Abstract Early oxidation characteristics of ferritic-martensitic steel T91 in supercritical water (SCW) from 1 h to 120 h were investigated. Relative to austenitic steels, occurrence of each oxidation stage for T91 was delayed. Both inner Cr-rich layer and outer magnetite layer formed even after a 1h-exposure at 540 °C, implying their almost simultaneous formations. Several assembled-pore lines were observed in the inner layer. Abundant pores accumulated at the boundary between the inner/outer oxide layers in steam, while mainly along the inner/diffusion layer interface in SCW, due to lower difference between iron diffusion through the inner and outer layers for the later.

中文翻译：

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超临界水中铁素体-马氏体钢氧化皮早期形成和演化的研究

摘要 研究了铁素体-马氏体钢 T91 在超临界水 (SCW) 中 1 h 至 120 h 的早期氧化特性。相对于奥氏体钢，T91 的每个氧化阶段的发生都被延迟了。即使在 540°C 下暴露 1 小时后，内部富铬层和外部磁铁矿层也会形成，这意味着它们几乎同时形成。在内层观察到几条组装孔线。在蒸汽中，由于铁通过内外层扩散之间的差异较小，蒸汽中的内/外氧化层之间的边界处聚集了大量孔隙，而在SCW中主要沿着内/扩散层界面。