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材料と環境 Vol. 71 (2022), No. 5

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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  3. Vol. 71 (2022)

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  4. Vol. 70 (2021)

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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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  10. Vol. 64 (2015)

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  11. Vol. 63 (2014)

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  12. Vol. 62 (2013)

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  13. Vol. 61 (2012)

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  14. Vol. 60 (2011)

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  15. Vol. 59 (2010)

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  16. Vol. 58 (2009)

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  17. Vol. 57 (2008)

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  18. Vol. 56 (2007)

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  19. Vol. 55 (2006)

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  20. Vol. 54 (2005)

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  22. Vol. 52 (2003)

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  23. Vol. 51 (2002)

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  24. Vol. 50 (2001)

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  25. Vol. 49 (2000)

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  26. Vol. 48 (1999)

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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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  31. Vol. 43 (1994)

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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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21 Dec. (Last 30 Days)

材料と環境 Vol. 71 (2022), No. 5

薄い液膜下における鋼の腐食に及ぼす腐食抑制剤の影響

門馬 悠一郎, 坂入 正敏, 上野 文義, 大谷 恭平

pp. 133-137

DOI:

10.3323/jcorr.71.133

抄録

The effects of 0.5 mmol L－1 sodium molybdate and 0.5 mmol L－1 aluminum lactate on the corrosion of steels under 10 mmol L－1 NaCl solution layers were investigated. Electrochemical measurements were carried out using a siphon cell to form solution layers of 0.2 mm-1.0 mm thickness on the samples. From the potentiodynamic polarization measurements, the diffusion limiting current, jlim and the anodic current, janode were measured and the changes by the effects of the corrosion inhibitor were evaluated. There was no change of jlim, while janode decreased, indicating that used inhibitors reduced the anodic reaction rate. From the electrochemical impedance measurement results, impedance behavior under the solution layer was different from that in the bulk solution, and it was suggested that the protective layer structure changed with the quantity of solution.

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薄い液膜下における鋼の腐食に及ぼす腐食抑制剤の影響

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アルミニウム合金および炭素鋼の電気化学挙動に及ぼす溶液温度の影響

沈 童, 坂入 正敏

pp. 138-142

DOI:

10.3323/jcorr.71.138

抄録

Effects of temperature on electrochemical behavior of aluminum alloys and carbon steel were investigated in aerated 20 mass％ NaCl solutions at sub-zero temperatures. Rest-potentials of carbon steel shifted to positive direction with decreasing temperature, which of aluminum alloys were unaltered with temperature. Clear oxygen diffusion limiting current densities were observed in all the experimental conditions. The limiting current changes are in the order of A6061＜A1050＜carbon steel. The oxygen limiting currents of carbon steel decreases slightly with decline of temperature, which of Al alloy are independent of temperature. Electrochemical impedance spectroscopy （EIS） results of carbon steel implies that EIS behavior changes with temperature.

mendeley

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アルミニウム合金および炭素鋼の電気化学挙動に及ぼす溶液温度の影響

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非金属材料の腐食機構等のAI予測システムの開発

宮路 瑠唯, 三友 信夫, 松田 宏康, 久保内 昌敏

pp. 143-148

DOI:

10.3323/jcorr.71.143

抄録

For safe and stable operation of chemical plants, we studied the implementation of artificial intelligence to determine and evaluate damage mechanisms for damage of non-metallic materials. Existing damage cases of non-metallic materials were collected, data cleansing was performed, and decision tree analysis was conducted. In addition, the presence or absence of over-learning was also examined. As a result, with a certain number of cases, it is expected to be possible to extract conditions for determining the damage mechanism and to predict possible damage for mechanisms.

mendeley

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非金属材料の腐食機構等のAI予測システムの開発

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塗膜欠陥を有する塗装タングステン添加鋼における塗膜膨れ抑制機構

中村 直人, 三浦 進一, 塩谷 和彦

pp. 149-157

DOI:

10.3323/jcorr.71.149

抄録

In order to clarify the effect of W on suppression of paint blistering and its mechanism, analysis of rust formed on W bearing steel by corrosion test, and verification experiments such as an artificial synthesis Fe3O4, measurement of membrane potential of rust films and electrochemical measurement were conducted. As a result, W refines Fe3O4 particles which are main components of rust under paint film, and gives rust cation selective permeability. Both effects prevent corrosion factors from reaching the surface of substrate. In addition, W forms insoluble oxides and prevents Fe dissolution by inhibitory effect. These effects suppress Fe corrosion and the formation of rust, thereby suppressing paint film blistering.

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塗膜欠陥を有する塗装タングステン添加鋼における塗膜膨れ抑制機構

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マルテンサイト系ステンレス鋼の脱不働態化pHに及ぼす塩化物イオンおよび酢酸イオンの影響

神吉 恭平, 相良 雅之, 原 卓也

pp. 158-164

DOI:

10.3323/jcorr.71.158

抄録

The effects of chloride ion, acetate ion and Mo addition on the depassivation pH （pHd） of martensitic stainless steel were investigated using anodic polarization measurement and surface film analysis （XPS）. The increase of chloride ion concentration promoted partial destruction of the film and obscured the transition from active state to passive state. The increasing of acetate ion concentration increased the pHd and acted as a negative factor for passivation. It is considered that the addition of Mo lowered the pHd and promoted the formation of passivation film in a high-concentration acetic acid environment.

mendeley

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マルテンサイト系ステンレス鋼の脱不働態化pHに及ぼす塩化物イオンおよび酢酸イオンの影響

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