Journal
CORROSION SCIENCE
Volume 158, Issue -, Pages -Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.corsci.2019.108095
Keywords
Aluminium; Alloy; STEM; Polarisation; Pitting corrosion; Intergranular corrosion
Funding
- Australian Research Council [LP160100104]
- Australian Research Council [LP160100104] Funding Source: Australian Research Council
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The 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.
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