The corrosion behaviors of the two Cu-60Fe-12Cr alloys prepared by powder metallurgy (PM) and mechanical alloy (MA) with the great different grain size were investigated in solutions containing chloride ions by open-circuit potential(OCP),potentiodynamic polarization and electrochemical impedance spectroscopy (EIS) methods.Results show that the free corrosion potentials move towards negative values and corrosion rates become faster with the increment of chloride ion concentrations for both PM Cu-60Fe-12Cr and MA Cu-60Fe-12Cr alloys.Chloride ions break passive film and increase corrosion rates by displacing O-2 from corrosion products.For PM and MA Cu-60Fe-12Cr alloy,their EIS plots consist of single capacitive loop without diffusion tail induced Warburg resistance.Corrosion process was controlled by electrochemical reactions.The corrosion rates of MACu-60Fe-12Cr alloy become faster than those of PMCu-60Fe-12Cr alloy because the reduction in the grain size of MACu-60Fe-12Cr alloy produces large concentrations of grain boundaries and increases the number of reactive atoms in alloy surface.