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材料と環境 Vol. 71 (2022), No. 10

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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  14. Vol. 60 (2011)

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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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  21. Vol. 53 (2004)

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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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  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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キーワードランキング

21 Nov. (Last 30 Days)

材料と環境 Vol. 71 (2022), No. 10

腐食分野に携わる技術者として

野瀬 清美

pp. 273-274

DOI:

10.3323/jcorr.71.273

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腐食分野に携わる技術者として

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mendeley

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Ris

ZnCl2水溶液の乾湿繰り返しにより調製した人工亜鉛さび粒子の構造と形態

田中 秀和, 山本 彩未, 石川 達雄, 中山 武典

pp. 279-283

DOI:

10.3323/jcorr.71.279

抄録

To simulate the atmospheric corrosion of galvanized steels in salinity environment, artificial zinc rust particles were prepared by repeating wet-dry cycle of aqueous ZnCl2 solutions in the presence of zinc rusts such as ZnO and Hydrozincite （Zn5（OH）6（CO3）2: HZ）, and the transformation behavior of added ZnO and HZ into zinc hydroxychloride （Zn5（OH）8Cl2･H2O: ZHC） was examined. The procedure constitutes one cycle of wetting（20℃ and 4 h） and drying （85℃ and 20 h）. After 1 cycle, almost all the added ZnO and HZ were transformed into ZHC and its transformation rate was in the order of ZnO＞HZ. Increasing the wet-dry cycles enhanced the crystallization and particle growth of ZHC and turned the irregular-shaped ZHC particles into plate-like ZHC ones. These results allow us to infer that initial zinc rusts such as ZnO and HZ generated on the galvanized steels by atmospheric corrosion in salinity environment at initial corrosion stage are immediately transformed into plate-like ZHC rust particles, which form a dense protective rust layer on the steels to enhance the corrosion resistance.

mendeley

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ZnCl2水溶液の乾湿繰り返しにより調製した人工亜鉛さび粒子の構造と形態

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mendeley

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Ris

CO2分圧と乾燥条件がモルタルの中性化の進行へ及ぼす影響

横山 勇気, 土井 康太郎, 廣本 祥子

pp. 284-287

DOI:

10.3323/jcorr.71.284

抄録

This study investigated the influence of the drying condition of the mortar specimens and the CO2 partial pressure during accelerated carbonation tests on the carbonation. The results show that when the change of the specimen’s mass due to drying was large and the CO2 partial pressure was high, the carbonation progress increased. Following the accelerated carbonation test, hyperbaric-oxygen accelerated corrosion tests were conducted. As a result, the steel embedded in the mortar specimens was corroded when the carbonation depth was almost the same as the mortar cover.

mendeley

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CO2分圧と乾燥条件がモルタルの中性化の進行へ及ぼす影響

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PEM形水電解環境中における金めっきされたチタンセパレータの耐食性評価

箕浦 歩夢, 熊谷 昌信, 宇部 卓司, 八代 仁, 村瀬 正次

pp. 288-291

DOI:

10.3323/jcorr.71.288

抄録

Corrosion resistance and interfacial contact resistance （ICR） of titanium （Ti） bipolar plates for polymer electrolyte menbrane water electrolysis （PEMWE） with different Au plating thickness were evaluated by potentiostatic polarization in a sulfuric acid solution of pH 3.0. No dissolution of Ti was detected by the ICP-MS analysis （＜1μg dm－3） when the Au plating thickness was 0.3μm or more. In the case of Ti with Au plating thickness of 0.1μm, Ti dissolved in the plating defects which were confirmed by ULV-SEM observation. The ICR increased after polarization test for Ti without plating, but not for Au plated Ti even with thickness of 0.1μm. These results indicate that microdefects in the plating layer can be starting points of dissolution of substrate, but do not immediately affect the increase in ICR as far as most of the surface remains covered.

mendeley

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PEM形水電解環境中における金めっきされたチタンセパレータの耐食性評価

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Ris

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21 Nov. (Last 30 Days)

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