Effect of Zn Addition on Composition of Oxide Scales Formed on 316L Stainless Steel in High-temperature and High-pressured Water

doi:10.11902/1005.4537.2013.107

Journal of Chinese Society for Corrosion and protection

2014, Vol. 34

Issue (3): 249-252 DOI: 10.11902/1005.4537.2013.107

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Effect of Zn Addition on Composition of Oxide Scales Formed on 316L Stainless Steel in High-temperature and High-pressured Water

DUAN Zhengang¹, ZHANG Lefu¹(

), WANG Li¹, XU Xuelian², SHI Xiuqiang²

1. School of Nuclear Science and Engineering, Shanghai Jiaotong University, Shanghai 200240, China
2. Shanghai Municipal Key Laboratory of Nuclear Power Engineering, Shanghai Nuclear Engineering Research &Design Institute, Shanghai 200233, China

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Abstract

The effect of Zn addition on the composition of oxide scales formed on 316L stainless steel has been studied in high-temperature and high pressured waters, which aim to simulate the primary loop water environment of pressurized water reactor (PWR). Then, the formed oxide scales on the steel are analyzed by X-ray photoelectron spectroscopy (XPS). The results show that after soaked in water with 10 μg/kg Zn addition at 320 ℃ for 1000 h, compact oxide scales formed on the steel, which consist mainly of (Zn, Fe, Ni)(Cr, Fe)₂O₄, with an inner portion rich in Cr. However, the Cr rich portion extends gradually outwards to lead the whole oxide scale to become the same with the increasing exposed time.

Key words: zinc addition 316L stainless steel PWR oxide film

Received: 05 June 2013

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	Zhengang DUAN
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	Xiuqiang SHI

Cite this article:

DUAN Zhengang, ZHANG Lefu, WANG Li, XU Xuelian, SHI Xiuqiang. Effect of Zn Addition on Composition of Oxide Scales Formed on 316L Stainless Steel in High-temperature and High-pressured Water. Journal of Chinese Society for Corrosion and protection, 2014, 34(3): 249-252.

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https://www.jcscp.org/EN/10.11902/1005.4537.2013.107 OR https://www.jcscp.org/EN/Y2014/V34/I3/249

Fig.1

动水加锌回路示意图

Fig.2

316L不锈钢在含锌10 μg/kg条件下的腐蚀增重曲线

Fig.3

316L不锈钢在320 ℃含锌10 μg/kg溶液中腐蚀1000 h后的全谱

Fig.4

316L不锈钢在10 μg/kg注锌溶液中分别腐蚀400,600和1000 h后的XPS深度分析谱

Fig.5

316L不锈钢在320 ℃, 含锌10 μg/kg溶液中腐蚀不同时间后,表面氧化层XPS深度分析的分价态谱

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