Corrosion Failure Analysis of L80 Oil Tube

Material properties of L80 oil tube were tested by means of chemical composition analysis, hardness testing and metallographic examination. Micro-morphology and corrosion production analysis of inner surface were carried out by SEM, EDS and XRD. The results showed that the material properties accorded to API SPEC 5CT. The main reason of inner wall corrosion and thinning for tube sample was solid erosion of multiphase fluid.