| 三种压力管道金属材料的流动加速腐蚀性能研究 |
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| 引用本文： | 朱晓磊,陆晓峰,凌祥.三种压力管道金属材料的流动加速腐蚀性能研究[J].腐蚀科学与防护技术,2012,24(1):57-60. |
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| 作者姓名： | 朱晓磊 陆晓峰 凌祥 |
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| 作者单位： | 南京工业大学机械与动力工程学院, 南京 210009 |
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| 摘 要： | 建立一套温度、压力、流速可控的流动加速腐蚀试验装置, 模拟某蒸汽冷凝水管线工况, 对20钢、Q345R钢、304不锈钢三种材料进行了流动加速腐蚀试验, 采用电化学测量方法得到三种钢的Tafel曲线. 应用扫描电镜(SEM)和能谱仪(EDS)对腐蚀产物膜的厚度、形貌与组分进行了分析. 结果表明, 相同工况条件下, 腐蚀速度从大到小依次为20钢、Q345R钢、304不锈钢; 20钢的腐蚀产物膜结构为球状; Q345R钢存在两种腐蚀产物膜结构, 即网状结构和片状结构; 304不锈钢腐蚀产物膜的结构为片状, 有效的保护了基体材料.
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| 关 键 词： | 流动加速腐蚀 20钢 304不锈钢 Q345钢 压力管道 |
| 收稿时间： | 2010-09-17 |
| 修稿时间： | 2010-12-02 |
Flow-accelerated-corrosion Performance of Three Pressure Piping Steels |
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| ZHU Xiao-lei,LU Xiao-feng,LING Xiang.Flow-accelerated-corrosion Performance of Three Pressure Piping Steels[J].Corrosion Science and Protection Technology,2012,24(1):57-60. |
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| Authors: | ZHU Xiao-lei LU Xiao-feng LING Xiang |
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| Affiliation: | School of Mechanical and Power Engineering, Nanjing University of Technology, Nanjing 210009 |
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| Abstract: | The flow-accelerated-corrosion performance of 20 steel, Q345R steel and 304 stainless steel was investigated in condensed water by using a flow accelerated corrosion test apparatus with three electrodes measurement. Scanning electron microscope (SEM) and energy disperse spectroscopy (EDS) were employed to investigate the thickness, microstructure of corrosion scale. The results showed that the corrosion rates of the test steels were different with a decrease ranking as 20 steel>Q345R steel>304 stainless steel. Their microstructure of corrosion scale had different morphologies. The corrosion scale of Q345R steel was thicker than that of 20steel, but much better of compactness of the former ones. |
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| Keywords: | flow-accelerated-corrosion 20 steel Q345R steel 304 stainless steel pressure pipeline |
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