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材料と環境 Vol. 68 (2019), No. 12

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. 73 (2024)

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  2. Vol. 72 (2023)

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  5. Vol. 69 (2020)

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  6. Vol. 68 (2019)

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  7. Vol. 67 (2018)

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  8. Vol. 66 (2017)

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  9. Vol. 65 (2016)

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  19. Vol. 55 (2006)

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  22. Vol. 52 (2003)

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  27. Vol. 47 (1998)

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  28. Vol. 46 (1997)

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  29. Vol. 45 (1996)

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  30. Vol. 44 (1995)

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  32. Vol. 42 (1993)

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  33. Vol. 41 (1992)

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  34. Vol. 40 (1991)

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キーワードランキング

03 Dec. (Last 30 Days)

材料と環境 Vol. 68 (2019), No. 12

腐食減肉量とAE波の伝播モードの関連性評価

栗原 卓哉, 鏡 拓真, 松尾 卓摩, 鴻野 太郎, 中里 直人

pp. 342-346

DOI:

10.3323/jcorr.68.342

抄録

Corrosion loss evaluation method for steel structure was investigated by acoustic emission （AE） signals with characteristics of Lamb wave. Relationship between wavelet coefficient of S0 mode of Lamb wave AE signals and AE source depth were evaluated. The amplitude of the S0 mode becomes higher as the AE source become closer to the thickness center. Thus, the corrosion depth can be evaluated by the strength ratio of S0 mode and A0 mode of Lamb wave AE signals.

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腐食減肉量とAE波の伝播モードの関連性評価

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Bibtex

Ris

塩化物液滴下におけるステンレス鋼の孔食発生・成長過程の観察―孔食発生・成長・再不働態化におよぼすS含有量の影響―

大井 梓, 伊勢 八起, 多田 英司, 西方 篤

pp. 347-354

DOI:

10.3323/jcorr.68.347

抄録

A system that can stop pit growth automatically at any time after the pit initiation under a chloride solution droplet was developed. Using this system, atmospheric pitting corrosion of austenitic stainless steels with various sulfur （S） concentrations was investigated. It was confirmed that initiation site of pitting corrosion was manganese sulfide （MnS） inclusions under the droplets regardless of S concentrations. In addition, the growth behavior of the active dissolution area doesn't also depend on S concentrations. When these specimens were subjected to wet-dry cycle tests, probability of pitting corrosion increases with S concentrations due to increasing initiation site, and there is no clear difference in chloride concentrations for onset of the pitting corrosion. On the other hand, repassivation behavior is strongly depends on S concentrations.

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塩化物液滴下におけるステンレス鋼の孔食発生・成長過程の観察―孔食発生・成長・再不働態化におよぼすS含有量の影響―

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