上海交通大学学报(自然版) ›› 2016, Vol. 50 ›› Issue (04): 528-533.

• 原子能技术 • 上一篇    下一篇

超临界水中310-ODS钢表面氧化膜形成机制和性能

陆辉,沈朝,张乐福   

  1. (上海交通大学 核科学与工程学院, 上海 200240)
  • 收稿日期:2015-03-12 出版日期:2016-04-28 发布日期:2016-04-28
  • 基金资助:
    国家重点基础研究发展规划(973)项目(2007CB209802)资助

Formation Mechanism and Properties of Oxide Film on 310-ODS Steel in Supercritical Water

LU Hui,SHEN Zhao,ZHANG Lefu   

  1. (School of Nuclear Science and Engineering, Shanghai Jiaotong University, Shanghai 200240, China)
  • Received:2015-03-12 Online:2016-04-28 Published:2016-04-28

摘要: 摘要: 采用腐蚀增重方法研究310ODS钢在600℃低溶氧的超临界水中的全面腐蚀敏感性,取样周期分别为100、300、600、1 000、1 500 h,对试样表面氧化膜进行扫描电镜、能谱仪和X射线衍射仪分析.结果表明:310ODS钢在浸泡早期(300 h)已经在表面形成较为致密的氧化膜,腐蚀速率快速降低;氧化膜为双层结构,内层致密富Cr,外层多孔富Fe,随着浸泡时间的增加,内层变得均匀,外层变化不大.310-ODS钢在600℃超临界水中的氧化过程满足固态生长机制,晶界处的Y2O3改善了材料的耐腐蚀性能.

关键词: 310-ODS钢, 超临界水, 全面腐蚀

Abstract: Abstract: The general corrosion susceptibility of 310ODS steel was evaluated in 600℃ supercritical deaerated water by weight gain. The sample periods were 100, 300, 600, 1 000, and 1 500 h. The surface oxide film of 310ODS steel was analyzed by using scanning electron microscope (SEM), energy disperse spectroscopy (EDS) and Xray diffractometer (XRD). The results show that a dense oxide film is formed on the surface of 310ODS steel during the early days (300 h) and the corrosion rate decreases rapidly. The oxide film is a doublelayer structure with a dense Crenriched inner layer and a porous Feenriched outer layer. The inner layer becomes uniform and the outer layer does not change with the immersing time. The oxidation process of 310-ODS steel in 600℃ supercritical deaerated water meets the solidstate growth mechanism and Y2O3 in the grain boundaries improves the corrosion resistance.

Key words: Key words: 310-ODS steel; supercritical water, general corrosion

中图分类号: