Erosion-corrosion at different locations of X65 carbon steel elbow

Erosion-corrosion (E-C) behavior of X65 pipeline elbow was investigated by array electrodes technique and computational fluid dynamics (CFD) simulation. The four components (pure corrosion rate, pure erosion rate, erosion-enhanced corrosion rate and corrosion-enhanced erosion rate) of E-C rate at different locations of an elbow were quantified. The percentages of these four components were also determined to reveal the dominant factor and the essential difference in E-C at different locations of the elbow due to the change in hydrodynamics. The distribution of E-C rate is in good accordance with the hydrodynamics and sand particles distribution at the elbow.