| アイテムタイプ |
共通アイテムタイプ(1) |
| 公開日 |
2025-07-25 |
| タイトル |
|
|
タイトル |
Effect of water temperature in the deep sea on the mitigation of hydrogen embrittlement by O2 impurity |
|
言語 |
en |
| 著者 |
薦田, 亮介
Kubota, Masanobu
Staykov, Aleksandar
Zhang, Nan
Wada, Kentaro
|
| 著作権関連情報 |
|
|
権利情報 |
Copyright (c) 2025 Elsevier Ltd. All rights are reserved, including those for text and data mining, AI training, and similar technologies. |
|
言語 |
en |
| 抄録 |
|
|
内容記述タイプ |
Abstract |
|
内容記述 |
The addition of trace amounts of oxygen (O2) to hydrogen gas (H2) can mitigate hydrogen embrittlement (HE) in steels by suppressing the hydrogen uptake. In this study, the influence of temperature on the HE mitigation effect of O2 was investigated using fracture toughness tests of SCM440 low-alloy steel in H2 environments containing volume ppm-levels of O2 at 293 K and 277 K. Lowering the temperature from 293 K to 277 K enhanced the HE in pure H2. However, the addition of O2 to the H2 effectively mitigated the HE, with the mitigation effect becoming more pronounced at lower temperatures. This temperature-dependent mitigation is attributed to the different adsorption behaviors of H2 and O2 on the iron surface. O2 adsorption onto iron occurs without an activation barrier, making it essentially temperature-independent. In contrast, H2 adsorption requires overcoming an activation barrier and thus decreases with a lower temperature. Consequently, decreasing the temperature selectively suppresses H2 adsorption while leaving O2 adsorption unaffected, thus enhancing the relative effect of O2. Furthermore, the presence of O2 increases the activation barrier for H2 adsorption, which amplifies the temperature dependence of the H2 adsorption. These dual effects contribute to the enhanced HE mitigation by O2 at lower temperatures. |
|
言語 |
en |
| 書誌情報 |
en : Engineering Failure Analysis
巻 180,
p. 109885,
発行日 2025-07-12
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| 出版社 |
|
|
出版者 |
Elsevier |
|
言語 |
en |
| キーワード |
|
|
言語 |
en |
|
主題Scheme |
Other |
|
主題 |
Hydrogen embrittlement |
| キーワード |
|
|
言語 |
en |
|
主題Scheme |
Other |
|
主題 |
Impurity |
| キーワード |
|
|
言語 |
en |
|
主題Scheme |
Other |
|
主題 |
Oxygen |
| キーワード |
|
|
言語 |
en |
|
主題Scheme |
Other |
|
主題 |
Temperature |
| キーワード |
|
|
言語 |
en |
|
主題Scheme |
Other |
|
主題 |
Fracture toughness |
| キーワード |
|
|
言語 |
en |
|
主題Scheme |
Other |
|
主題 |
Low-alloy steel |
| 言語 |
|
|
言語 |
eng |
| 資源タイプ |
|
|
資源タイプ識別子 |
http://purl.org/coar/resource_type/c_6501 |
|
資源タイプ |
journal article |
| 出版タイプ |
|
|
出版タイプ |
AM |
|
出版タイプResource |
http://purl.org/coar/version/c_ab4af688f83e57aa |
| DOI |
|
|
|
識別子タイプ |
DOI |
|
|
関連識別子 |
https://doi.org/10.1016/j.engfailanal.2025.109885 |
| ISSN |
|
|
収録物識別子タイプ |
PISSN |
|
収録物識別子 |
1350-6307 |
| ISSN |
|
|
収録物識別子タイプ |
EISSN |
|
収録物識別子 |
1873-1961 |
| 研究者情報 |
|
|
URL |
https://hyokadb02.jimu.kyutech.ac.jp/html/100001640_ja.html |
| 論文ID（連携） |
|
|
値 |
10461970 |
| 連携ID |
|
|
値 |
14713 |
10461970.pdf (1.6 MB)
