Corrosion of reduced activation ferritic martensitic steel JLF-1 in purified Flinak at static and flowing conditions
Corrosion of reduced activation ferritic martensitic steel JLF-1 in purified Flinak at static and flowing conditions
复制标题
DOI：
10.1016/j.fusengdes.2010.03.064
复制
发表时间：
2010-12
影响因子：
1.7
通讯作者：
M. Kondo;T. Nagasaka;V. Tsisar;A. Sagara;T. Muroga;Takashi Watanabe;T. Oshima;Yukihiro Yokoyama
中科院分区：
文献类型：
--
作者：
M. Kondo;T. Nagasaka;V. Tsisar;A. Sagara;T. Muroga;Takashi Watanabe;T. Oshima;Yukihiro Yokoyama
Flinak（LiF-KF-NaF）具有作为自冷聚变包层或包层系统二次传热流体的氚增殖剂候选者的潜力。Flinak的结构材料腐蚀是其问题之一。在600°C下使用纯化的和未纯化的Flinak对低活化铁素体马氏体（RAFM）钢JLF-1（Fe-9 Cr-2 W-0.1C）进行腐蚀测试。采用电精炼工艺对Flinak进行提纯，降低了Flinak中Ni和H2O的含量。试验在静态条件和由叶轮引起的流动条件下进行。在未纯化的Flinak中的测试结果表明，在晶粒、包、块和板条边界处的钢表面上存在局部腐蚀。JLF-1在纯化Flinak中的腐蚀远小于在未纯化Flinak中的腐蚀。在这些边界的腐蚀并不严重，但局部电路的点蚀被部分检测到。这是由于Flinak中或表面上的局部杂质冷凝。流动条件下的腐蚀损失较小，与静态条件下的腐蚀损失相同。流动条件下的表面点蚀数量少于静态条件下的点蚀数量。混合流和Flinak流消除了局部杂质冷凝，控制了点蚀的发生。
Flinak (LiF–KF–NaF) has the potential to be a tritium breeder candidate for a self-cooled fusion blanket or a secondary heat-transfer fluid of the blanket system. Corrosion of the structural material in Flinak is one of its issues. A corrosion test for Reduced Activation Ferritic Martensitic (RAFM) steel, JLF-1 (Fe–9Cr–2W–0.1C), was performed at 600°C using both purified and non-purified Flinak. The Flinak was purified by the electro-refining process, where Ni and H2O content in the Flinak were decreased. The test was performed at static conditions and flowing conditions induced by an impeller. The results of the test in non-purified Flinak showed local corrosion on the steel surface at the grain, packet, block and lath boundaries. The corrosion of JLF-1 in purified Flinak was much less than that in the non-purified Flinak. The corrosion in these boundaries was not severe, though pitting corrosion by the local electro-circuit was partly detected. This is due to local impurity condensation either in the Flinak or on the surface. The corrosion loss in flowing condition was small, the same as that in the static conditions. The number of pitting corrosions on the surface for flowing conditions was less than that in the static test. The occurrence of pitting corrosion was controlled by the mixture and Flinak flow, in which the local impurity condensation was removed.