Static corrosion of stainless steel 316H in chemically purified molten NaF-KF-UF4 salt

IF 6.6 2区材料科学 Q1 MATERIALS SCIENCE, MULTIDISCIPLINARY

npj Materials Degradation Pub Date : 2024-05-29 DOI:10.1038/s41529-024-00457-7

Jaewoo Park, Amanda Leong, Jinsuo Zhang

引用次数: 0

Abstract

The purification of salt is indispensable for mitigating the corrosion of structural materials for molten salt reactors or other molten salt applications. This study develops a salt-purification system to synthesize and purify NaF-KF-UF4 salt (FUNaK) using Ar purging and hydrofluorination of impurities. Chronoamperometry is also used to remove metallic impurities in the hydrofluorinated FUNaK. This purified FUNaK is then used for a static corrosion test of stainless steel 316H (SS316H) to study the effectiveness of salt purification in mitigating its corrosion. For comparison, results from a previous study about the corrosion of SS316H by thermally purified FUNaK are used. FUNaK with UF3 is also synthesized for a static corrosion test with the same condition to investigate the impact of UF3 on corrosion. The results show that the corrosion of SS316H is significantly reduced by using the chemically purified FUNaK compared to thermally purified FUNaK.

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不锈钢 316H 在化学纯化的熔融 NaF-KF-UF4 盐中的静态腐蚀

要减轻熔盐反应堆或其他熔盐应用中结构材料的腐蚀，盐的纯化是不可或缺的。本研究开发了一种盐纯化系统，利用氩气吹扫和氢氟化杂质来合成和纯化 NaF-KF-UF4 盐 (FUNaK)。此外，还利用时变测量法去除氢氟化 FUNaK 中的金属杂质。净化后的 FUNaK 将用于 316H 不锈钢（SS316H）的静态腐蚀试验，以研究盐净化在减轻其腐蚀方面的效果。为了进行比较，还使用了之前关于热纯化 FUNaK 对 SS316H 的腐蚀的研究结果。还合成了含有 UF3 的 FUNaK，在相同条件下进行静态腐蚀试验，以研究 UF3 对腐蚀的影响。结果表明，与热纯化的 FUNaK 相比，使用化学纯化的 FUNaK 能显著减少 SS316H 的腐蚀。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

npj Materials Degradation MATERIALS SCIENCE, MULTIDISCIPLINARY-

CiteScore

7.80

自引率

7.80%

发文量

审稿时长

6 weeks

期刊介绍： npj Materials Degradation considers basic and applied research that explores all aspects of the degradation of metallic and non-metallic materials. The journal broadly defines ‘materials degradation’ as a reduction in the ability of a material to perform its task in-service as a result of environmental exposure. The journal covers a broad range of topics including but not limited to: -Degradation of metals, glasses, minerals, polymers, ceramics, cements and composites in natural and engineered environments, as a result of various stimuli -Computational and experimental studies of degradation mechanisms and kinetics -Characterization of degradation by traditional and emerging techniques -New approaches and technologies for enhancing resistance to degradation -Inspection and monitoring techniques for materials in-service, such as sensing technologies