氢与双相不锈钢相界的相互作用对腐蚀的影响

IF 1.1 4区材料科学 Q4 MATERIALS SCIENCE, MULTIDISCIPLINARY

Corrosion Pub Date : 2024-02-22 DOI:10.5006/4519

Houwei Zhang, Qing Zheng, Dengyun Wang, Ming Liu, Gang Li, Lining Xu, Lijie Qiao

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引用次数: 0

摘要

本研究模拟了 2205 双相不锈钢在实际使用环境中的充氢/释放循环行为。通过电化学和浸泡实验，比较了 2205 双相不锈钢在单次充氢和多次充氢/释放循环下的点蚀敏感性和腐蚀行为。结果表明，在单次充氢条件下，点蚀优先在奥氏体相中产生和扩展；这一结果与之前的研究结果一致。然而，在循环充氢/释氢过程中，凹坑会在相界处产生并沿着相界扩展。此外，还利用氢显微印迹技术对 2205 双相不锈钢中的氢富集点进行了表征。结果表明，凹坑优先在相同的氢富集位点产生。研究绘制了氢再分布示意图，并假设在实际使用条件下，相界而非奥氏体相是点蚀的主要部位，因为相界已从氢阱转变为氢富集部位。

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Influence of the interaction of hydrogen with the phase boundary of duplex stainless steel on corrosion

This study simulates the behavior of 2205 duplex stainless steel in an actual service environment under hydrogen charging/releasing cycles. Electrochemical and immersion experiments are conducted to compare the pitting susceptibility and corrosion behavior of 2205 DSS under single hydrogen charging and several hydrogen charging/releasing cycles. The results reveal that under single hydrogen charging, pits preferentially initiate and propagate within the austenite phase; this finding is consistent with the results of previous studies. However, under cyclic hydrogen charging/releasing cycles, pits initiate at the phase boundary and propagate along it. Moreover, a hydrogen microprint technique is used to characterize the hydrogen enrichment sites in 2205 duplex stainless steel. The results demonstrate that pits preferentially initiate at the same hydrogen enrichment sites. The study creates a schematic of hydrogen redistribution and hypothesizes that under actual service conditions, the phase boundary, rather than the austenite phase, is the primary site for pitting corrosion because of its transformation into a hydrogen enrichment site from a hydrogen trap.

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来源期刊

Corrosion MATERIALS SCIENCE, MULTIDISCIPLINARY-METALLURGY & METALLURGICAL ENGINEERING

CiteScore

2.80

自引率

12.50%

发文量

审稿时长

3 months

期刊介绍： CORROSION is the premier research journal featuring peer-reviewed technical articles from the world’s top researchers and provides a permanent record of progress in the science and technology of corrosion prevention and control. The scope of the journal includes the latest developments in areas of corrosion metallurgy, mechanisms, predictors, cracking (sulfide stress, stress corrosion, hydrogen-induced), passivation, and CO2 corrosion. 70+ years and over 7,100 peer-reviewed articles with advances in corrosion science and engineering have been published in CORROSION. The journal publishes seven article types – original articles, invited critical reviews, technical notes, corrosion communications fast-tracked for rapid publication, special research topic issues, research letters of yearly annual conference student poster sessions, and scientific investigations of field corrosion processes. CORROSION, the Journal of Science and Engineering, serves as an important communication platform for academics, researchers, technical libraries, and universities. Articles considered for CORROSION should have significant permanent value and should accomplish at least one of the following objectives: • Contribute awareness of corrosion phenomena, • Advance understanding of fundamental process, and/or • Further the knowledge of techniques and practices used to reduce corrosion.