Abstract
Supersaturated solid solutions of Al and corrosion-resistant alloying elements (M: V, Mo, Cr, Ti, Nb), produced by non-equilibrium processing techniques, have been reported to exhibit high corrosion resistance and strength. The corrosion mechanism for such improved corrosion performance has not been well understood. We present a fundamental understanding of the role of V in corrosion of an Al-V alloy, which will provide a theoretical background for developing corrosion-resistant Al alloys. High-energy ball milling of the elemental powder of Al and V produced an in situ consolidated Al-V alloy, which exhibited high solid solubility of V. The corrosion resistance of Al-V alloy was significantly higher than that of pure Al, which was attributed to the (1) enrichment of V at the passive film/substrate interface, (2) incorporation of V into the passive film, and (3) deposition of V on the iron-containing cathodic particles and therefore, retardation of cathodic reaction.
Original language | English |
---|---|
Article number | 15 |
Journal | npj Materials Degradation |
Volume | 6 |
Issue number | 1 |
DOIs | |
State | Published - Dec 2022 |
Externally published | Yes |
Funding
The financial support from the National Science Foundation (NSF-CMMI 1760204 and NSF-CMMI 2131440) under the direction of Dr. Alexis Lewis is highly acknowledged. The authors would like to acknowledge the Analytical Instrument Facility (AIF) at North Carolina State University to facilitate the SEM, FIB, and XRD tests.