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Hot corrosion behavior of two powder metallurgy superalloys
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Wenhui YANG1, 2, 3, Delin LIU1, 2, 3, Gaofeng TIAN4, Rende MU1, 2, 3
Journal of Materials Engineering | 2026, 54(7) : 212 - 221
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Journal of Materials Engineering | 2026, 54(7): 212-221
• RESEARCH ARTICLE •
Hot corrosion behavior of two powder metallurgy superalloys
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Wenhui YANG1, 2, 3, Delin LIU1, 2, 3, Gaofeng TIAN4, Rende MU1, 2, 3
Affiliations
  • 1.Surface Engineering Institution，AECC Beijing Institute of Aeronautical Materials，Beijing 100095，China
  • 2.AECC Key Laboratory of Advanced Corrosion and Protection on Aviation Material，AECC Beijing Institute of Aeronautical Materials，Beijing 100095，China
  • 3.Fundamental Science Laboratory on Aerospace Protective Coatings，AECC Beijing Institute of Aeronautical Materials，Beijing 100095，China
  • 4.Science & Technology on Advanced High Temperature Structural Materials Laboratory，AECC Beijing Institute of Aeronautical Materials，Beijing 100095，China
Published: 2026-07-20 doi: 10.11868/j.issn.1001-4381.2025.000013
Outline
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To clarify the effect of composition optimization on the hot corrosion behavior of powder metallurgy superalloys， a new powder metallurgy superalloy （hereinafter referred to as the new alloy） and FGH96 superalloy are selected as research objects. Gas hot corrosion and salt-coated hot corrosion tests are carried out at 700， 750 ℃， and 800 ℃， and the hot corrosion behavior are analyzed by X-ray diffraction （XRD）， scanning electron microscopy （SEM）， and electron probe micro analysis （EPMA）. The results show that the gas hot corrosion mechanism for both alloys is accelerated oxidation， while the salt-coated hot corrosion mechanism involves the synergistic effect of oxidation and sulfidation. Compared with the FGH96 alloy， the new alloy exhibits superior hot corrosion resistance， particularly at 800 ℃. This phenomenon is mainly attributed to the increasing contents of Co and Al element in the new alloy. The high Co and Al contents promote the rapid formation of continuous and dense Cr2O3 and Al2O3 scales on the alloy surface. Moreover， the high Co content suppresses the internal oxidation of Al and reduces the inward diffusion of sulfur through the third-element effect， resulting in a complete and continuous Al2O3 scale. This effectively protects the alloy substrate and reduces the oxidation and sulfidation rates of the alloy.

powder metallurgy superalloy  /  hot corrosion  /  oxidation  /  sulfidation
杨文慧, 刘德林, 田高峰, 牟仁德. 两种粉末冶金高温合金的热腐蚀行为. 材料工程, 2026 , 54 (7) : 212 -221 . DOI: 10.11868/j.issn.1001-4381.2025.000013
Wenhui YANG, Delin LIU, Gaofeng TIAN, Rende MU. Hot corrosion behavior of two powder metallurgy superalloys[J]. Journal of Materials Engineering, 2026 , 54 (7) : 212 -221 . DOI: 10.11868/j.issn.1001-4381.2025.000013
Appendix
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Year 2026 volume 54 Issue 7
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Article Info
doi: 10.11868/j.issn.1001-4381.2025.000013
  • Receive Date：2025-01-09
  • Online Date：2026-10-28
  • Published：2026-07-20
Article Data
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History
  • Received：2025-01-09
  • Accepted：2025-04-14
Funding
Affiliations
    1.Surface Engineering Institution，AECC Beijing Institute of Aeronautical Materials，Beijing 100095，China
    2.AECC Key Laboratory of Advanced Corrosion and Protection on Aviation Material，AECC Beijing Institute of Aeronautical Materials，Beijing 100095，China
    3.Fundamental Science Laboratory on Aerospace Protective Coatings，AECC Beijing Institute of Aeronautical Materials，Beijing 100095，China
    4.Science & Technology on Advanced High Temperature Structural Materials Laboratory，AECC Beijing Institute of Aeronautical Materials，Beijing 100095，China
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表12种不同金属材料的力学参数
科
Family		 属数
Number of
genus		 种数
Number of
species		 占总种数比例
Percentage of
total species (%)		 属
Genus		 种数
Number of
species		 占总种数比例
Percentage of total
species (%)
鹅膏菌科Amanitaceae 2 11 5.26 鹅膏菌属 Amanita 10 4.78
小菇科 Mycenaceae 2 12 5.74 丝盖伞属 Inocybe 5 2.39
多孔菌科 Polyporaceae 8 14 6.70 蜡蘑属 Laccaria 5 2.39
红菇科 Russulaceae 3 23 11.00 小皮伞属 Marasmius 6 2.87
小菇属 Mycena 11 5.26
光柄菇属 Pluteus 5 2.39
红菇属 Russula 17 8.13
栓菌属 Trametes 5 2.39
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