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304不锈钢两相流冲蚀腐蚀的实验研究

赵彦琳 杨少帅 姚军

赵彦琳, 杨少帅, 姚军等 . 304不锈钢两相流冲蚀腐蚀的实验研究[J]. 北京航空航天大学学报, 2019, 45(8): 1504-1511. doi: 10.13700/j.bh.1001-5965.2018.0728
引用本文: 赵彦琳, 杨少帅, 姚军等 . 304不锈钢两相流冲蚀腐蚀的实验研究[J]. 北京航空航天大学学报, 2019, 45(8): 1504-1511. doi: 10.13700/j.bh.1001-5965.2018.0728
ZHAO Yanlin, YANG Shaoshuai, YAO Junet al. Experimental study on erosion-corrosion of 304 stainless steel under two-phase flow condition[J]. Journal of Beijing University of Aeronautics and Astronautics, 2019, 45(8): 1504-1511. doi: 10.13700/j.bh.1001-5965.2018.0728(in Chinese)
Citation: ZHAO Yanlin, YANG Shaoshuai, YAO Junet al. Experimental study on erosion-corrosion of 304 stainless steel under two-phase flow condition[J]. Journal of Beijing University of Aeronautics and Astronautics, 2019, 45(8): 1504-1511. doi: 10.13700/j.bh.1001-5965.2018.0728(in Chinese)

304不锈钢两相流冲蚀腐蚀的实验研究

doi: 10.13700/j.bh.1001-5965.2018.0728
基金项目: 

国家自然科学基金 51776225

国家自然科学基金 51876221

详细信息
    作者简介:

    赵彦琳  女, 博士, 副教授。主要研究方向:多相流测量、多相流冲蚀腐蚀

    姚军  男, 博士, 教授。主要研究方向:多相流流动

    通讯作者:

    姚军, E-mail: yaojun@cup.edu.cn

  • 中图分类号: TK121;V250.3

Experimental study on erosion-corrosion of 304 stainless steel under two-phase flow condition

Funds: 

National Natural Science Foundation of China 51776225

National Natural Science Foundation of China 51876221

More Information
  • 摘要:

    通过液固两相流冲蚀腐蚀实验,辅以电化学测量方法,研究了不同冲角(45°,60°,90°)、冲蚀时间、流体性质(有无氯离子)等因素对304不锈钢冲蚀腐蚀的影响。实验结果表明,模拟海水(NaCl的质量分数为3.5%)中的氯离子极大促进了颗粒对材料的冲蚀效果,45°冲角下氯离子对冲蚀腐蚀的促进作用最为显著,其次是90°和60°冲角。金相显微照片显示了冲蚀时间对样品表面形貌的影响。在3个不同冲角冲蚀腐蚀下,电化学测试表明,材料钝化膜随冲蚀腐蚀时间增加而变得不完整是不锈钢材料抗腐蚀性能下降的主要原因。

     

  • 图 1  冲蚀实验装置

    Figure 1.  Experimental setup of erosion

    图 2  样品支架示意图

    Figure 2.  Schematic of sample holder

    图 3  304不锈钢在有无NaCl介质中冲蚀腐蚀的累积质量损失变化

    Figure 3.  Cumulative variation of 304 stainless steel weight loss in erosion environment (with and without NaCl)

    图 4  304不锈钢在不同冲角下冲蚀和冲蚀腐蚀累积质量损失对比

    Figure 4.  Comparison of weight loss of erosion and erosion-corrosion of 304 stainless steel at different impact angles

    图 5  304不锈钢在模拟海水中纯冲蚀质量损失和冲蚀腐蚀质量损失所占比例

    Figure 5.  Proportion of pure erosion and erosion-corrosion interaction in total weight loss of 304 stainless steel after impingement in simulated seawater

    图 6  304不锈钢在45°冲角下冲蚀腐蚀各阶段的金相显微照片

    Figure 6.  Metallographic photographs of various stages of erosion-corrosion of 304 stainless steel at 45° impact angle

    图 7  304不锈钢在不同冲角下冲蚀腐蚀各阶段的动电位极化曲线

    Figure 7.  Potentiodynamic polarization curves of various stages of erosion-corrosion of 304 stainless steel at different impact angles

    图 8  304不锈钢在不同冲角下冲蚀腐蚀各阶段的奈奎斯特图

    Figure 8.  Nyquist curves of various stages of erosion-corrosion of 304 stainless steel at different impact angles

    图 9  等效电路模型

    Figure 9.  Equivalent circuit model

    表  1  304不锈钢化学元素组分

    Table  1.   Chemical composition of 304 stainless steel

    化学元素 质量分数/%
    C 0.03
    Si 0.3
    Mn 1.6
    Ni 10.9
    Cr 18.4
    S 0.01
    P 0.03
    Fe 68.73
    下载: 导出CSV

    表  2  304不锈钢在不同冲角下冲蚀腐蚀各阶段的等效电路模型拟合参数

    Table  2.   Equivalent circuit model fitting parameters of various stages of erosion-corrosion of 304 stainless steel at different impacting angles

    冲角/(°) 冲蚀时间/h Rs/(Ω·cm2) CPEf/(10-4Ω-1·cm-2·Sn) nf Rf/(104Ω·cm2) χ2
    45 1 15.84 1.79 0.81 5.48 0.02
    6 15.98 1.83 0.84 4.24 0.01
    12 16.18 2.4 0.78 1.37 0.03
    60 1 15.16 1.75 0.82 12.1 0.02
    6 16.03 2.41 0.78 4.19 0.01
    12 15.76 1.76 0.79 1.71 0.10
    90 1 14.55 2.38 0.82 6.10 0.02
    6 15.47 2.71 0.77 1.28 0.03
    12 15.43 3.04 0.75 1.01 0.03
    下载: 导出CSV
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出版历程
  • 收稿日期:  2018-12-17
  • 录用日期:  2019-03-15
  • 刊出日期:  2019-08-20

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