Kairy, Shravan KRouxel, B.Dumbre, J.Lamb, J.Langan, T.J.Dorin, TBirbilis, Nick2023-03-200010-938Xhttp://hdl.handle.net/1885/287187The microstructural variation caused by Sc and Zr additions to a 2xxx series Al-Cu alloy was studied in the context of corrosion and hardness. The addition of Sc and Zr led to microstructural refinement, a decrease in corrosion current density, and a reduction in the extent of pitting and intergranular corrosion; whilst hardness increased. Such an improvement in properties was attributed to the variation of alloy microstructure. It was also noted that an often unreported W-phase (AlxCu5-6ScZry≈0.3), containing Zr, was ‘cathodic’ relative to the Al-matrix in the Al-Cu-Sc-Zr alloy.The authors would like to thank the Australian Research Council for funding this study (LP160100104). The Monash Centre for Electron Microscopy (MCEM) is gratefully acknowledged.application/pdfen-AU© 2019 Elsevier LtdA: AluminiumA: AlloyB: STEMB: PolarisationC: Pitting corrosionC: Intergranular corrosion201910.1016/j.corsci.2019.1080952022-01-09