Age-hardening behavior, corrosion mechanisms, and passive film structure of nanocrystalline Al-V supersaturated solid solution

Effect of V Content on Corrosion Behavior of Al-V Alloys Produced by Mechanical Alloying and Subsequent Spark Plasma Sintering

“…A significant improvement of pitting potential in SPSed Al-xV alloys compared to that in pure Al could be attributed to the (1) cathodic reaction control due to the deposition of V on cathodic sites and (2) controlled pit growth and repassivation in the early stage of pits due to the V enrichment underneath pits. 24,27 Interestingly, the average current densities at − 580 mV SCE were significantly reduced in Al-2V (0.08 ± 0.03) μA cm −2 and Al-5V (0.06 ± 0.03) μA cm −2 after 14 days of immersion, as compared to them in 30 min of immersion. The E pit for Al-2V and Al-5V were (183 ± 47) mV SCE and (207 ± 44) mV SCE , respectively, after 14 days of immersion.…”

Influence of vanadium addition on corrosion behavior of high‐energy ball milled aluminum alloy 2024

“…X-ray photoelectron spectroscopy and Mott-Schottky analysis in Al-V alloys revealed the presence of oxidized V (V +3 , V +4 , V +5 ) within the passive film and a decrease in point defect concentration. [13,16,26] Witharamage et al [13] have analyzed pits formed in an in-situ consolidated Al-V alloy and reported the deposition of V on cathodic Fe-rich particles. Similarly, Christudasjustus et al [26] reported the deposition of V on cathodic C-rich phases, which was considered to result in high corrosion resistance.…”

“…[13,16,26] Witharamage et al [13] have analyzed pits formed in an in-situ consolidated Al-V alloy and reported the deposition of V on cathodic Fe-rich particles. Similarly, Christudasjustus et al [26] reported the deposition of V on cathodic C-rich phases, which was considered to result in high corrosion resistance. In the present study, the accumulation of V in the pits around the Fe-rich particles (Figure 6) indicates the release of V within the pit, which could subsequently deposit on Fe-rich particles, decrease the cathodic activity, and lead to repassivation.…”

“…[3,23] On the other hand, several studies [12][13][14]24,25] have reported success in producing corrosion-resistant Al alloys with high solid solubility of V. Ability of V in suppressing the cathodic activity of Ferich and C-rich particles was attributed to enhanced corrosion resistance. [13,26] C was introduced from the process controlling agent whereas Fe-rich particles were a result of abrasion of milling media. [13,26] Therefore, HEBM of AA2024 alloy with V addition is promising to enhance the corrosion resistance.…”

“…[13,26] C was introduced from the process controlling agent whereas Fe-rich particles were a result of abrasion of milling media. [13,26] Therefore, HEBM of AA2024 alloy with V addition is promising to enhance the corrosion resistance. In the present study, the microstructure, hardness, and corrosion of the Vadded high-energy ball-milled AA2024 alloy have been investigated.…”