High corrosion resistant Ti–5%Ta–1.8%Nb alloy for fuel reprocessing application

Kapoor, K.; Kain, Vivekanand; Gopalkrishna, T; Sanyal, Tapobrata; De, P.K.

doi:10.1016/s0022-3115(03)00302-7

Cited by 65 publications

(37 citation statements)

References 3 publications

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“…The corrosion rate in liquid and vapor phases of the welded T-4Nb-4Zr was lower than Ti-5Ta-1.8Nb in spite of the fact that the iron content in the newly developed alloy was sufficiently high (1450 ppm as opposed to 210 ppm). [16] A similar observation was noticed in the potentiodynamic studies of the weld region ( Figure 8). This superior behavior can be attributed to the formation of stable protective oxide layers by the alloying elements and lesser amount of beta phase when compared to other alloys.…”

Section: Corrosion Behavior Of the Welded Alloyssupporting

confidence: 84%

“…[13][14][15] Currently, Ti-based alloys such as Ti-Ta and Ti-5Ta-1.8Nb are under development as they exhibit enhanced corrosion resistance compared to conventional alloys and, hence, are considered for the fabrication of the dissolvers and evaporators of the fast breeder reactor (FBR) fuel reprocessing plant. [2,7,10,16] Although possessing the required corrosion resistance, the presence of tantalum in Ti-Ta-Nb alloy renders it rather expensive due to the scarce availability of tantalum. In addition, the presence of high content of beta alloying elements such as Ta and Nb lead to the formation of more beta phase, resulting in two-phase microstructure.…”

Section: Introductionmentioning

confidence: 99%

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Corrosion-Resistant Ti-xNb-xZr Alloys for Nitric Acid Applications in Spent Nuclear Fuel Reprocessing Plants

Manivasagam

Anbarasan

Mudali

et al. 2011

Metall Mater Trans A

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This article reports the development, microstructure, and corrosion behavior of two new alloys such as Ti-4Nb-4Zr and Ti-2Nb-2Zr in boiling nitric acid environment. The corrosion test was carried out in the liquid, vapor, and condensate phases of 11.5 M nitric acid, and the potentiodynamic anodic polarization studies were performed at room temperature for both alloys. The samples subjected to three-phase corrosion testing were characterized using scanning electron microscopy (SEM) and energy-dispersive X-ray microanalysis (EDAX). As Ti-2Nb-2Zr alloy exhibited inferior corrosion behavior in comparison to Ti-4Nb-4Zr in all three phases, weldability and heat treatment studies were carried out only on Ti-4Nb-4Zr alloy. The weldability of the new alloy was evaluated using tungsten inert gas (TIG) welding processes, and the welded specimen was thereafter tested for its corrosion behavior in all three phases. The results of the present investigation revealed that the newly developed near alpha Ti-4Nb-4Zr alloy possessed superior corrosion resistance in all three phases and excellent weldability compared to conventional alloys used for nitric acid application in spent nuclear reprocessing plants. Further, the corrosion resistance of the beta heat-treated Ti-4Nb-4Zr alloy was superior when compared to the sample heat treated in the alpha + beta phase.

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Section: Corrosion Behavior Of the Welded Alloyssupporting

confidence: 84%

Section: Introductionmentioning

confidence: 99%

Corrosion-Resistant Ti-xNb-xZr Alloys for Nitric Acid Applications in Spent Nuclear Fuel Reprocessing Plants

Manivasagam

Anbarasan

Mudali

et al. 2011

Metall Mater Trans A

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“…They suggested that this phenomenon was accelerated in the presence of Cl À ions in solution. Moreover, it also was demonstrated that enrichment of b phase in Nb and Ta resulted in superior corrosion resistance and passivity compared with the enrichment of b phase in V. [32] This improvement by Nb and Ta was attributed to the annihilation of anion vacancies in the crystal lattice of titanium oxide. [31] The corrosion rate of the SZ in the FS-processed condition was similar to that of the BM (Figure 9).…”

Section: Discussionmentioning

confidence: 98%

Corrosion Behavior of Friction Stir-Processed and Gas Tungsten Arc-Welded Ti-6Al-4V

Atapour

Pilchak

Frankel

et al. 2010

Metall Mater Trans A

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The corrosion behavior of the investment-cast Ti-6Al-4V alloy in 5-pct HCl solution was investigated after gas tungsten arc welding and friction stir (FS) processing. The FS-processed samples exhibited superior corrosion behavior compared with the base metal and the arc-welded samples. The inferior corrosion resistance of the arc weldment was attributed to the acicular a and b microstructure and the alloying element partitioning between the phases. This was confirmed by scanning electron microscopy evaluations of the surface of specimens that had been immersed 50 hours in 20-pct HCl at 308 K (35°C). In addition, the results indicated that vanadium as an alloying element has a detrimental effect on the corrosion performance of Ti6Al-4V alloy in an HCl solution.

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“…However, using titanium and its alloys under extreme conditions, such as boiling solutions of nitric acid, is restricted due to their low corrosion resistance [4]. Alloying titanium with refractory elements, such as niobium and tantalum, leads to increasing corrosion resistance [5][6][7]. At the same time, alloying with niobium is more preferable, since this element is similar to tantalum in corrosion characteristics in oxidizing acid solutions, but it is considerably lighter and cheaper.…”

Section: Introductionmentioning

confidence: 99%

Structure and corrosion resistance of Ti-Nb layers obtained by non-vacuum electron-beam cladding on CP titanium substrates

Polyakov¹,

Krivezhenko²,

Samoylenko³

et al. 2016

AIP Conference Proceedings

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High corrosion resistant Ti–5%Ta–1.8%Nb alloy for fuel reprocessing application

Cited by 65 publications

References 3 publications

Corrosion-Resistant Ti-xNb-xZr Alloys for Nitric Acid Applications in Spent Nuclear Fuel Reprocessing Plants

Corrosion-Resistant Ti-xNb-xZr Alloys for Nitric Acid Applications in Spent Nuclear Fuel Reprocessing Plants

Corrosion Behavior of Friction Stir-Processed and Gas Tungsten Arc-Welded Ti-6Al-4V

Structure and corrosion resistance of Ti-Nb layers obtained by non-vacuum electron-beam cladding on CP titanium substrates

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