(In an RBI assessment, sulfidation was identified as a credible damage mechanism and assigned a...

Comprehensive and Detailed Explanation From Exact Extract:

Per API RP 571, sulfidation corrosion is controlled by three primary variables:

Sulfur species concentration (e.g., H₂S, sulfur compounds)

Operating temperature

Metallurgy, especially chromium content

Chromium significantly improves sulfidation resistance by forming protective sulfide scales. All three factors must be considered in RBI assessments.

Referenced Documents (Study Basis):

API RP 571 – Section on Sulfidation Corrosion

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