Abstract: The water permeability and corrosion behavior of glass flake coating in simulated desulphurization solution was investigated by immerging testing and electrochemical impedance spectroscopy (EIS).It was found that the glass flake coating with the water permeability ratio of 5.19% in simulated desulphurization solution at 60 ℃ exhibited good resistance to permeation.The corrosion resistance of glass flake coating decreased with increase of temperature.The corrosion rate of glass flake coating decreased with the increase of immerging period.