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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.
% Cr, Al-5 at.% Mo, 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, also also measured. These alloys produced by casting contained coarse intermetallics and therefore showed poor corrosion resistance. Al-5 at.% Cr alloy produced by high-energy ball milling a significant 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.