| 含硫代硫酸根铝酸钠溶液中时间 对Q345钢腐蚀的影响 |
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| 引用本文： | 付慧,陈朝轶,李军旗,兰苑培,张湘黔,苑京久.含硫代硫酸根铝酸钠溶液中时间 对Q345钢腐蚀的影响[J].表面技术,2018,47(11):166-172. |
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| 作者姓名： | 付慧 陈朝轶 李军旗 兰苑培 张湘黔 苑京久 |
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| 作者单位： | 贵州大学 材料与冶金学院,贵阳550025;贵州省冶金工程与过程节能重点实验室,贵阳550025;贵州大学 材料与冶金学院,贵阳550025;贵州省冶金工程与过程节能重点实验室,贵阳550025;贵州大学 材料与冶金学院,贵阳550025;贵州省冶金工程与过程节能重点实验室,贵阳550025;贵州大学 材料与冶金学院,贵阳550025;贵州省冶金工程与过程节能重点实验室,贵阳550025;贵州大学 材料与冶金学院,贵阳550025;贵州省冶金工程与过程节能重点实验室,贵阳550025;贵州大学 材料与冶金学院,贵阳550025;贵州省冶金工程与过程节能重点实验室,贵阳550025 |
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| 基金项目： | 国家自然科学基金（51574095，51474079，51774102）；贵州省教育厅项目（黔教合KY（2015）334）；黔科合平台人才（[2017]5626，[2017]5788） |
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| 摘 要： | 目的 在含4 g/L S2O32?的铝酸钠溶液中，研究腐蚀时间对Q345钢腐蚀行为的影响，探索腐蚀规律，明确腐蚀机理。方法 采用盐雾腐蚀和电化学腐蚀实验，通过腐蚀失重法、极化曲线、阻抗谱、SEM、EDS等手段，研究Q345钢的腐蚀行为。结果 当腐蚀时间从3 d延长至7 d时，腐蚀失重从2.4505 g/m2增大至2.6420 g/m2，点蚀深度从3.3 μm升高至4.6 μm，超过7 d以后，趋于稳定。腐蚀速率方程为V =2.426t?0.975，1~3 d范围内，腐蚀速率急剧下降。初期腐蚀电流密度较大，由3 d增至5 d时，腐蚀电流密度由6.538 μA/cm2迅速降低至0.785 μA/cm2，之后逐渐降低至0.308 μA/cm2（9 d），容抗半径和电荷转移电阻Rct均随腐蚀时间的增加而增加。腐蚀时间延长，产物中O、Al、S等元素的含量增加，Fe元素含量降低。结论 腐蚀初期，OH?优先吸附，生成较致密的Fe3O4与FeOOH；腐蚀中期，S2O32?与基体反应形成粘附力弱的FeS，使得Fe3O4结构不稳定而脱落，产物结构疏松；腐蚀后期，Al(OH)3转变为Al2O3，AlO2?与Fe3O4形成尖晶石FeAl2O4，结构较为致密，覆盖基体表面，阻碍了腐蚀介质与基体的接触，腐蚀速率降低。
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| 关 键 词： | 盐雾腐蚀 电化学腐蚀 腐蚀时间 硫代硫酸钠 Q345钢 |
| 收稿时间： | 2018/7/30 0:00:00 |
| 修稿时间： | 2018/11/20 0:00:00 |
Effect of Time on the Corrosion of Q345 Steel in Thiosulfate Sodium Aluminate Solution |
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| FU Hui,CHEN Chao-yi,LI Jun-qi,LAN Yuan-pei,ZHANG Xiang-qian and YUAN Jing-jiu.Effect of Time on the Corrosion of Q345 Steel in Thiosulfate Sodium Aluminate Solution[J].Surface Technology,2018,47(11):166-172. |
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| Authors: | FU Hui CHEN Chao-yi LI Jun-qi LAN Yuan-pei ZHANG Xiang-qian and YUAN Jing-jiu |
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| Affiliation: | 1.School of Material and Metallurgy, Guizhou University, Guiyang 550025, China; 2.Key Laboratory of Metallurgical Engineering and Process Energy Saving of Guizhou Province, Guiyang 550025, China,1.School of Material and Metallurgy, Guizhou University, Guiyang 550025, China; 2.Key Laboratory of Metallurgical Engineering and Process Energy Saving of Guizhou Province, Guiyang 550025, China,1.School of Material and Metallurgy, Guizhou University, Guiyang 550025, China; 2.Key Laboratory of Metallurgical Engineering and Process Energy Saving of Guizhou Province, Guiyang 550025, China,1.School of Material and Metallurgy, Guizhou University, Guiyang 550025, China; 2.Key Laboratory of Metallurgical Engineering and Process Energy Saving of Guizhou Province, Guiyang 550025, China,1.School of Material and Metallurgy, Guizhou University, Guiyang 550025, China; 2.Key Laboratory of Metallurgical Engineering and Process Energy Saving of Guizhou Province, Guiyang 550025, China and 1.School of Material and Metallurgy, Guizhou University, Guiyang 550025, China; 2.Key Laboratory of Metallurgical Engineering and Process Energy Saving of Guizhou Province, Guiyang 550025, China |
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| Abstract: | |
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| Keywords: | salt spray corrosion electrochemical corrosion corrosion time sodium thiosulfate Q345 steel |
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