铁素体-马氏体P92钢在600 ℃/25 MPa超临界水中的氧化特性

doi:10.11902/1005.4537.2013.085

中国腐蚀与防护学报

2014, Vol. 34

Issue (2): 119-124 DOI: 10.11902/1005.4537.2013.085

研究报告

本期目录 | 过刊浏览

铁素体-马氏体P92钢在600 ℃/25 MPa超临界水中的氧化特性

徐鸿, 袁军, 朱忠亮, 张乾, 张乃强

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

Oxidation Behavior of Ferritic-martensitic Steel P92 Exposed to Supercritical Water at 600 ℃/25 MPa

XU Hong, YUAN Jun, ZHU Zhongliang, ZHANG Qian, ZHANG Naiqiang

Key Laboratory of Condition Monitoring and Control for Power Plant Equipment of Ministry of Education, North China Electric Power University, Beijing 102206, China

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摘要:

针对超超临界机组典型用钢铁素体/马氏体P92钢在600 ℃，25 MPa，溶解氧浓度分别为0，100和300 μg/L的超临界水环境中进行了氧化实验研究。结果表明：氧化层为典型的双层结构，外层为富Fe的Fe₃O₄，内层为富Cr的Fe-Cr尖晶石氧化物；不同于550 ℃超临界水环境的氧化结果，氧化膜在氧化初期就产生了裂纹；溶解氧浓度为300 μg/L条件下的氧化试样，内层氧化物与基体之间产生明显的裂缝。并讨论了溶解氧对氧化增重和裂缝形成的影响。

关键词 ： P92钢, 氧化, 超临界水, 溶解氧

Abstract：The oxidation behavior of ferritic-martensitic P92 steel was studied in supercritical waters containing different dissolved oxygen of 0, 100 and 300 μg/L at 600 ℃ under 25 MPa. The results show that a typical double-layered oxide scale is formed on all the samples, which consists an outer layer Fe-rich magnetite and an inner layer Cr-rich Fe-Cr spinel. Cracks on the surface of oxide scales are found at the initial oxidation stage, which is different from the experimental phenomenon in supercritical water at 550 ℃. A distinct gap between inner oxide layer and substrate alloy is observed in some regions of the sample which is exposed to the supercritical water containing 300 μg/L dissolved oxygen. The mechanism concerning the influence of dissolved oxygen on oxidation behavior and the gap formation is further discussed.

Key words： P92 steel oxidation supercritical water dissolved oxygen

收稿日期: 2013-06-07

ZTFLH:

TK224

基金资助:国家自然科学基金重点项目 (51134016)，国家自然科学基金青年基金项目 (51201064) 和中央高校基本科研业务费专项资金项目资助

通讯作者: 张乃强，E-mail：naiqiang@mit.edu

作者简介: 徐鸿，男，1959年生，教授、博士，研究方向为电站设备状态评估与寿命管理、高温部件损伤表征与检测技术、火电厂节能

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引用本文:

徐鸿, 袁军, 朱忠亮, 张乾, 张乃强. 铁素体-马氏体P92钢在600 ℃/25 MPa超临界水中的氧化特性[J]. 中国腐蚀与防护学报, 2014, 34(2): 119-124.
XU Hong, YUAN Jun, ZHU Zhongliang, ZHANG Qian, ZHANG Naiqiang. Oxidation Behavior of Ferritic-martensitic Steel P92 Exposed to Supercritical Water at 600 ℃/25 MPa. Journal of Chinese Society for Corrosion and protection, 2014, 34(2): 119-124.

链接本文:

https://www.jcscp.org/CN/10.11902/1005.4537.2013.085 或 https://www.jcscp.org/CN/Y2014/V34/I2/119

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