Electrochemical corrosion behaviors of alloy 690 in high-temperature and high-pressure water

被引：0

作者：

Wang J. ^{[1
]}

Duan Z. ^{[1
]}

Zhang L. ^{[1
]}

Meng F. ^{[2
]}

Shi X. ^{[2
]}

机构：

[1] School of Nuclear Science and Engineering, Shanghai Jiaotong University, Shanghai

[2] Shanghai Nuclear Engineering Research and Design Institute, Shanghai

来源：

Shanghai Jiaotong Daxue Xuebao/Journal of Shanghai Jiaotong University | 2016年 / 50卷 / 04期

关键词：

Alloy; 690; High-temperature electrochemistry; Pressurized water reactor(PWR); Uniform corrosion;

D O I：

10.16183/j.cnki.jsjtu.2016.04.006

中图分类号：

学科分类号：

摘要：

The effects of temperature (25 to 285℃) and dissolved oxygen(20 μg/L, 2.1 mg/L, 8.4 mg/L) on high-temperature electrochemical corrosion behaviors of Alloy 690, and the uniform corrosion behaviors of Alloy 690 were investigated in stimulated pressurized water reactor (PWR) primary water. The results of potentionamic polarization measurements and X-ray photoelectron spectroscopy (XPS) reveal that the corrosion potential(Ecorr) decreases, the corrosion current density(Icorr) increases, and the passive potential region shrinks with the increase of temperature while the corrosion potential increases, the corrosion current density decreases, and the passive potential region shrinks with the increase of DO. The uniform corrosion rate of Alloy 690 exposed in investigated conditions is 0.244 mg/(dm2·h1/2), and the oxide, of which the outer layer is rich in Fe-Cr-Ni hydroxide and the inner layer is rich in Fe-Cr-Ni oxide, is formed on Alloy 690. © 2016, Editorial Board of Journal of Shanghai Jiao Tong University. All right reserved.

引用

页码：514 / 520

页数：6

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