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期刊信息
  • 主管单位:
  • 上海市教育委员会
  • 主办单位:
  • 上海理工大学、上海市能源研究会、上海电气(集团)总公司
  • 主  编:
  • 陈康民
  • 地  址:
  • 上海市军工路516号
  • 邮政编码:
  • 200093
  • 联系电话:
  • 021-55272843
  • 电子邮件:
  • eribjb@usst.edu.cn
  • 国际标准刊号:
  • 1008-8857
  • 国内统一刊号:
  • 31-1410/TK
  • 邮发代号:
  • 单    价:
  • 5.00
  • 定    价:
  • 20.00
奥氏体钢SP2215和马氏体钢X19CrMoNbVN11−1在高温高压超临界CO2环境下的腐蚀行为研究
Study on corrosion behavior of austenitic steel SP2215 and martensitic steel X19CrMoNbVN11-1 in supercritical CO2 environment
投稿时间:2022-12-31  
DOI:10.13259/j.cnki.eri.2023.04.004
中文关键词:  超临界CO2  奥氏体钢  马氏体钢  应力  腐蚀
英文关键词:supercritical CO2  austenitic steel  martensitic steel  stress  corrosion
基金项目:上海市地方院校能力建设计划项目(20060502000)
作者单位E-mail
林卓越 上海理工大学 能源与动力工程学院上海 200093  
杨其国 上海理工大学 能源与动力工程学院上海 200093 yangqg@usst.edu.cn 
杨英英 上海理工大学 能源与动力工程学院上海 200093  
许梓源 上海理工大学 能源与动力工程学院上海 200093  
摘要点击次数: 101
全文下载次数: 99
中文摘要:
      超临界CO2布雷顿循环具有循环效率高、体积小等优点,实际应用中循环系统部件面临因焊接及叶片自身旋转等拉应力的存在而加重腐蚀的问题,因此探明部件材料腐蚀行为是其在工程领域中应用的前提条件之一。搭建了超临界CO2布雷顿循环实验台,模拟实际应用工况,并添加四点应力装置为样件施加载荷。研究了奥氏体钢SP2215和马氏体钢X19CrMoNbVN11−1(简称X19)在20 MPa/550 ℃的CO2环境中未加载和加载应力下的腐蚀行为(900 h)。利用X射线衍射、X射线光电子能谱、扫描电镜及X射线能谱对两种材料腐蚀产物的形貌和成分进行了分析,并对材料的腐蚀行为进行了对比,结果发现: SP2215样件的氧化物主要为Cr2O3 和Fe3O4,但应力加载样件表面Fe3O4信号更强烈。应力加载加剧了样件的腐蚀,增加了氧化膜厚度,使样件表面发生了严重的氧化层脱落。未加载的X19 表面出现了单质碳,生成的氧化物为Fe3O4与FeCr2O4,且可能存在分层现象。SP2215抗腐蚀能力优于X19,实验中并未出现明显的渗碳腐蚀现象。研究可为超临界CO2布雷顿循环工程应用选材提供参考。
英文摘要:
      Supercritical CO2 Brayton cycle has the advantages of high cycle efficiency and small size. In the practical application, the system components are challenged by enhanced corrosion due to the existence of tensile stress from welding and blade rotation. Therefore, it is critical to investigate the material corrosion behavior of components in the cycle system for its potential engineering application. A supercritical CO2 Brayton cycle test rig was set up to simulate the working conditions, and a four-point stress device was added to load stress on the samples. Influence of stress loading on the corrosion behavior of a new austenitic steel SP2215 and martensitic steel X19CrMoNbVN11-1 (X19) in the CO2 environment of 20 MPa/550 ℃ was examined for 900 h. X-ray diffraction (XRD), X-ray photoelectron Spectrometer (XPS), and scanning electron microscopy- energy-dispersive X-ray spectrometer (SEM-EDS) were used to characterize the morphology and composition of the corrosion products of these materials, and their corrosion behaviors were compared. Results show that the oxides in SP2215 sample mainly included Cr2O3 and Fe3O4, but stronger Fe3O4 signal on the surface of sample with stress loading was observed. The stress loading enhanced the sample corrosion, which increased the film thickness of oxides. Serious drop of oxides on the sample surface took place. Pure carbon on the surface of X19 was observed without stress loading, and the oxides such as Fe3O4 and FeCr2O4 were formed along with stratification phenomenon of outer Fe3O4 and inner FeCr2O4. The corrosion resistance of austenite SP2215 was better than that of martensite X19. No carburization corrosion was found in these experiments. This research can provide an engineering application reference for the material selection in supercritical CO2 Brayton cycle.
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