工程科学学报2017，Vol.39Issue(3)：399-406,8.DOI:10.13374/j.issn2095-9389.2017.03.012
304不锈钢在模拟压水堆一回路水中高温电化学腐蚀行为
Electrochemical corrosion behavior of 304 stainless steel in simulated pressurized water reactor primary water
摘要
Abstract
The effects of chloride concentration and dissolved oxygen on the high-temperature electrochemical corrosion behaviors of 304 stainless steel sheets were investigated in simulated pressurized water reactor ( PWR) primary water. The results of potentiody-namic polarization measurements reveal that the chloride ion mainly affects the second passivation region under high potential, but little effect under low potential. Oxide film chemical content analysis by X-ray photoelectron spectroscopy ( XPS) shows that the second pas-sivation properties are closely related to the Fe/Cr ratio of the oxide film. Electrochemical impedance spectroscopy ( EIS) and scan-ning electron microscopy ( SEM) results show that, when the chloride ion concentration increases, the oxide film resistance decreases, the size of oxide particles and the gap between oxide particles on the outer layer increases and the corrosion resistance decreases. Besides, with the increase of dissolved oxygen, the corrosion potential increases, the passive current density decreases, the passive potential region shrinks, and the oxide film resistance gradually increases.关键词
不锈钢/压水堆/高温/电化学/钢腐蚀Key words
stainless steel/pressurized water reactors/high temperature/electrochemistry/steel corrosion分类
能源科技引用本文复制引用
汪家梅,陆辉,张乐福,孟凡江,徐雪莲..304不锈钢在模拟压水堆一回路水中高温电化学腐蚀行为[J].工程科学学报,2017,39(3):399-406,8.基金项目
重大专项CAP1400关键设计技术研究资助项目(2010ZX06002-001) （2010ZX06002-001）
