlement 3. Hydrogen induced cracking (HIC)
Topic 5: General Knowledge of Damage Mechanisms	- Overview of degradation in refining environments 1. Damage mechanism classification 2. Materials performance fundamentals
Topic 6: Metallurgical Damage Mechanisms	- Embrittlement phenomena 1. Sigma phase embrittlement 2. Temper embrittlement - High-temperature degradation 1. Creep damage 2. Graphitization 3. Thermal fatigue

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API Corrosion and Materials Professional Sample Questions (Q35-Q40):

NEW QUESTION # 35
What damage mechanism can occur in wet H#S environments and is sometimes confused with wet H#S damage?

A. Amine cracking
B. Polythionic cracking
C. Ammonia cracking
D. HCl cracking

Answer: B

Explanation:
API RP 571 - Polythionic Acid Stress Corrosion Cracking:
"Polythionic acid SCC may be mistaken for wet H#S damage because both involve cracking in austenitic stainless steels under certain conditions." Thus, option D is correct.

NEW QUESTION # 36
Sulfidation of iron-based alloys usually begins at metal temperatures above _____.

A. 600(o) F
B. 500(o) F
C. 1000(o) F
D. 800(o) F

Answer: B

NEW QUESTION # 37
The major factors affecting high temperature sulfidation are the temperature, the presence of hydrogen, the H2S concentration and the ________.

A. Pressure
B. Velocity
C. Stress
D. Alloy composition

Answer: D

NEW QUESTION # 38
Graphitization can be prevented by using chromium containing low alloys steels for long-term exposure above
________.

A. 750º F
B. 650º F
C. 800º F
D. 700º F

Answer: C

NEW QUESTION # 39
Which of the following materials is not susceptible to SCC?

A. Carbon steel
B. Low alloy steel
C. Both A and C
D. 300 Series SS

Answer: C

NEW QUESTION # 40
......

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