超临界水中310-ODS钢表面氧化膜形成机制和性能

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

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

(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

(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/Abstract

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:

TL 341

陆辉，沈朝，张乐福. 超临界水中310-ODS钢表面氧化膜形成机制和性能[J]. 上海交通大学学报（自然版）, 2016, 50(04): 528-533.

LU Hui,SHEN Zhao,ZHANG Lefu. Formation Mechanism and Properties of Oxide Film on 310-ODS Steel in Supercritical Water[J]. Journal of Shanghai Jiaotong University, 2016, 50(04): 528-533.

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