Inspection
Work Planning
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The accelerated loss of protective oxide layers caused by flowing fluids, resulting in increased metal loss.
Flow-Accelerated Corrosion (FAC) is a degradation mechanism in which high-velocity flowing fluids remove or prevent the formation of protective oxide films on metallic surfaces, leading to accelerated wall thinning. FAC most commonly affects carbon steel piping and components carrying single-phase or two-phase water and steam under specific operating conditions.
FAC is a significant degradation mechanism in power generation and process industries because undetected wall thinning can result in catastrophic failures and loss of containment.
FAC management typically includes corrosion monitoring, thickness measurements, flow analysis, materials selection and inspection programs focused on susceptible piping systems and components.
Flow-Accelerated Corrosion differs from erosion-corrosion because material loss primarily results from dissolution caused by removal of protective oxide films rather than direct mechanical abrasion.
Mechanical Integrity; Corrosion; Reliability Engineering.
Power generation.; Steam systems.; Process piping.; Corrosion management.; Mechanical integrity.
API RP 571
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