Corrosion experiments and materials developed for the Japanese HLM systems
Corrosion experiments and materials developed for the Japanese HLM systems
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DOI：
10.1016/j.jnucmat.2011.04.039
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发表时间：
2011-08
影响因子：
3.1
通讯作者：
Y. Kurata
中科院分区：
文献类型：
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作者：
Y. Kurata
在 450°C 至 600°C 的温度范围内进行铅铋共晶 (LBE) 静态腐蚀测试，以了解腐蚀行为并开发适用于重液态金属系统的耐腐蚀材料。虽然钢中 Cr 含量的增加增强了 LBE 中的耐腐蚀性，但当 Cr 含量高于 12wt% 时，效果接近恒定值。 LBE中的腐蚀深度随着温度的升高而增加，并且即使在高氧浓度的条件下，在550℃以上腐蚀也变得严重。在高氧浓度条件下，316SS和JPCA在550℃以上会发生镍溶解和Pb-Bi渗透。当氧浓度降低到铁氧化物形成水平以下时，由于各种元素的溶解和晶界腐蚀，对这些钢的腐蚀也会变得剧烈。虽然在T91中添加1.5wt％Si和在316SS中添加2.5wt％Si改善了耐腐蚀性，但考虑到LBE中氧浓度的波动，效果不够充分。此外，在 T91 中添加 1.5wt% Si 会导致 DBTT 上升。一种使用 Al、Ti 和 Fe 粉末的新涂层方法可在 316SS 上形成耐腐蚀涂层。含 6–8wt% Al 的涂层在含 10−6–10−4wt% 氧的 LBE 中在 550°C 3000h 下表现出良好的耐腐蚀性。
The static corrosion tests in lead–bismuth eutectic (LBE) were conducted from 450°C to 600°C to understand corrosion behavior and develop corrosion resistant materials for heavy liquid metal systems. While increase of Cr content in steels enhances corrosion resistance in LBE, the effect approaches a constant value above 12wt% of Cr. Corrosion depth in LBE increases with increasing temperature and corrosion attack becomes severe above 550°C even under the condition of high oxygen concentration. Nickel dissolution and Pb–Bi penetration occur in 316SS and JPCA above 550°C under the condition of high oxygen concentration. When oxygen concentration decreases below the level of Fe oxide formation, corrosion attack on these steels also becomes violent due to dissolution of various elements and grain boundary corrosion. Whereas additions of 1.5wt% Si to T91 and 2.5wt% Si to 316SS improve corrosion resistance, the effect is insufficient taking fluctuation of oxygen concentration in LBE into consideration. Furthermore, addition of 1.5wt% Si to T91 causes rise in DBTT. A new coating method using Al, Ti and Fe powders produces corrosion resistant coating layers on 316SS. The coating layers containing 6–8wt% Al exhibit good corrosion resistance at 550°C for 3000h in LBE containing 10−6–10−4wt% of oxygen.