Corrosion behavior of an in situ consolidated nanocrystalline Al-V alloy

C. S. Witharamage, J. Christudasjustus, J. Smith, W. Gao, R. K. Gupta

Research output: Contribution to journalArticlepeer-review

20 Scopus citations

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 languageEnglish
Article number15
Journalnpj Materials Degradation
Volume6
Issue number1
DOIs
StatePublished - Dec 2022
Externally publishedYes

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.

Fingerprint

Dive into the research topics of 'Corrosion behavior of an in situ consolidated nanocrystalline Al-V alloy'. Together they form a unique fingerprint.

Cite this