周春根, 黄震中, 朱日彰. Fe25Cr20Ni2.4Si合金在H2S-H2中的高温硫化行为[J]. 工程科学学报, 1990, 12(2): 137-141. DOI: 10.13374/j.issn1001-053x.1990.02.026
引用本文: 周春根, 黄震中, 朱日彰. Fe25Cr20Ni2.4Si合金在H2S-H2中的高温硫化行为[J]. 工程科学学报, 1990, 12(2): 137-141. DOI: 10.13374/j.issn1001-053x.1990.02.026
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Zhou Chungen, Huang Zhenzhong, Zhu Rizhang. Sulfidation Kinetics of Fe25Cr20Ni2.4Si in H2S-H2 Atmosphere[J]. Chinese Journal of Engineering, 1990, 12(2): 137-141. DOI: 10.13374/j.issn1001-053x.1990.02.026
Citation: Zhou Chungen, Huang Zhenzhong, Zhu Rizhang. Sulfidation Kinetics of Fe25Cr20Ni2.4Si in H2S-H2 Atmosphere[J]. Chinese Journal of Engineering, 1990, 12(2): 137-141. DOI: 10.13374/j.issn1001-053x.1990.02.026
shu

Fe25Cr20Ni2.4Si合金在H2S-H2中的高温硫化行为

Sulfidation Kinetics of Fe25Cr20Ni2.4Si in H2S-H2 Atmosphere

    摘要
  • 摘要: 本文使用连续称重装置和非连续称重装置对Fe25Cr20Ni2.4Si合金在H2S-H2气氛中的高温硫化行为进行了研究。结果表明:这种合金的硫化动力学行为遵循抛物线规律。腐蚀产物有三层:最外层(称OL-Ⅱ层)由Fe-Ni-S系统组成;中间层(称OL-I层)由Fe-Cr-S系统组成;内硫化层(Subscale)由一些弥散的硫化物相组成。标记实验的结果表明:合金在硫化过程中,腐蚀产物的最外两层的生长是由金属离子向外扩散控制,而内硫化层的生长是由分解机理控制。

     

    Abstract: The sulfidation kinetics of Fe25Cr20Ni2.4Si were carried out at H2S-H2 atmospheres by means of continuously-weighing device and non-conti-nuously weighing device. Sulfidation kinetics curves of the alloy obeys parabolic law. The composition and morphology of sulfide scales were also studied. All sulfide scales consist of two surface layers in addition to subscale. Two surface layers are controlled by predominante diffusion of metals. The subscale grow is controlled by the inward diffusion of sulfur.

     

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