中国物理B ›› 2016, Vol. 25 ›› Issue (12): 128103-128103.doi: 10.1088/1674-1056/25/12/128103

• INTERDISCIPLINARY PHYSICS AND RELATED AREAS OF SCIENCE AND TECHNOLOGY • 上一篇    下一篇

Hot corrosion behavior of the spray-formed nickel-based superalloy

Min Xia(夏敏), Tian-Fu Gu(谷天赋), Chong-Lin Jia(贾崇林), Chang-Chun Ge(葛昌纯)   

  1. 1. School of Materials Science and Engineering, University of Science and Technology Beijing, Beijing 100083, China;
    2. Science and Technology on Advanced High Temperature Structural Materials Laboratory, Beijing Institute of Aeronautical Materials, Beijing 100095, China
  • 收稿日期:2016-07-13 修回日期:2016-09-09 出版日期:2016-12-05 发布日期:2016-12-05
  • 通讯作者: Min Xia, Chang-Chun Ge E-mail:xmdsg@ustb.edu.cn;ccge@mater.ustb.edu.cn

Hot corrosion behavior of the spray-formed nickel-based superalloy

Min Xia(夏敏)1, Tian-Fu Gu(谷天赋)1, Chong-Lin Jia(贾崇林)1,2, Chang-Chun Ge(葛昌纯)1   

  1. 1. School of Materials Science and Engineering, University of Science and Technology Beijing, Beijing 100083, China;
    2. Science and Technology on Advanced High Temperature Structural Materials Laboratory, Beijing Institute of Aeronautical Materials, Beijing 100095, China
  • Received:2016-07-13 Revised:2016-09-09 Online:2016-12-05 Published:2016-12-05
  • Contact: Min Xia, Chang-Chun Ge E-mail:xmdsg@ustb.edu.cn;ccge@mater.ustb.edu.cn

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摘要：

An investigation of low temperature hot corrosion is carried out on a spray-formed nickel-based superalloy FGH100 pre-coated with Na2SO4-NaCl at 700℃ for 100 h. Mass gain measurement, x-ray diffraction, scanning electron microscopy, and energy dispersive x-ray spectroscopy are used to study the corrosion behavior. Results reveal that corrosion behavior follows a sequence, that is, first rapidly proceeding, then gradually slowing down, and finally forming an outer layer composed of different types of oxides and an inner layer mainly comprised of sulfides. In-depth analysis reveals that the hot corrosion of FGH100 is a combined effect of oxidation-sulfidation and transfer of oxides.

关键词: superalloy, molten salts, hot corrosion, oxidation

Abstract:

An investigation of low temperature hot corrosion is carried out on a spray-formed nickel-based superalloy FGH100 pre-coated with Na2SO4-NaCl at 700℃ for 100 h. Mass gain measurement, x-ray diffraction, scanning electron microscopy, and energy dispersive x-ray spectroscopy are used to study the corrosion behavior. Results reveal that corrosion behavior follows a sequence, that is, first rapidly proceeding, then gradually slowing down, and finally forming an outer layer composed of different types of oxides and an inner layer mainly comprised of sulfides. In-depth analysis reveals that the hot corrosion of FGH100 is a combined effect of oxidation-sulfidation and transfer of oxides.

Key words: superalloy, molten salts, hot corrosion, oxidation

中图分类号:  (Powder processing: powder metallurgy, compaction, sintering, mechanical alloying, and granulation)

  • 81.20.Ev
83.50.Uv (Material processing (extension, molding, etc.)) 62.20.-x (Mechanical properties of solids)