| Abstract Scope |
Nano-treatment has emerged as a strategy to enable the liquid processing of high-strength aluminum alloys, yet its subsequent effects on anodization remain largely unexamined. This is particularly vital for 6000- and 7000-series alloys, which rely on anodization for aesthetics, wear resistance, and corrosion protection. Copper-containing AA7075 faces an additional challenge, as copper imparts an undesirable yellow tint to the oxide. This study investigates the role of nanoparticles in governing the electrochemical response and structural evolution of the anodic oxide layer in AA6063 and AA7075. We demonstrate that incorporating TiC nanoparticles induces the formation of a partially crystalline oxide structure, leading to a denser oxide layer. Additionally, the nano-treated AA7075 exhibits resistance to copper-induced yellowing, driven by the refinement of copper-bearing secondary phases. The synergistic effects of altered oxide formation and secondary phase refinement yield an anodized surface with improved aesthetics and structural durability, expanding the applications for high-strength aluminum alloys. |