铁基非晶涂层的制备及静态铅铋腐蚀行为研究

彭祥阳; 唐余海; 丁祥彬; 吕志超; 侯硕; 周建明; 韩书音; 吕昭平; 路广遥; 吴渊

doi:10.1007/s12613-022-2420-9

Volume 29 Issue 11

Nov. 2022

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文章导航 > 矿物冶金与材料学报（英文） > 2022 > 29(11): 2032-2040

Xiangyang Peng, Yuhai Tang, Xiangbin Ding, Zhichao Lu, Shuo Hou, Jianming Zhou, Shuyin Han, Zhaoping Lü, Guangyao Lu, and Yuan Wu, Fe-based amorphous coating prepared using high-velocity oxygen fuel and its corrosion behavior in static lead–bismuth eutectic alloy, Int. J. Miner. Metall. Mater., 29(2022), No. 11, pp. 2032-2040. https://doi.org/10.1007/s12613-022-2420-9

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Xiangyang Peng, Yuhai Tang, Xiangbin Ding, Zhichao Lu, Shuo Hou, Jianming Zhou, Shuyin Han, Zhaoping Lü, Guangyao Lu, and Yuan Wu, Fe-based amorphous coating prepared using high-velocity oxygen fuel and its corrosion behavior in static lead–bismuth eutectic alloy, Int. J. Miner. Metall. Mater., 29(2022), No. 11, pp. 2032-2040. https://doi.org/10.1007/s12613-022-2420-9

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研究论文

铁基非晶涂层的制备及静态铅铋腐蚀行为研究

1)
中广核研究院有限公司，深圳 518000，中国
2)
北京科技大学新金属材料国家重点实验室，北京 100083，中国

* 共同第一作者

通讯作者:
路广遥 E-mail: Luguangyao@cgnpc.com.cn

吴渊 E-mail: wuyuan@ustb.edu.cn

文章亮点

（1）采用超音速火焰喷涂技术在T91基体表面制备了性能良好的Fe_49.7Cr₁₈Mn_1.9Mo_7.4W_1.6B_15.2C_3.8Si_2.4铁基非晶涂层。

（2）对比了铁基非晶涂层和T91钢静态铅铋腐蚀行为的差异。

（3）提出了非晶涂层在静态铅铋环境中的腐蚀机制模型。

中文摘要

铅铋共晶合金（LBE）由于具有低熔点、高沸点、热导率高、化学惰性好和中子辐照损伤小等一系列的优异性能，被选为ADS系统散裂靶兼冷却剂的重点材料。然而传统结构材料在高温液态LBE环境中存在严重的腐蚀问题，提升结构材料与LBE的相容性，降低结构材料的腐蚀速率仍然是核工程应用过程中亟需解决的问题。在本研究中，我们采用超音速火焰喷涂技术（HOVF）在T91钢基体表面制备了Fe_49.7Cr₁₈Mn_1.9Mo_7.4W_1.6B_15.2C_3.8Si₂非晶涂层，对比研究了T91钢及非晶涂层在400℃、饱和氧条件下的静态铅铋腐蚀行为。结果表明，在经过500 h的铅铋腐蚀后，T91基板腐蚀严重，与LBE接触的界面上生成了6–10 μm厚均匀分布的双氧化层，其中内层主要成分是(Fe,Cr)₃O₄，外层成分是Fe₃O₄。相同条件下，非晶涂层展现出良好的热稳定性和耐铅铋腐蚀性能。涂层在铅铋腐蚀后，虽然表面有少量Fe₃O₄、Cr₂O₃和PbO生成，但并未观察到明显的LBE渗透现象，涂层的非晶含量和与基体的结合特性也基本保持不变。本研究表明，非晶涂层在铅铋环境下具有优异的抗腐蚀性能，未来作为铅铋环境下结构材料的保护涂层具有良好应用前景。

关键词:

Research Article

Fe-based amorphous coating prepared using high-velocity oxygen fuel and its corrosion behavior in static lead–bismuth eutectic alloy

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Abstract

Abstract

The Fe_49.7Cr₁₈Mn_1.9Mo_7.4W_1.6B_15.2C_3.8Si₂ amorphous coating was deposited on T91 steel substrate by using the high-velocity oxygen fuel (HVOF) spray technique to enhance the corrosion resistance of T91 stainless steel in liquid lead–bismuth eutectic (LBE). The corrosion behavior of the T91 steel and coating exposed to oxygen-saturated LBE at 400°C for 500 h was investigated. Results showed that the T91 substrate was severely corroded and covered by a homogeneously distributed dual-layer oxide on the interface contacted to LBE, consisting of an outer magnetite layer and an inner Fe–Cr spinel layer. Meanwhile, the amorphous coating with a high glass transition temperature (T_g = 550°C) and crystallization temperature (T_x = 600°C) exhibited dramatically enhanced thermal stability and corrosion resistance. No visible LBE penetration was observed, although small amounts of Fe₃O₄, Cr₂O₃, and PbO were found on the coating surface. In addition, the amorphicity and interface bonding of the coating layer remained unchanged after the LBE corrosion. The Fe-based amorphous coating can act as a stable barrier layer in liquid LBE and have great application potential for long-term service in LBE-cooled fast reactors.
- Fe-based amorphous coating;
- high-velocity oxygen fuel;
- corrosion behavior;
- lead–bismuth eutectic

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