Magnetoelectropolishing treatment for improving the oxidation resistance of 316L stainless steel in pressurized water reactor primary water

被引：18
作者：
Xiao, Qian [1 ,2 ]
Lu, Zhanpeng [1 ,2 ]
Chen, Junjie [1 ,2 ]
Ma, Jiarong [1 ,2 ]
Xiong, Qi [1 ,2 ]
Li, Hongjuan [1 ,2 ]
Xu, Jian [3 ]
Shoji, Tetsuo [3 ]
机构：
[1] Shanghai Univ, Sch Mat Sci & Engn, Inst Mat, 149 Yanchang Rd, Shanghai 200072, Peoples R China
[2] Shanghai Univ, State Key Lab Adv Special Steels, 149 Yanchang Rd, Shanghai 200072, Peoples R China
[3] Tohoku Univ, New Ind Creat Hatchery Ctr, Sendai, Miyagi 9808579, Japan
来源：
JOURNAL OF NUCLEAR MATERIALS | 2019年 / 518卷
基金：
国家重点研发计划; 中国国家自然科学基金;
关键词：
Stainless steel; Pressurized water reactor; Primary water; Magnetoelectropolishing; Oxide film; STRESS-CORROSION CRACKING; PWR PRIMARY WATER; REVISED POURBAIX DIAGRAMS; NICKEL-BASE ALLOYS; HIGH-TEMPERATURE; MAGNETIC-FIELD; OXIDE-FILMS; SURFACE PREPARATION; IRON; SS;
D O I：
10.1016/j.jnucmat.2019.03.028
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
The surfaces of 316L stainless steel with mechanical polishing (MP) or electropolishing (EP) in the presence of a magnetic field (MEP) before and after exposure to simulated pressurized water reactor (PWR) primary water were characterized by various techniques such as SEM, Raman spectroscopy, XPS and TEM measurements. The surface microhardness was lower and the surface roughness was higher for the as-treated MEP specimen than for the as-treated MP specimen. The oxide films that formed on the as-treated MP and MEP surfaces were nanometer-thick and rich in chromium. The Cr/(Fe + Ni) ratio of the as-treated MEP surface film was higher than that of the as-treated MP surface film. After exposure to simulated PWR primary water at 310 degrees C for 1050 h, a dark double oxide layer that was approximately 662 nm thick formed on the MP surface, while the MEP surface retained its original brightness as before exposure with a nanometer-thick oxide layer with a high Cr content. The MP and MEP specimens showed different oxidation kinetics when exposed to high temperature water. The high Cr/(Fe + Ni) ratio of the surface film on the MEP 316L SS contributed to its excellent oxidation resistance in simulated PWR primary water. (C) 2019 Elsevier B.V. All rights reserved.
引用
收藏
页码：357 / 369
页数：13
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