CORROSION BEHAVIORS OF Ni-Cr-Mo CORROSION RESISTENCE ALLOYS IN CaCl2-CaF2 MOLTEN SALT

doi:10.3724/SP.J.1037.2011.00108

Acta Metall Sin

2011, Vol. 47

Issue (9): 1195-1199 DOI: 10.3724/SP.J.1037.2011.00108

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CORROSION BEHAVIORS OF Ni-Cr-Mo CORROSION RESISTENCE ALLOYS IN CaCl₂-CaF₂ MOLTEN SALT

PENG Haijian, JIN Jun, LI Defu, HU Jie

General Research Institute for Non-ferrous Metals, Beijing 100088

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PENG Haijian JIN Jun LI Defu HU Jie. CORROSION BEHAVIORS OF Ni-Cr-Mo CORROSION RESISTENCE ALLOYS IN CaCl₂-CaF₂ MOLTEN SALT. Acta Metall Sin, 2011, 47(9): 1195-1199.

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Abstract The corrosion behaviors of Hastelloy C276 alloy and Hastelloy N alloy in 80%CaCl₂+20%CaF₂ (mass fraction) molten salt were investigated by XRD, OM, SEM and EDS. The results show that intergranular corrosion takes place in the two alloys, and the form of intergranular corrosion is a type of selective corrosion, i.e., the desolutions of Cr and Mo occur along the grain boundary. The corrosion rates of the two alloys decelerate with the increases of corrosion time because of the hindering effect of corrosion products on the element diffusion, and the relationship of mass loss ($C$) and corrosion time (t) can be described by formula of C=Ktⁿ.

Key words: Ni-Cr-Mo alloy CaCl₂-CaF₂ molten salt corrosion

Received: 04 March 2011

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	PENG Hai-Jian
	JIN Jun
	LI De-Fu
	HU Cha
	XU Xiao-Jing
	MAO Bai-Beng

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https://www.ams.org.cn/EN/10.3724/SP.J.1037.2011.00108 OR https://www.ams.org.cn/EN/Y2011/V47/I9/1195

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