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Corrosion behavior of Hastelloy C-276 in supercritical water

机译:哈氏合金C-276在超临界水中的腐蚀行为

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摘要

The corrosion behavior of a nickel-based alloy Hastelloy C-276 exposed in supercritical water at 500-600 ℃/25 MPa was investigated by means of gravimetry, scanning electron microscopy/energy dispersive X-ray spectroscopy, X-ray diffraction and X-ray photoelectron spectroscopy. An oxide scale with dual-layer structure, mainly consisting of an outer NiO layer and an inner Cr_2O_3/NiCr_2O_4-mixed layer, developed on C-276 after 1000 h exposure. Higher temperature promoted oxidation, resulting in thicker oxide scale, larger weight gain and stronger tendency of oxide spallation. The oxide growth mechanism in SCW seems to be similar to that in high temperature water vapor, namely solid-state growth mechanism.
机译:通过重量分析,扫描电子显微镜/能量色散X射线能谱,X射线衍射和X-射线法研究了镍基合金Hastelloy C-276在500-600℃/ 25 MPa超临界水中的腐蚀行为。射线光电子能谱。暴露1000 h后在C-276上显影的双层氧化皮,主要由外NiO层和内Cr_2O_3 / NiCr_2O_4混合层组成。较高的温度促进氧化,导致氧化皮更厚,重量增加更大和氧化物剥落的趋势更强。 SCW中的氧化物生长机理似乎与高温水蒸气中的相似,即固态生长机理。

著录项

  • 来源
    《Corrosion science》 |2009年第9期|2092-2097|共6页
  • 作者单位

    National Key Laboratory for Nuclear Fuel and Materials, Nuclear Power Institute of China, P.O. Box 436, Chendu 610041, China;

    National Key Laboratory for Nuclear Fuel and Materials, Nuclear Power Institute of China, P.O. Box 436, Chendu 610041, China;

    National Key Laboratory for Nuclear Fuel and Materials, Nuclear Power Institute of China, P.O. Box 436, Chendu 610041, China;

    National Key Laboratory for Nuclear Fuel and Materials, Nuclear Power Institute of China, P.O. Box 436, Chendu 610041, China;

    College of Nuclear Science and Technology, Shanghai Jiaotong University, Shanghai 200240, China;

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  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    A. nickel-based alloy; C. supercritical water; C. corrosion; oxide scale;

    机译:A.镍基合金;C.超临界水;C.腐蚀;氧化皮;

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