| Abstract Scope |
Lightweight metals such as aluminum (Al) alloys have been widely used in various industries such as building and construction, transportation, packaging, and electrical devices due to its low density, high specific strength, good thermal and electrical conductivity, and recyclability. However, most commercial Al alloys are precipitation strengthened with compromised corrosion resistance resulting from localized galvanic coupling between the precipitates and Al matrix. In this work, we showed that, in contrary to precipitation strengthening, solid solution strengthening mechanism can be applied to simultaneously strengthen Al and improve their corrosion resistance, ultimately leading to enhanced tribocorrosion resistance. Specifically, the corrosion and tribocorrosion resistance of aluminum-manganese solid solutions were studied in simulated seawater. It was found that both the depassivation and repassivation kinetics are strongly affected by the scratching frequency and surface anodizing state during tribocorrosion. |