Study on anti-coking and corrosion-resistant of nano-high-entropy ceramic coating on an ultra supercritical 1 000 MW unit boiler

MA Jun; ZHANG Guoshan; GAO Xianghu; GE Changhu; YAO Xiaojun; LI Ming; LU Zhongwei; ZHAO Shijie; LIU Baohua; DONG Meng; JI Haimin

doi:10.19666/j.rlfd.202401003

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Study on anti-coking and corrosion-resistant of nano-high-entropy ceramic coating on an ultra supercritical 1 000 MW unit boiler

更新时间：2025-09-28

- Study on anti-coking and corrosion-resistant of nano-high-entropy ceramic coating on an ultra supercritical 1 000 MW unit boiler
- Thermal Power Generation Vol. 53, Issue 5, Pages: 28-36(2024)
- 作者机构：
  
  1. 甘肃电投常乐发电有限责任公司
  2. 中国科学院兰州化学物理研究所
  3. 东方电气集团东方锅炉股份有限公司
  4. 西安热工研究院有限公司
- 作者简介：
- 基金信息：
- DOI：10.19666/j.rlfd.202401003
  CLC： TM621.2
- Published：2024
- 稿件说明：
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MA Jun, ZHANG Guoshan, GAO Xianghu, et al. Study on anti-coking and corrosion-resistant of nano-high-entropy ceramic coating on an ultra supercritical 1 000 MW unit boiler[J]. Thermal power generation, 2024, 53(5): 28-36.
DOI：

MA Jun, ZHANG Guoshan, GAO Xianghu, et al. Study on anti-coking and corrosion-resistant of nano-high-entropy ceramic coating on an ultra supercritical 1 000 MW unit boiler[J]. Thermal power generation, 2024, 53(5): 28-36. DOI： 10.19666/j.rlfd.202401003.

摘要

针对某台超超临界1 000 MW机组燃用准东煤锅炉水冷壁出现的沾污结渣、高温腐蚀问题，基于锅炉的燃烧煤种特性、结焦状况以及腐蚀类型，开展了纳米高熵陶瓷涂层在锅炉后墙水冷壁燃尽风区域的工程验证试验。采用宏观检查、扫描电子显微镜（scanning electron microscope

SEM）、X射线衍射（X-ray diffraction

XRD）、拉曼光谱、摩擦系数及表面能测试等方法，分析了纳米高熵陶瓷涂层的使用效果，揭示了纳米高熵陶瓷涂层的防沾污结渣、耐腐蚀机制。试验结果表明，涂层在锅炉运行11个月后完好，表面无明显结焦物、无明显腐蚀凹坑，管壁未发生明显减薄。纳米高熵陶瓷涂层能够较好地解决锅炉水冷壁沾污结渣以及高温腐蚀的问题，为燃用准东煤锅炉的安全运行提供保障。

Abstract

To solve the problems of fouling

slagging

and high-temperature corrosion in an ultra supercritical 1 000 MW unit boiler fueled by Zhundong coal

engineering verification test of nano-high-entropy ceramic coating in separated over fire air(SOFA) area of the boiler rear water wall was carried out

based on the coal characteristics

slagging condition and corrosion type of the boiler. Several methods such as macrographic check

scanning electron microscope(SEM)

X-ray diffraction(XRD)

Raman spectrum

friction coefficient and surface energy test were applied to observe the change of nano-high-entropy ceramic coating before and after experiments

thus to reveal the possible slag resistance and corrosion resistance mechanisms of nano-high-entropy ceramic coating. The results show that

the coating remained intact after 11 months' boiler operation

with no obvious slagging and corrosion pits on the surface and no significantly thinning of the pipe wall. Nano-high-entropy ceramic coating can better solve the problems of fouling

slagging and high-temperature corrosion on the boiler water wall

which provides a guarantee for safe operation of the boiler fueled by Zhundong coal.

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