高强度镍基合金在含 KOH 与 LiOH 的压水堆原水中的应力腐蚀裂纹

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

Corrosion Pub Date : 2024-01-16 DOI:10.5006/4460

Z. Zhai, Ferdinan Cintron-Colon, Ryan A. Bouffioux, M. Toloczko

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引用次数: 0

摘要

对高强度镍基合金 X-750 和合金 718 的应力腐蚀开裂行为进行了研究，以评估在压水堆（PWR）一回路冷却剂中用 KOH 取代 LiOH 作为 pH 值调节剂的效果。在含有 LiOH 或 KOH 的压水堆一回路水中，通过多拉伸试样恒载试验对 X-750 的 SCC 引发行为进行了评估。在三种不同的压水堆一次水化学成分中，在含 LiOH 和 KOH 的水之间快速变化的紧凑拉伸试样上，对 X-750 和合金 718 的 SCC 生长行为进行了评估。在 SCC 起始和扩展试验中，分别使用了直流电位降技术对裂纹起始时间和裂纹扩展进行原位监测。结果表明，KOH 与 LiOH 对测试材料的 SCC 起始或扩展没有明显影响。

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Stress Corrosion Cracking of High-Strength Ni-Base Alloys in PWR Primary Water Containing KOH vs. LiOH

The stress corrosion cracking behavior of high-strength Ni-base Alloy X-750 and Alloy 718 has been investigated to assess the effect of replacing LiOH with KOH as the pH moderator in pressurized water reactor (PWR) primary circuit coolant. The SCC initiation behavior of X-750 was evaluated by multi-tensile specimen constant load test in either LiOH- or KOH- containing PWR primary water. The SCC growth behavior of X-750 and Alloy 718 was evaluated on compact tension specimens with on-the-fly changes between LiOH- and KOH-containing water in three different PWR primary water chemistries. Direct current potential drop technique was used for in-situ monitoring of crack initiation time and crack extension in SCC initiation and propagation tests, respectively. The results suggest no significant effect of KOH vs. LiOH on the SCC initiation or propagation of the tested materials.

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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.