Corrosion behavior of steels in flowing lead–bismuth
Corrosion behavior of steels in flowing lead–bismuth
复制标题
DOI：
10.1016/s0022-3115(01)00521-9
复制
发表时间：
2001-07
影响因子：
3.1
通讯作者：
F. Barbier;A. Rusanov
中科院分区：
文献类型：
--
作者：
F. Barbier;A. Rusanov
研究了钢在流动铅铋环境中的腐蚀。将样品在300°C和470°C下暴露于熔体中长达3116小时。流速接近2 m/s，Pb-Bi中的氧浓度保持在1-2×10 - 6wt%。与特定的钢（Optifer IV、T91和EP 823马氏体钢、1.4970奥氏体钢）无关，在任一温度下均未检测到溶解迹象。在所有情况下，在钢表面上形成保护性氧化层。在1.4970奥氏体钢的情况下，它非常薄（厚度约为1 μm），在Pb-Bi-O中呈现出最大的抗氧化性。在470°C下3116 h后，马氏体钢表面形成的氧化物层（磁铁矿氧化膜Fe 3 O 4）的厚度约为10 ~ 20 μm。3种马氏体钢的抗氧化性能依次为：EP 823、T91和Optifer IV。在EP 823俄罗斯钢中硅的存在（约2wt%）减少了氧化物层的生长。结果表明，铅铋合金中目前的氧含量水平至少在这段时间内适合于确保钢对液态金属腐蚀的稳定保护。
Corrosion of steels in a flowing Pb–Bi environment has been studied. Specimens were exposed to the melt at 300°C and 470°C for up to 3116 h. The flow velocity was close to 2 m/s and the oxygen concentration in Pb–Bi was maintained at 1–2×10−6wt % . Independent of the specific steels (Optifer IV, T91 and EP823 martensitic steels, 1.4970 austenitic steel), no sign of dissolution was detected for either temperatures. In all cases, a protective oxide layer was formed on the steel surface. It was very thin (thickness ≪1 μm ) in the case of the 1.4970 austenitic steel, which presented the maximum resistance to oxidation in Pb–Bi–O. After 3116 h at 470°C, the thickness of the oxide layer (magnetite scale Fe3O4) formed on the martensitic steels ranged from about 10 to 20 μm. The oxidation resistance of the three martensitic steels decreases in the sequence: EP823, T91 and Optifer IV. The presence of silicon in the EP823 Russian steel (≈2 wt %) reduces the oxide layer growth. Results show that the present level of oxygen content in Pb–Bi is suitable for ensuring stable protection of steels against liquid metal corrosion at least for that period.