HOT CORROSION BEHAVIOR OF K38G ALLOY AND ITS SPUTTERED NANOCRYSTALLINE COATING BY PRE-DEPOSITED SULFATE AT 900℃

Acta Metallurgica Sinica (English Letters) ›› 2002, Vol. 15 ›› Issue (1): 119-122 .

• Research Articles • Previous Articles Next Articles

HOT CORROSION BEHAVIOR OF K38G ALLOY AND ITS SPUTTERED NANOCRYSTALLINE COATING BY PRE-DEPOSITED SULFATE AT 900℃

S.J.Geng, Fuhui Wang, S.L.Zhu

State Key Laboratory for Corrosion and Protection, Institute of Metal Research, The Chinese Academy of Sciences, Shenyang 110016, China

Received:2001-07-31 Revised:2001-09-24 Online:2002-02-15 Published:2009-10-10
Contact: S.J.Geng

Abstract

Abstract: The sputtered nanocrystalline coating of K38G alloy was obtained by magnetron sput-tering. The hot corrosion behaviors of cast K38G alloy and its sputtered nanocrys-talline coating by pre-deposited 75wt%Na2SO4+25wt%K2SO4 at 900℃ were studied.The results indicated the occurrence of internal sulfidation in the cast K38G alloy withpre-deposited sulfattes of 0.8 and 3.0mg/cm2. However, the internal sulfidation wasnot observed in the coating with pre-deposited 0. 8mg/cm2 sulfate. The hot corrosionresistance of K38G alloy was clearly enhanced through nanocrystallinzation, althoughthe internal sulfides were still formed for the coating with sulfate deposit of 3mg/cm2.The relevant hot corrosion mechanism was also discussed.

Key words: K38G, sputtered nanocrystalline coating, hot corrosion

S.J.Geng, Fuhui Wang, S.L.Zhu. HOT CORROSION BEHAVIOR OF K38G ALLOY AND ITS SPUTTERED NANOCRYSTALLINE COATING BY PRE-DEPOSITED SULFATE AT 900℃[J]. Acta Metallurgica Sinica (English Letters), 2002, 15(1): 119-122 .

[1]	W.L. Zhang, W. Li, L.B. Fu, X. Peng, J. Sun, S.M. Jiang, J. Gong, C. Sun. Hot Corrosion Behavior of Hf-Doped NiAl Coating in the Mixed Salt of Na₂SO₄ + K₂SO₄ at 900 °C [J]. Acta Metallurgica Sinica (English Letters), 2023, 36(9): 1409-1420.
[2]	Hao-Jie Yan, Jun-Jie Xia, Lian-Kui Wu, Fa-He Cao. Hot Corrosion Behavior of Ti45Al8.5Nb Alloy: Effect of Anodization and Pre-oxidation [J]. Acta Metallurgica Sinica (English Letters), 2022, 35(9): 1531-1546.
[3]	Mingming Zhang, Yipeng Feng, Yahui Wang, Yunsong Niu, Li Xin, Yongfeng Li, Jianxiu Su, Shenglong Zhu, Fuhui Wang. Corrosion Behaviors of Nitride Coatings on Titanium Alloy in NaCl-Induced Hot Corrosion [J]. Acta Metallurgica Sinica (English Letters), 2021, 34(10): 1434-1446.
[4]	Duoli Wu, Sumeng Jiang, Qixiang Fan, Jun Gong, Chao Sun. Hot Corrosion Behavior of a Cr-Modified Aluminide Coating on a Ni-Based Superalloy [J]. Acta Metallurgica Sinica (English Letters), 2014, 27(4): 627-634.
[5]	S.N .Ma, Q.Liu and C.Q. Li Surface Engineering Research Institute of CMES, Beijing 100072, China. STUDY OF HOT CORROSION RESISTANCE MECHANISMS OF ARC SPRAYING COATINGS [J]. Acta Metallurgica Sinica (English Letters), 1999, 12(5): 1007-1013.
[6]	WANG Fuhui;LOU Hanyi;WU Weitao Corrosion Science Laboratory,Institute of Corrosion and Protection of Metals,Academia Sinica,Shenyang,China research assistant,Institute of Corrosion and Protection of Metats,Academia Sinica,Shenyang 110015,China. INFLUENCE OF DEFECTS ON PROPERTIES OF SPUTTERED CoCrAIY COATINGS [J]. Acta Metallurgica Sinica (English Letters), 1993, 6(8): 141-146.
[7]	WU Weitao ZHANG Jianqing ZENG Chaoliu NIU Yan SHEN Weiliang Corrosion Science Laboratory,Institute of Corrosion and Protection of Metals,Academia Sinica,Shenyang,China Professor,Institute of Corrosion and Protection of Metals,Academia Sinica,Shenyang 110015,China. HOT CORROSION OF Ni_3Al-0.2B IN MOLTEN NaCl-(Na,K)_2SO_4 [J]. Acta Metallurgica Sinica (English Letters), 1993, 6(7): 11-15.
[8]	GUO Jianting HUANG Rongfang Institute of Metal Research,Academia Sinica,Shenyang,ChinaYANG Hongcai MA Jun Northeast University of Technology,Shenyang,China GUO Jianting,Associate Professor,Institute of Metal Research,Academia Sinica,Shengyang,China. ENVIRONMENTAL DAMAGE OF CAST Ni-BASE SUPERALLOY K17 [J]. Acta Metallurgica Sinica (English Letters), 1989, 2(1): 51-56.

HOT CORROSION BEHAVIOR OF K38G ALLOY AND ITS SPUTTERED NANOCRYSTALLINE COATING BY PRE-DEPOSITED SULFATE AT 900℃

PDF (PC)

Knowledge

Abstract

Cite this article

share this article

References

Related Articles 8

Recommended Articles

Metrics

Comments