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首页> 外文期刊>International Journal of Nuclear Energy >Oxidation/Corrosion Behaviour of ODS Ferritic/Martensitic Steels in Pb Melt at Elevated Temperature
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Oxidation/Corrosion Behaviour of ODS Ferritic/Martensitic Steels in Pb Melt at Elevated Temperature

机译：ODS铁素体/马氏体钢在高温铅熔体中的氧化/腐蚀行为

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Lead-based melts (Pb, Pb-Bi) are considered as candidate coolants and spallation neutron targets due to their excellent thermophysical and nuclear properties. However, the corrosion of structural materials remains a major issue. Oxide dispersion strengthened (ODS) ferritic/martensitic steels are considered for high temperature application for both fission and fusion reactor concepts. The oxidation/corrosion kinetics in a static oxygen-saturated Pb melt at temperature of 550°C as well as the morphology and composition of scales formed on ferritic/martensitic Fe-9Cr-1.5W and ferritic Fe-14Cr-1.5W ODS steels have been investigated. Both materials showed homogeneous multiple, dense scales that consisted of typical combination of Fe3O4as outer sublayer and (Fe,Cr)3O4as inner sublayer. A nonuniform growth of inner oxide sublayers into the metal matrix as well as a good adhesion to the metal substrate is observed. With the prolongation of exposure from 240 to 1000 h, observed scales grow from 35 µm to 45 µm for ODS Fe-9Cr steel and from 40 µm to 60 µm for ODS Fe-14Cr steel with the thinning rates of 0,22 and 0,31 mm/year correspondingly. The mechanism of scales formation is discussed.
机译：铅基熔体（Pb，Pb-Bi）具有出色的热物理和核特性，因此被视为候选冷却剂和散裂中子靶。但是，结构材料的腐蚀仍然是主要问题。裂变和聚变反应堆概念均考虑将氧化物弥散强化（ODS）铁素体/马氏体钢用于高温应用。静态氧饱和Pb熔体在550°C的温度下的氧化/腐蚀动力学以及铁素体/马氏体Fe-9Cr-1.5W和Fe-14Cr-1.5W ODS钢上形成的氧化皮的形态和组成被调查。两种材料均显示出均匀的多重致密鳞片，其由Fe3O4作为外子层和（Fe，Cr）3O4作为内子层的典型组合组成。观察到内部氧化物亚层向金属基质中的不均匀生长以及对金属基底的良好粘附。随着暴露时间从240到1000 h的延长，ODS Fe-9Cr钢的观察到的鳞片从35 µm增加到45 µm，ODS Fe-14Cr钢的观察到的鳞片从40 µm增加到60 µm，减薄率分别为0.22和0， 31 mm /年。讨论了水垢形成的机理。

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