A corrosion fatigue study of zirconium in hot nitric acid

Popp, W.

doi:10.1016/0010-938x(93)90196-n

Cited by 2 publications

(2 citation statements)

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“…7,9,11) The general corrosion resistance of zirconium is superior to that of Ti-5Ta alloy and niobium on immersion tests. The chemical stability of passive film of zirconium is given in the polarization curve of Fig.…”

Section: Relation Between Scc and Corrosion Fatiguementioning

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: 99%