The corrosion tests in pure water at 150°C were performed to investigate the corrosion behavior of CuCrZr alloy at different dissolved oxygen content and different flow rate.The weight loss of the alloy was measured and the oxides were characterized after various exposure times.The results show that the weight loss follows a power law.A duplex oxide scale with a porous outer layer and a dense inner layer was identified on the surface of the specimens.The oxide scale was rather porous at the initial corrosion stage but the porosity decreased with the increasing time,which may be the reason of the decrease of the corrosion rate.The corrosion rate increased with the increasing dissolved oxygen content.This manifests that dissolved oxygen can accelerate corrosion.The influence of flow rate on corrosion was also discussed in this paper.