Inhibition effect of thioureidoimidazoline inhibitor for the flow accelerated corrosion of an elbow

Inhibition effect of thioureidoimidazoline inhibitor (TAI) for the flow accelerated corrosion (FAC) at different locations of X65 carbon steel elbow was studied by array electrode and computational fluid dynamics (CFD) simulation. It is demonstrated that TAI is an anodic type inhibitor by remarkably inhibiting the anodic process. The inhibition efficiency at the inner wall is lower than that at the outer wall, which is associated with higher flow velocity, shear stress and turbulent kinetic energy at the inner wall of the elbow. The distribution of inhibition efficiency is in good accordance with the distribution of hydrodynamic parameters.