Experimental and Modeling Analysis of Hydrogen Motion Behavior in Welding Zone of 2.25Cr–1Mo–0.25 V Steel Welded Joint with Hydrogen Corrosion

Yin Changdong; Ye Dongdong; Xu ZhouChen JianjunWu YiwenLiu HouliGe XinLiu QiangZeng Guiling

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Experimental and Modeling Analysis of Hydrogen Motion Behavior in Welding Zone of 2.25Cr–1Mo–0.25 V Steel Welded Joint with Hydrogen Corrosion

机译：Experimental and Modeling Analysis of Hydrogen Motion Behavior in Welding Zone of 2.25Cr–1Mo–0.25 V Steel Welded Joint with Hydrogen Corrosion

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Abstract Understanding and solving the problem of hydrogen damage due to the degradation of service performance of high-strength steel caused by hydrogen penetration is a milestone for the reliability improvement of high-end hydrogen energy equipment. From the perspective of microscopic hydrogen movement behavior, this study investigated the permeability of hydrogen in base metal (BM) and welded metal (WM) of 2.25Cr–1Mo–0.25?V steel welded joint through electrochemical hydrogen permeation test, and the analytical models of hydrogen penetration and hydrogen diffusion in the welding zone were established, and the effect of adding hydrogen-resistant coatings (HRCs) on hydrogen movement behavior in steel substrate was studied. The results showed that the diffusivity of hydrogen in WM of the welded joint was significantly lower than that in BM, and the hydrogen concentration in BM was higher than that in WM at the beginning of hydrogenation without the addition of HRCs protection, while it tended to be consistent at the later stage. However, the hydrogen concentration in WM was lower than that in BM after adding HRCs and would be always higher than that in BM after a certain period of time, and the difference was directly related to the hydrogen resistance of the coatings. Additionally, the difference between the intermediate and outer layers for the welding zone steel substrate with and without HRCs presented a trend of rapid increase followed by a slow decrease. These findings could provide an important reference value for hydrogen damage protection measures and related researches on HRCs.Graphic Abstract

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《Metals and Materials International》 |2023年第8期|2242-2256|共15页
作者
Yin Changdong; Ye Dongdong; Xu ZhouChen JianjunWu YiwenLiu HouliGe XinLiu QiangZeng Guiling;
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作者单位

Wuhu Institute of Technology;

Anhui Polytechnic University;

East China University of Science and Technology;

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原文格式 PDF
正文语种英语
中图分类金属材料;
关键词
2.25Cr-1Mo-0.25 V steel welded joint; Hydrogen embrittlement (HE); Hydrogen permeability; Hydrogen diffusion; Hydrogen-resistant coatings (HRCs);

Experimental and Modeling Analysis of Hydrogen Motion Behavior in Welding Zone of 2.25Cr–1Mo–0.25 V Steel Welded Joint with Hydrogen Corrosion

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