Corrosion studies of SS 316H and Alloy 617 in thermally purified molten NaF-KF-UF4-UF3 salts

IF 1.6 4区材料科学 Q4 MATERIALS SCIENCE, MULTIDISCIPLINARY

Materials and Corrosion-werkstoffe Und Korrosion Pub Date : 2024-06-27 DOI:10.1002/maco.202414299

Qiufeng Yang, Amanda Leong, Jinsuo Zhang

引用次数: 0

Abstract

The study investigates salt chemistry and corrosion behavior of SS 316H and Alloy 617 in thermally purified molten NaF-KF-UF₄-UF₃ salts (UF₄/UF₃ initial ratio 12–14) at 800°C for 120, 72, and 32 h. UF₄/UF₃ ratio increases after corrosion tests. Cr species concentration in salts keeps increasing. Fe, Co, Ni, and Mo species increase first, then decrease. Cr/Mn oxides are formed along grain boundaries in SS 316H. Cr near the surface of Alloy 617 is completely depleted. A thin layer composed of Fe, Co, Ni, and Mo is observed on the Alloy 617 surface in 72-h and 32-h tests.

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SS 316H 和合金 617 在热纯化熔融 NaF-KF-UF4-UF3 盐中的腐蚀研究

本研究调查了 SS 316H 和合金 617 在 800°C、120、72 和 32 小时的热纯化熔融 NaF-KF-UF4-UF3 盐（UF4/UF3 初始比为 12-14）中的盐化学性质和腐蚀行为。盐中的铬物种浓度不断增加。铁、钴、镍和钼物种先增加后减少。在 SS 316H 中，铬/锰氧化物沿晶界形成。合金 617 表面附近的铬已完全耗尽。在 72 小时和 32 小时试验中，在合金 617 表面观察到由铁、钴、镍和钼组成的薄层。

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

Materials and Corrosion-werkstoffe Und Korrosion 工程技术-材料科学：综合

CiteScore

3.70

自引率

11.10%

发文量

199

审稿时长

1.4 months

期刊介绍： Materials and Corrosion is the leading European journal in its field, providing rapid and comprehensive coverage of the subject and specifically highlighting the increasing importance of corrosion research and prevention. Several sections exclusive to Materials and Corrosion bring you closer to the current events in the field of corrosion research and add to the impact this journal can make on your work.