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首页> 外文期刊>Journal of Materials Research >Hot corrosion behavior of thermal spray coatings on superalloy in coal-fired boiler environment
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Hot corrosion behavior of thermal spray coatings on superalloy in coal-fired boiler environment

机译：燃煤锅炉环境中高温合金上热喷涂层的热腐蚀行为

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摘要

Coal is an attractive fuel owing to its low price linked to its worldwide availability but combustion of coal generates very corrosive media especially near the superheater tubes. The present investigation is an attempt to evaluate the hot corrosion behavior of detonation-gun sprayed coatings of Cr_3C_2-NiCr, NiCrAlY + 0.4 wt% CeO_2, and NiCoCrAlYTa on superfer 800H, exposed to low temperature super-heater zone of the coal-fired boiler. The specimens were hanged in the platen super-heater of coal-fired boiler where the gas temperature was around 900 ℃ ± 10 ℃. Hot corrosion experiments were performed for 10 cycles, each cycle consisting of 100 h exposure followed by 1 h cooling at ambient temperature. All three coatings deposited on superfer 800H imparted better hot corrosion resistance than the bare uncoated one. The Cr_3C_2-NiCr coated superalloy performed better than the other two coatings in the given boiler environment.
机译：由于煤炭价格低廉，与全球范围内的煤炭供应紧密相关，因此煤炭是一种有吸引力的燃料，但煤炭燃烧会产生腐蚀性极强的介质，尤其是在过热器管附近。本研究旨在评估暴露于燃煤锅炉低温过热区的Superfer 800H上的Cr_3C_2-NiCr，NiCrAlY + 0.4 wt％CeO_2和NiCoCrAlYTa的起爆枪喷涂涂层的热腐蚀行为。将样品悬挂在燃气温度约900℃±10℃的燃煤锅炉的平板过热器中。热腐蚀实验进行了10个循环，每个循环包括暴露100小时，然后在环境温度下冷却1小时。 Superfer 800H上沉积的所有三种涂层均比裸露的未涂覆涂层具有更好的耐热腐蚀性。在给定的锅炉环境中，Cr_3C_2-NiCr涂层高温合金的性能优于其他两种涂层。

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  • 来源
    《Journal of Materials Research》 |2015年第18期|2829-2843|共15页
  • 作者

    Subhash Kamal; Korada Viswanatha Sharma; Rengaswamy Jayaganthan; Satya Prakash;

  • 作者单位

    Department of Petroleum Engineering, Universiti Teknologi PETRONAS, Bander Seri Iskander, Tronoh 32610, Malaysia;

    Department of Mechanical Engineering, Universiti Teknologi PETRONAS, Bander Seri Iskander, Tronoh 32610, Malaysia;

    Department of Metallurgical and Materials Engineering, Indian Institute of Technology Roorkee, Roorkee, Uttarakhand 247667, India;

    Department of Metallurgical and Materials Engineering, Indian Institute of Technology Roorkee, Roorkee, Uttarakhand 247667, India;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);美国《生物学医学文摘》(MEDLINE);
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  • 正文语种 eng
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