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中国腐蚀与防护学报  2020, Vol. 40 Issue (3): 266-272    DOI: 10.11902/1005.4537.2019.083
  研究报告 本期目录 | 过刊浏览 |
超超临界电站国产奥氏体钢C-HRA-5在超临界水中的氧化特性
方旭东1, 刘晓2, 徐芳泓1,3, 李瑞涛2, 朱忠亮2, 张乃强2()
1 太原钢铁 (集团) 有限公司 先进不锈钢材料重点实验室 太原 030003
2 华北电力大学 电站设备状态监测与控制教育部重点实验室 北京 102206
3 山西太钢不锈钢股份有限公司技术中心 太原 030003
Oxidation Behavior in Supercritical Water of Domestic Austenitic Steel C-HRA-5 for Uultra-supercritical Power Stations
FANG Xudong1, LIU Xiao2, XU Fanghong1,3, LI Ruitao2, ZHU Zhongliang2, ZHANG Naiqiang2()
1 Key Laboratory of Advanced Stainless Steel Materials, Taiyuan Iron and Steel (Group) Co. , Ltd. , Taiyuan 030003, China
2 Key Laboratory of Condition Monitoring and Control for Power Plant Equipment of Ministry of Education, North China Electric Power University, Beijing 102206, China
3 Technology Center of Shanxi Taigang Stainless Steel Co. , Ltd. , Taiyuan 030003, China
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摘要: 

研究了奥氏体不锈钢C-HRA-5,在650 ℃/25 MPa和700 ℃/25 MPa超临界水环境中的氧化性能,借助SEM、EDS、XRD及Raman光谱等手段分析了C-HRA-5钢的氧化膜形貌、分布及成分,并探讨了奥氏体钢在超临界水中的氧化机理。结果表明,C-HRA-5钢在超临界水中生成了富Fe/富Cr双层结构氧化膜,氧化膜与基体间存在较薄的内氧化过渡区。随着温度的升高,C-HRA-5钢的氧化增重速率逐渐增大,且700 ℃的氧化增重速率大于650 ℃的氧化增重速率。氧化动力学规律在650与700 ℃时分别呈现近似抛物线和立方规律。

关键词 奥氏体钢氧化超临界水氧化特性    
Abstract

The oxidation behavior of austenitic stainless steel C-HRA-5 was studied in 650 ℃/25 MPa and 700 ℃/25 MPa supercritical water. Then its oxidation products were characterized by means of SEM, EDS, XRD and Raman spectroscopy in terms of the morphology and composition. Results show that a double layered oxide scale rich in Fe and Cr was formed on C-HRA-5 steel after oxidation test in the supercritical water, while a thin internal oxidation transition zone was also formed between the outer oxide scale and the matrix. As the temperature increases, the oxidation weight gain rate of C-HRA-5 increases gradually, and the oxidation weight gain rate at 700 ℃ is greater than the that at 650 ℃. The oxidation kinetics follows approximately parabolic and cubic law at 650 and 700 ℃, respectively.

Key wordsaustenitic steel    oxidation    supercritical water    oxidation behavior
收稿日期: 2019-06-17     
ZTFLH:  TK245  
基金资助:山西省重大专项(2018101014);北京市科技计划(Z181100005218006);北京市自然科学基金(2194085)
通讯作者: 张乃强     E-mail: zhnq@ncepu.edu.cn
Corresponding author: ZHANG Naiqiang     E-mail: zhnq@ncepu.edu.cn
作者简介: 方旭东,男,1975年生,硕士

引用本文:

方旭东, 刘晓, 徐芳泓, 李瑞涛, 朱忠亮, 张乃强. 超超临界电站国产奥氏体钢C-HRA-5在超临界水中的氧化特性[J]. 中国腐蚀与防护学报, 2020, 40(3): 266-272.
Xudong FANG, Xiao LIU, Fanghong XU, Ruitao LI, Zhongliang ZHU, Naiqiang ZHANG. Oxidation Behavior in Supercritical Water of Domestic Austenitic Steel C-HRA-5 for Uultra-supercritical Power Stations. Journal of Chinese Society for Corrosion and protection, 2020, 40(3): 266-272.

链接本文:

https://www.jcscp.org/CN/10.11902/1005.4537.2019.083      或      https://www.jcscp.org/CN/Y2020/V40/I3/266

图1  C-HRA-5钢在650 ℃/25 MPa和700 ℃/25 MPa超临界水中的氧化增重曲线
图2  C-HRA-5钢在超临界水中氧化不同时间后氧化物表面形貌
图3  图2标记区的EDS图
图4  C-HRA-5钢在超临界水中氧化不同时间后的氧化物表面形貌
图5  C-HRA-5钢在超临界水中氧化1000 h后的XRD谱
图6  C-HRA-5钢在超临界水中氧化1000 h后的Raman谱
No.Fe2O3Cr2O3FeCr2O4
1740609693*
2650*551*573
3505530478
4380397340
表1  3种Fe-Cr氧化物的Raman光谱特征峰值
图7  C-HRA-5钢在超临界水中氧化1000 h后的横截面形貌及元素分布图
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