The work aims to study the difference of corrosion degree and main corrosion areas of Q235 carbon steel under static and flowing conditions. The changes and difference of current density distributions, charge transfer resistance and surface morphology of Q235 carbon steel were studied by WBE and EIS techniques. Meanwhile, the polarity reversals of the electrode were also analyzed. The charge transfer resistance of Q235 carbon steel under flowing conditions was reduced. Under static conditions, the maximum proportion of the anodic current area on the carbon steel surface was 47%, and the anodic current peaks were concentrated in the middle of the WBE and fewer anodic current peaks appeared at the edge of WBE. Under flowing conditions, the maximum proportion of the anodic current area on the carbon steel surface was 58%, and the anodic current peaks were randomly distributed across the WBE surface and the interval of current distributions was significantly narrowed. Polarity reversals occurred in No.58 and No.39 electrodes, which were respectively immersed in static and flowing conditions. In conclusion, the nonuniform corrosion of Q235 carbon steel could be found under both static and flowing conditions. Thecorrosion degree of Q235 carbon steel became more seriousand the corrosion inhomogeneities were reduced under flowing conditions. Under the static condition, the corrosion area of Q235 carbon steel was concentrated in the middle area, while the corrosion area of Q235 carbon steel under flowing condition was randomly distributed on the entire carbon steel surface. The reasons for polarity reversals were differentfrom each other. The polarity reversal of current occurred in steel electrodes under both static and flowing conditions.