Corrosion of ferritic-martensitic steels in steam and supercritical water
Corrosion of ferritic-martensitic steels in steam and supercritical water
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DOI：
10.1016/j.jnucmat.2012.09.037
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发表时间：
2013-10-01
影响因子：
3.1
通讯作者：
Allen, Todd R.
中科院分区：
文献类型：
--
作者：
Bischoff, Jeremy;Motta, Arthur T.;Allen, Todd R.
对两种铁素体 - 马氏体合金（HCM12A和NF616）在500℃的蒸汽和超临界水中进行了腐蚀试验。这两种合金在两种环境中的腐蚀动力学相似，呈现接近立方的行为，但在超临界水中的腐蚀速率明显高于在蒸汽中的腐蚀速率。利用扫描电子显微镜、微束同步辐射衍射和荧光对氧化层进行检测表明，两种合金在任何一种环境中都形成双层氧化结构。外层仅含Fe₃O₄，而内层含有Fe₃O₄和FeCr₂O₄的混合物。此外，利用一种新型光刻沉积工艺进行的标记实验表明，原始的水 - 金属界面与预期的外层 - 内层界面相符。根据已知的腐蚀机制对结果进行了讨论。（C）2012爱思唯尔有限公司。保留所有权利。
Corrosion tests were performed in steam and supercritical water at 500 degrees C for two ferritic-martensitic alloys: HCM12A and NF616. The corrosion kinetics for the two alloys are similar in both environments showing near cubic behavior, but the corrosion rate was significantly higher in supercritical water than in steam. Examinations of the oxide layers using scanning electron microscopy and microbeam synchrotron diffraction and fluorescence show that both alloys form two-layer oxide structures in either environment. The outer layer contains only Fe3O4, while the inner layer contains a mixture of Fe3O4 and FeCr2O4. Additionally, marker experiments using a novel photolithographic deposition process show that the original water-metal interface corresponds with the outer-inner layer interface as expected. The results are discussed in light of known corrosion mechanisms. (C) 2012 Elsevier B.V. All rights reserved.