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.