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首页> 外文期刊>Journal of Materials Engineering and Performance >Simulated Fireside Corrosion Behavior of a Wrought Ni-Fe-Based Superalloy for 700 degrees C-Class Ultra-supercritical Power Plant Applications
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Simulated Fireside Corrosion Behavior of a Wrought Ni-Fe-Based Superalloy for 700 degrees C-Class Ultra-supercritical Power Plant Applications

机译：用于700摄氏度超超临界发电厂应用的锻镍基超合金的模拟壁式腐蚀行为

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摘要

Laboratory corrosion tests were performed to assess the corrosion behavior of a newly wrought Ni-Fe-based superalloy for a 700 degrees C-class ultra-supercritical power plant application. The new alloy was investigated in a simulated coal ash/gas atmosphere at 700 and 750 degrees C (with and without NaCl addition) for exposure times up to 500 h, using scanning electron microscopy with energy-dispersive x-ray spectroscopy as well as x-ray diffraction. The results indicated that the new alloy exhibited an anti-corrosion behavior comparable to the currently used Ni-Fe-based alloys for A-USC plant applications. Layered corrosion products consisting of a Cr2O3 outer layer and thread-like internal oxides were observed at both 700 and 750 degrees C. The elevation of the temperature accelerated the growth of corrosion scale, which was characterized by the formation of thicker corrosion scales and more internal oxides and sulfides. The addition of NaCl led to significant scale spallation, where volatile metal chlorides may be responsible for these spallations and for more severe internal oxidation and sulfuration.
机译：进行实验室腐蚀试验，以评估新锻炼的Ni-Fe高超合金的腐蚀行为，用于700摄氏度超超临界发电厂应用。在700和750摄氏度的模拟煤灰/气体气氛中研究了新的合金，用于使用扫描电子显微镜与能量分散X射线光谱以及X的扫描电子显微镜以及X的暴露时间为高达500小时的曝光时间。 - 射线衍射。结果表明，新合金表明，与目前使用的A-USC植物应用相当的抗腐蚀行为。在700和750℃下观察到由CR2O3外层和螺纹内氧化物组成的层状腐蚀产物。温度的升高加速了腐蚀量的生长，其特征在于形成较厚的腐蚀尺度和更多内部氧化物和硫化物。添加NaCl导致显着的介质，其中挥发性金属氯化物可能对这些椎间体负载和更严重的内部氧化和硫。

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  • 作者

    Lu Jintao; Huang Jinyang; Yang Zhen; Zhou Yongli; Dang Yingying; Yuan Yong; Gu Yuefeng;

  • 作者单位

    Xian Thermal Power Res Inst Co Ltd Natl Engn Res Ctr Clean Coal Combust Util Boilers Xingqing Rd 136 Xian 710032 Shaanxi Peoples R China;

    Xian Thermal Power Res Inst Co Ltd Natl Engn Res Ctr Clean Coal Combust Util Boilers Xingqing Rd 136 Xian 710032 Shaanxi Peoples R China;

    Xian Thermal Power Res Inst Co Ltd Natl Engn Res Ctr Clean Coal Combust Util Boilers Xingqing Rd 136 Xian 710032 Shaanxi Peoples R China;

    Xi An Jiao Tong Univ Sch Energy &

    Power Engn Xian 710049 Peoples R China;

    Xian Thermal Power Res Inst Co Ltd Natl Engn Res Ctr Clean Coal Combust Util Boilers Xingqing Rd 136 Xian 710032 Shaanxi Peoples R China;

    Xian Thermal Power Res Inst Co Ltd Natl Engn Res Ctr Clean Coal Combust Util Boilers Xingqing Rd 136 Xian 710032 Shaanxi Peoples R China;

    Xian Thermal Power Res Inst Co Ltd Natl Engn Res Ctr Clean Coal Combust Util Boilers Xingqing Rd 136 Xian 710032 Shaanxi Peoples R China;

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  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 金属学与金属工艺;工程材料学;
  • 关键词

    corrosion; high-temperature; sulfuration; superalloy; ultra-supercritical;

    机译：腐蚀;高温;硫化;超合金;超超临界;

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