Inhibition effect of thioureidoimidazoline inhibitor for the flow accelerated corrosion of an elbow. (January 2015)

• Record Type: Journal Article
• Authors: Zeng, L.; Zhang, G.A.; Guo, X.P.; Chai, C.W.
• Is Part Of: Corrosion science. Volume 90(2015)
• Page Start: 202
• Page End: 215
• Publication Date: 2015-01
• Subjects: A. Carbon steel -- B. EIS -- B. SEM -- B. XPS -- C. Acid corrosion; Corrosion and anti-corrosives -- Periodicals; 620.11223
• DOI: 10.1016/j.corsci.2014.10.011
• Languages: English
• ISSNs: 0010-938X

Abstract

Highlights: Flow accelerated corrosion at an elbow is studied by array electrode technique. The fluid dynamics is determined by computational fluid dynamics (CFD) simulation. Inhibition effect of inhibitor at different locations of the elbow is determined. Inhibition efficiency is lower at inner wall than at outer wall of the elbow. The inhibition efficiency at the elbow is in accordance with CFD simulation. Abstract: 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.