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材料と環境 Vol. 61 (2012), No. 1

ISIJ International
belloff
オンライン版ISSN: 1881-9664
冊子版ISSN: 0917-0480
発行機関: Japan Society of Corrosion Engineering

Backnumber

  1. Vol. 74 (2025)

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  2. Vol. 73 (2024)

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  3. Vol. 72 (2023)

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  4. Vol. 71 (2022)

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  7. Vol. 68 (2019)

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  8. Vol. 67 (2018)

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  9. Vol. 66 (2017)

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  10. Vol. 65 (2016)

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  11. Vol. 64 (2015)

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  12. Vol. 63 (2014)

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  19. Vol. 56 (2007)

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  24. Vol. 51 (2002)

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  25. Vol. 50 (2001)

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  26. Vol. 49 (2000)

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  27. Vol. 48 (1999)

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  28. Vol. 47 (1998)

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  29. Vol. 46 (1997)

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  30. Vol. 45 (1996)

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  31. Vol. 44 (1995)

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  32. Vol. 43 (1994)

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  33. Vol. 42 (1993)

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  34. Vol. 41 (1992)

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  35. Vol. 40 (1991)

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キーワードランキング

26 Apr. (Last 30 Days)

材料と環境 Vol. 61 (2012), No. 1

MgCl2水溶液中における鋭敏化304ステンレス鋼の局部腐食発生におよぼす応力の影響

多田 英司, 仙葉 聡

pp. 14-21

DOI:

10.3323/jcorr.61.14

抄録

In this study, the effect of applied stress on the initiation of localized corrosion and morphology transition from pits to cracks for sensitized 304 stainless steel were investigated in aqueous MgCl2 solutions. Anodic polarization curves for pre-strained specimens and electrochemical noise responses such as open circuit potential and galvanic current between stressed and unstressed specimens were measured. Anodic polarization curves for sensitized 304 stainless steel revealed that initiation of pitting corrosion were enhanced on the pre-strained samples. From the results of the electrochemical noise responses, initiation of localized corrosion were promoted on the specimens to which the stress was applied in 2 M MgCl2 solution. The morphology transition from pits to cracks was observed when plastic strain was applied during the growth of pitting corrosion.

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MgCl2水溶液中における鋭敏化304ステンレス鋼の局部腐食発生におよぼす応力の影響

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使用済核燃料模擬溶解液中におけるジルコニウムの応力腐食割れ感受性に対するクリープの影響

加藤 千明, 石島 暖大, 山本 正弘

pp. 22-28

DOI:

10.3323/jcorr.61.22

抄録

Susceptibility to stress corrosion cracking (SCC) of zirconium was investigated as for in the spent nuclear fuel dissolver environment of the reprocessing facilities. Constant load tensile tests were conducted in the nonradioactive simulated spent nuclear fuel solution in both nobler potential and boiling heat-transfer conditions. It was found that susceptibility to SCC of zirconium strongly depended on electrode potential. The time to failure clearly declined at 1.55 V (vs. SSE) and the cleavage fracture like a facet-shaped was observed. Quasi-cleavage fracture was only observed on the specimen surface less noble than 1.50 V, but the time to failure scarcely declined comparing to that of silicon oil. Decline of time to failure was also observed under boiling heat-transfer condition. However, the decline of time to failure under boiling heat-transfer condition was nearly equal to the corresponding temperature to heat-transfer condition with silicon oil. As for the index of susceptibility to SCC, the ratio of transition time from secondary to third creep to failure time indicated that the susceptibility to SCC were very high in 1.55 V. The index indicated that boiling heat-transfer scarcely enhanced the susceptibility. It's considered that SCC behavior of zirconium in spent nuclear fuel dissolver environment mainly depends on its creep property.

mendeley

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使用済核燃料模擬溶解液中におけるジルコニウムの応力腐食割れ感受性に対するクリープの影響

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mendeley

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26 Apr. (Last 30 Days)

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