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Question 13/65
(Sulfidation is known to be accelerated by the presence of:)
Correct Answer: A
Comprehensive and Detailed Explanation From Exact Extract:
Per API RP 571, sulfidation corrosion rates are significantly accelerated by the presence of hydrogen.
Hydrogen promotes:
* Breakdown of protective sulfide scales
* Increased diffusion of sulfur into the metal
* Higher metal loss rates
This phenomenon is often referred to as hydrogen-assisted sulfidation and is commonly observed in refinery process units.
Moisture is more closely associated with oxidation mechanisms rather than high-temperature sulfidation.
Referenced Documents (Study Basis):
* API RP 571 - Section on Sulfidation and High-Temperature Corrosion
Per API RP 571, sulfidation corrosion rates are significantly accelerated by the presence of hydrogen.
Hydrogen promotes:
* Breakdown of protective sulfide scales
* Increased diffusion of sulfur into the metal
* Higher metal loss rates
This phenomenon is often referred to as hydrogen-assisted sulfidation and is commonly observed in refinery process units.
Moisture is more closely associated with oxidation mechanisms rather than high-temperature sulfidation.
Referenced Documents (Study Basis):
* API RP 571 - Section on Sulfidation and High-Temperature Corrosion
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