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API API-571 Exam Syllabus Topics:

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

                                                        >> API-571 Valid Braindumps Questions <<

                                                        API API-571 Study Dumps, Exam Vce API-571 Free

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                                                        API Corrosion and Materials Professional Sample Questions (Q50-Q55):

                                                        NEW QUESTION # 50
                                                        Carbonate stress corrosion cracking usually occurs at welds or cold worked areas that __________.

                                                        Answer: A


                                                        NEW QUESTION # 51
                                                        ___________ cooling water outlet temperatures and/or process side outlet temperatures tend to __________ corrosion rates as well as fouling tendency.

                                                        Answer: A


                                                        NEW QUESTION # 52
                                                        Cooling water corrosion of exchanger tubes is typically increased by:

                                                        Answer: C

                                                        Explanation:
                                                        According to API RP 571, under the section "Corrosion in Aqueous Environments - Cooling Water Corrosion
                                                        ", one of the key contributors to corrosion in carbon steel and other materials used in heat exchangers is the presence of dissolved oxygen. API RP 571 states:
                                                        "Oxygen is a primary contributor to corrosion in cooling water systems. Systems open to the atmosphere are typically more corrosive than closed systems due to the continual replenishment of oxygen."
                                                        "Corrosion rates are highest where oxygen concentration is the greatest, especially in systems using untreated or poorly treated water."
                                                        "Carbon steel corrodes in the presence of oxygen and water, forming corrosion products that may or may not adhere to the surface." (Reference: API RP 571, Section 4.3.1.1 - Cooling Water Corrosion) Therefore, increasing oxygen content directly increases corrosion activity in exchanger tubes, making option C the correct and documented answer.


                                                        NEW QUESTION # 53
                                                        300 Series SS is susceptible to LME when it comes in contact with molten ________.

                                                        Answer: B


                                                        NEW QUESTION # 54
                                                        In HF service, carbon steel forms a protective _________ scale in dry concentrated acid. Loss of the protective scale through high velocities or turbulence will result in greatly accelerated corrosion rates.

                                                        Answer: A


                                                        NEW QUESTION # 55
                                                        ......

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