The newest generation of aluminum, high strength steel and magnesium alloys show significant potential for light weight applications in aerospace, transportation and consumer electronic applications. However, these alloys suffer from significant corrosion problems. To address this issue, a series of nanostructured binary aluminum alloys (AlCr, AlMn, AlZr) have been prepared and tested for corrosion performance. The composition of these single-phase alloys, created via electrodeposition from ionic liquids, can be tuned to adjust microstructure and modify properties such as hardness and pitting potential in order to target application specific requirements. Here we present data on alloy composition, hardness and corrosion performance (ASTM B117 & potentiodynamic polarization) relative to the base aluminum alloys 6061 & 2070. Results show that the thermodynamically stable nanocrystalline aluminum alloys provide improved corrosion resistance as compared to the base alloys.
Key words: Aluminum, Alloy, Corrosion, Coating, Electrodeposition, Ionic Liquid