Hot API-571 Download Pass Certify | Reliable API-571 Dumps Collection: Corrosion and Materials Professional

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API API-571 Exam Syllabus Topics:

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

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API Corrosion and Materials Professional Sample Questions (Q57-Q62):

NEW QUESTION # 57
__________ is a form of stress corrosion cracking normally occurring during shutdowns, startups or during operation when air and moisture are present. Cracking is due to sulfur acids forming from sulfide scale, air and moisture acting on sensitized stainless steel.

A. None of the above
B. Chloride SCC
C. Caustic SCC
D. Polythionic acid SCC

Answer: D

NEW QUESTION # 58
Dew point corrosion can occur if the metal temperature is below the dew point. The dew point of sulfuric acid is __________.

A. 310(o) F
B. 280(o) F
C. 220(o) F
D. 190(o) F

Answer: B

NEW QUESTION # 59
(Deaerators that have not been postweld heat-treated are commonly subject to:)

A. Caustic stress corrosion cracking
B. Corrosion fatigue
C. Steam blanketing
D. Vibration-induced fatigue

Answer: A

Explanation:
Comprehensive and Detailed Explanation From Exact Extract:
Per API RP 571, deaerators often operate in environments where concentrated caustic solutions can form locally due to oxygen scavengers and water chemistry control additives.
When postweld heat treatment (PWHT) is not performed:
* High residual welding stresses remain
* Conditions are ideal for caustic stress corrosion cracking (Caustic SCC) API RP 571 identifies deaerators as classic examples of equipment that has experienced caustic SCC when PWHT was omitted.
Referenced Documents (Study Basis):
* API RP 571 - Section on Caustic Stress Corrosion Cracking

NEW QUESTION # 60
PWHT is ___________ in preventing caustic SCC.

A. Not effective
B. Not practical
C. None of the above
D. Effective

Answer: D

NEW QUESTION # 61
Corrosion by HF (Hydrofluoric) acid can result in high rates of general or localized corrosion and may be accompanied by hydrogen cracking, blistering and ________.

A. HIC
B. SOHIC
C. Both A and C
D. Delayed cracking

Answer: C

NEW QUESTION # 62
......

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