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The corrosion behavior of Al-5 at.％ Cr,Al-5 at.％ Si,Al-5 at.％ Mo and Al-5 at.％ Ti produced via casting and Al-5 at.％ Cr produced by high-energy ball milling and subsequent consolidation by cold pressing was studied using potentiodynamic polarization and surface analysis following constant immersion tests.Alloys were characterized using a scanning electron microscope coupled with the energy-dispersive X-ray spectroscopy and X-ray diffraction analysis.Hardness,a representative of the strength,was also measured.The alloys produced by casting contained coarse intermetallics and therefore exhibited poor corrosion resistance.Al-5 at.％ Cr alloy produced by high-energy ball milling exhibited a significantly improved corrosion resistance and hardness,which was attributed to the grain refinement to nanoscale and extended solid solubility of Cr in Al.The study indicated that the high-energy ball milling was capable of producing Al alloys with improved corrosion behavior and hardness.