铅铋共晶合金的流动速度对CLAM钢腐蚀行为的影响

doi:10.11896/cldb.18110053

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Abstract Aiming at exploring the corrosion behavior of CLAM steel in lead bismuth eutectic alloy (LBE) with diverse relative flow velocities, the corrosion tests of CLAM steel in liquid LBE with diverse flow velocities (0 m/s, 1.70 m/s, 2.98 m/s, 3.69 m/s, 4.77 m/s) at 550 ℃ for 500 h were carried out. The SEM, XRD were employed to characterize the the surface of CLAM steel samples after corrosion, and the SEM-EDS analysis and mapping scanning were conducted on the cross section of the corrosion samples of CLAM steel, respectively. After the corrosion test for 500 h, a bilayer oxide structure could be found on the surface of the CLAM steel samples. The outer oxide layer was composed of Fe₃O₄, and the inner oxide layer was composed of (Fe,Cr)₃O₄. When the relative flow velocity of LBE increased from 0 m/s to 2.98 m/s, the thickness of the oxide layer on the samples grew gradually, which could be attributed to the acceleration of the dissolution of Fe and diffusion migration of O by the increasing LBE relative flow rate, leading to critical oxidation corrosion. However, when the relative flow velocity of LBE rose from 2.98 m/s to 4.77 m/s, the thickness of the oxide layer on the samples decreased gradually, which because the degree of erosion-corrosion aggravated with the increase of the LBE flow velocity, and the oxide layer suffered a certain degree of spalling. Therefore, the thickness of the oxide layer gradually decreased with the increase of the LBE flow velocity.The results of the study on the corrosion behavior of CLAM steel in liquid LBE with various flow velocities are expected to provide data support and reference for the practical application of ADS system in the future.

Key words： China low activation martensitic (CLAM) steel lead bismuth eutectic alloy (LBE) flow velocity oxidation corrosion corrosion rate

Published: 16 September 2019

CLC number:

TL341

Fund:This work was financially supported by the National Natural Science Foundation of China (51875264), the National Natural Science Foundation Youth Fund of China (51505197).

About author:: Gang Chenpursued his doctoral degree in Jiangsu University from September 2015 to June 2019. He is mainly engaged in research on the corrosion of nuclear materials in lead-bismuth eutectic alloys. He has published more than 10 articles in important journals domestically and abroad.
Yucheng Lei, born in 1962, Ph.D., professor, and doctoral supervisor, is mainly engaged in the connection technology of advanced materials and the control and simulation of welding process. He has been responsible for a number of Natural Science Foundation of China. He has published more than 150 papers in important journals domestically and abroad, and he has authorized 8 national invention patents.

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	CHEN Gang
	LEI Yucheng
	JU Na
	ZHU Qiang
	WANG Dan
	LI Tianqing

Cite this article:

CHEN Gang,LEI Yucheng,JU Na, et al. Corrosion Behavior of CLAM Steel in Various Flow Velocities of Pb-Bi Eutectic Alloy[J]. Materials Reports, 2019, 33(22): 3772-3776.

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http://www.mater-rep.com/EN/10.11896/cldb.18110053 OR http://www.mater-rep.com/EN/Y2019/V33/I22/3772

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