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首页> 外文期刊>Journal of Alloys and Compounds: An Interdisciplinary Journal of Materials Science and Solid-state Chemistry and Physics >High-temperature corrosion of Fe-Ni-based alloy HR6W, Ni-based alloys Haynes 282 and Inconel 740 in supercritical water at 450 degrees C and 25 MPa
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High-temperature corrosion of Fe-Ni-based alloy HR6W, Ni-based alloys Haynes 282 and Inconel 740 in supercritical water at 450 degrees C and 25 MPa

机译：Fe-Ni基合金HR6W，Ni基合金Haynes 282的高温腐蚀，450℃和25MPa的超临界水中的镍铬合金Haynes 282和Inconel 740

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In this work, Fe-Ni-based alloy HR6W, Ni-based alloys Haynes 282 and Inconel 740 were investigated in supercritical water at 450 degrees C and 25 MPa for 30-200 h. HR6W, Haynes 282 and Inconel 740 all showed corrosion weight gain in the whole exposure duration and the oxidation kinetics follow the parabolic law. HR6W and Inconel 740 samples displayed lower corrosion weight gain and better corrosion resistance under experimental conditions. A layer composed of network-shaped oxides was formed on the surface of Inconel 740 sample. The height of the oxide particles on Haynes 282 sample surface is not consistent enough after exposure in supercritical water for 200 h, and there was large amount of vacancies among oxide clusters, which increases the risk of substrate destruction. The dominant phases on the surface of HR6W, Haynes 282 and Inconel 740 samples were [FeCr2O4, NiFe2O4], [Fe3O4, NiFe2O4 and Cr2O3], and [Fe2O3, Fe3O4], respectively. (C) 2021 Elsevier B.V. All rights reserved.
机译：在这项工作中，铁镍基合金HR6W、镍基合金Haynes 282和Inconel 740在450℃和25 MPa的超临界水中进行了30-200小时的研究。HR6W、Haynes 282和Inconel 740在整个暴露时间内均显示腐蚀重量增加，氧化动力学遵循抛物线规律。在实验条件下，HR6W和Inconel 740试样的腐蚀增重较低，耐腐蚀性较好。Inconel 740试样表面形成了一层网状氧化物。在超临界水中暴露200小时后，Haynes 282样品表面上的氧化物颗粒高度不够一致，并且氧化物团簇之间存在大量空位，这增加了基底破坏的风险。HR6W、Haynes 282和Inconel 740样品表面的主要相分别为[FeCr2O4、NiFe2O4]、[Fe3O4、NiFe2O4和Cr2O3]和[Fe2O3、Fe3O4]。（c）2021爱思唯尔B.V.保留所有权利。

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