CORROSION BEHAVIOR OF NICKEL BASE ALLOY FGH95 IN MOLTEN NaCl–Na2SO4

Acta Metall Sin

2009, Vol. 45

Issue (2): 204-210 DOI:

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CORROSION BEHAVIOR OF NICKEL BASE ALLOY FGH95 IN MOLTEN NaCl–Na₂SO₄

LÜ Jiaxin; ZHENG Lei; ZHANG Maicang; DONG Jianxin

School of Materials Science and Engineering; University of Science and Technology Beijing; Beijing 100083

Cite this article:

LV Jiaxin; ZHENG Lei; ZHANG Maicang; DONG Jianxin. CORROSION BEHAVIOR OF NICKEL BASE ALLOY FGH95 IN MOLTEN NaCl–Na₂SO₄. Acta Metall Sin, 2009, 45(2): 204-210.

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Abstract

The corrosion behavior and corrosion kinetics of FGH95 alloy at different temperatures were investigated by TGA, XRD, SEM and EDS. The results show that FGH95 alloy has good hot corrosion resistance characteristics at 650 ℃, and its corrosion kinetic curve obeys a parabolic rule. When the temperatures increase up to 700 and 750℃, the hot corrosion resistance of FGH95 alloy decreases and corrosion is serious. XRD, SEM and EDS indicate that the oxidized layer is mainly composed of NiO, Ni₃S₂ and Cr₂O₃, and there exists a little amount of NiCr₂O₄ and NaCl at 700 and 750 ℃, respectively.

Key words: Ni base alloy hot corrosion molten salt hot corrosion resistance

Received: 15 July 2008

ZTFLH:

TG172.82

Fund:

Supported by National Natural Science Foundation of China (No.50831008)

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https://www.ams.org.cn/EN/ OR https://www.ams.org.cn/EN/Y2009/V45/I2/204

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