What is the definition of "erosion corrosion"?

Erosion corrosion is accurately defined as the corrosion that occurs due to the mechanical removal of protective films by fluid flow. This phenomenon typically happens in environments where high-velocity fluids or turbulent flows interact with metal surfaces, disrupting passive films that would otherwise provide protection against corrosion. The removal of these protective layers allows for increased metal surface exposure to corrosive agents, accelerating the overall corrosion process.

In this context, it is crucial to understand that erosion corrosion is not merely a result of environmental factors, mechanical forces, or conditions affecting non-metallic materials, nor is it limited to specific pressures. Instead, it specifically relates to an interplay of fluid dynamics and corrosion mechanisms that critically impacts the integrity of metallic structures, especially in piping systems, pumps, and valves where flow rates are substantial.