Corrosion resistance of zirconium and zirconium-titanium alloy in hot nitric acid

Nagano, Hiroo; Kajimura, Haruhiko; Yamanaka, Kazuo

doi:10.1016/0921-5093(95)80067-5

Cited by 31 publications

(16 citation statements)

References 10 publications

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“…The passive film of TiO 2 formed on Ti-5Ta alloy is more stable against localized corrosion than that of ZrO 2 formed on zirconium. 10) As can be seen in Table 3, the slip systems of titanium are {1010}, {1011} and {0001}, and that of zirconium is only {1010}. 17,18) Zirconium and Ti-5Ta alloy used in this study had the same grain size.…”

Section: Relation Between Scc and Corrosion Fatiguementioning

confidence: 89%

“…This concentration is the minimum value for showing the SCC susceptibility in zirconium 10) and corresponds to the nitric acid concentration at a dissolver in reprocessing plants. 13) The fatigue test was conducted at boiling point 378 K under free corrosion potential.…”

Section: Environmentsmentioning

confidence: 99%

“…1,2) Ti-5Ta alloy and niobium have little susceptibility to stress corrosion cracking (SCC) in boiling nitric acid solution, 3,4) however zirconium has the SCC susceptibility. [4][5][6][7][8][9][10][11] Recently, zirconium and Ti-5Ta alloy have been applied to the equipment of nuclear spent fuel reprocessing plants, 12,13) where a large amount of nitric acid is used. And so the fatigue behavior should be evaluated for the reliability of spent fuel reprocessing plant components made of these materials by considering the cyclic stress due to the practical operation.…”

Section: Introductionmentioning

confidence: 99%

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Corrosion Fatigue of Refractory Materials in Boiling Nitric Acid

Motooka

Kiuchi

2002

Mater. Trans.

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Refractory materials such as zirconium, niobium and titanium alloys with excellent corrosion resistance in boiling nitric acid have been selected for use as structural materials of spent fuel reprocessing equipment. In this study, the fatigue crack growth rates of these materials were investigated by load control tests as a function of the stress intensity factor range in boiling 3 kmol/m 3 nitric acid and in air at room temperature. The fracture surfaces were observed by scanning electron microscopy. The fatigue crack growth rates of zirconium and niobium were enhanced in boiling nitric acid compared with those in air at room temperature. Acceleration effect due to corrosion fatigue was not observed in the crack growth of Ti-5Ta alloy. The fracture surfaces of Ti-5Ta alloy showed the ductile striation in both environments. On the other hand, the fracture surfaces of niobium represented the fatigue striation in air and the brittle striation due to corrosion in nitric acid. The fracture surfaces of zirconium in nitric acid showed brittle fracture and the ductile fracture related to stress corrosion cracking.

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Section: Relation Between Scc and Corrosion Fatiguementioning

confidence: 89%

Section: Environmentsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Corrosion Fatigue of Refractory Materials in Boiling Nitric Acid

Motooka

Kiuchi

2002

Mater. Trans.

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“…It is reported that the oxide film on Ti-5Ta-1.8Nb alloy contains not only the titanium oxide (TiO 2 ) but also the oxide of these refractory metals (Ta 2 O 5 and Nb 2 O 5 ) [9,10]. In addition, the oxide film is protective, stable, adherent and continuous [11].…”

Section: Introductionmentioning

confidence: 99%

Structure of the oxide film on Ti–6Ta alloy after immersion test in 8mol/L boiling nitric acid medium

Guo

Yang

et al. 2013

Journal of Electron Spectroscopy and Related Phenomena

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“…Present generation of reprocessing plants uses AISI type 304L SS, and its upgraded varieties, titanium and its alloys, and zirconium as structural materials for nitric acid services. However, problems associated with such type of materials are many such as, sensitization related corrosion problems in welds of dissimilar metals, grain boundary dissolution as well as intergranular corrosion in stainless steel components, vapor phase corrosion of titanium, and stress corrosion cracking of zirconium in hot nitric acid [15][16][17][18][19]. All these corrosion related problems limit the life span of structural materials, and hence has direct impact on plant production.…”

Section: Introductionmentioning

confidence: 99%