Galvanic corrosion of pure metals in molten fluorides
Galvanic corrosion of pure metals in molten fluorides
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纯金属在熔融氟化物中的电偶腐蚀
DOI：
10.1016/j.jfluchem.2014.05.010
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发表时间：
2014-09
影响因子：
1.9
通讯作者：
Zeng, Chaoliu
中科院分区：
文献类型：
--
作者：
Wang, Yanli;Liu, Huijun;Zeng, Chaoliu
结构材料的腐蚀是使用熔融氟化物作为燃料或冷却剂的熔盐反应堆发展的一个巨大挑战。材料在熔融氟化物中的腐蚀主要是通过合金元素溶解到熔体中来发生的。在本研究中，研究了纯Ni， Fe和Cr作为常见合金成分在700°C的共晶LiF-NaF-KF熔体中的电偶腐蚀行为。实验结果表明，三种金属的腐蚀电位依次为Ni、Fe、Cr，其中Ni和Cr的电位差最大，它们之间的电位差很大，导致了明显的电偶腐蚀。Ni/Cr、Ni/Fe和Fe/Cr合金的电偶腐蚀效应均显著大于1，其中Ni/Cr合金的电偶腐蚀效果最显著，其次是Fe/Cr和Ni/Fe合金。
The corrosion of structural materials is a great challenge for the development of a molten salt reactor using molten fluorides as fuel or coolant. The corrosion of materials in molten fluorides occurs mainly through the dissolution of alloying elements into the melt. In the present investigation, the galvanic corrosion behavior of pure Ni, Fe, and Cr as the common alloying constituents in an eutectic LiF–NaF–KF melt at 700 °C has been investigated. The experimental results indicate that the corrosion potential of the three metals decreases significantly by the order of Ni, Fe and Cr, with the largest potential difference observed between Ni and Cr. Their great potential differences lead to the occurrence of significant galvanic corrosion. The galvanic corrosion effects of the couples Ni/Cr, Ni/Fe and Fe/Cr are significantly larger than 1, with the most remarkable effectiveness obtained for the couple Ni/Cr, then Fe/Cr and Ni/Fe.
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影响因子：
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通讯作者：
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