两种环氧涂料在失效过程中的电化学行为及寿命预测
发布时间：2021-04-16 16:31
有机涂层是一种简单、有效和经济的抑制金属腐蚀的方法。然而,暴露在腐蚀性环境中的涂层会发生降解,尤其是在像海水等侵蚀性溶液中。由于有机涂层的失效周期长,所以研究其失效过程并预测涂层使用寿命显得十分重要。本文在2024-T3铝合金表面涂覆了 H900和ED1000两种环氧树脂涂层。H900环氧涂层的厚度包括四种,分别为35 μm、75 μm、130 μm和245 μm,ED1000环氧涂层的厚度包括两种,分别为35 μm和75μm。采用电化学交流阻抗（EIS）技术研究了铝合金/环氧涂层在3.5 wt.%NaCl溶液中的失效过程与行为。使用ZSimpWin软件分析EIS数据以获得涂层样品的电化学参数。采用傅里叶变换红外光谱技术（FTIR）研究了涂层中化学成分的变化,使用扫描电子显微镜（SEM）研究涂层和基体的微观形貌,并用能谱（EDS）分析了涂层或基体表面的元素组成。采用Corrosion Master模拟软件预测了模拟海水溶液中两种环氧涂层的服役寿命。得到如下主要结论:（1）ED1000环氧涂层和H900环氧涂层两种薄涂层（厚度为35 u m）,在很长一段时间内（至少700 d）对3.5 ...
【文章来源】：北京化工大学北京市 211工程院校 教育部直属院校
【文章页数】：107 页
【学位级别】：硕士
【文章目录】：
学位论文数据集
ABSTRACT
摘要
Chapter 1 Introduction
1.1 Background
1.2 Mechanism of anticorrosive coatings
1.2.1 Protective mechanism of anti-corrosion coatings
1.2.2 Failure mechanisms of anti-corrosion coatings
1.3 Coatings for aluminum alloy
1.3.1 Research background
1.3.2 Selection of different anti corrosive coatings
1.4 Coating failure detection methods
1.4.1 Conventional detection methods
1.4.2 Electrochemical methods
1.4.3 Spectroscopy methods
1.4.4 Coating service life prediction
1.5 The significance and main contents of this thesis
1.5.1 The significance of this thesis
1.5.2 Main contents of the thesis
Chapter 2 Experimental methods
2.1 Substrate and coatings
2.2 Preparation of samples
2.3 Experimental conditions
2.4 Corrosion performance test
2.4.1 Electrochemical impedance test
2.4.2 SEM observation of coating and substrate
2.4.3 Infrared testing of coatings
2.5 Pearson correlation analysis
Chapter 3 Degradation of ED1000 epoxy coating on AI alloy
3.1 EIS results of ED 1000 epoxy coating in 3.5 wt.%NaCl solution
3.1.1 EIS results of ED 1000 epoxy coating （35 μm） in 3.5 wt.%NaCl solution
3.1.2 Equivalent electric circuit fitting of ED 1000 epoxy coating sample （35 μm）
3.1.3 FTIR, SEM and EDS results of ED1000 epoxy coating sample （35 μm）
3.2 EIS results of ED 1000 epoxy coating （75 μm）
3.2.1 Equivalent circuit fitting results of ED1000 epoxy coating sample （75 μm）
3.2.2 FTIR and SEM analysis results of the ED1000 epoxy coating （75 μm）
3.3 EIS results of ED 1000 epoxy coating sample （75 μm） under condition of heatcycling
3.3.1 Fitting results of ED 1000 epoxy coating sample （75 μm） under heat cycling condition
3.3.2 FTIR and SEM analyses of ED 1000 epoxy coating （75 μm） under heat cyclingcondition
3.4 Comparison of impedance parameters of ED 1000 epoxy coating with twothicknesses
0.01Hz by Pearson" s="" correlationcoefficient'=""> 3.5 Study on the correlation between phase angle and |Z|0.01Hz by Pearson's correlationcoefficient
3.6 Conclusion of this chapter
Chapter 4 Degradation of H900 epoxy coating on Al alloy
4.1 EIS results of H900 epoxy coating sample （35μm） in 3.5 wt.%NaCl solution
4.1.1 Electric equivalent circuits fitting of H900 epoxy coating sample （35 μm）
4.1.2 FTIR, SEM and EDS results of H900 epoxy coating sample （35 μm）
4.2 EIS plots of H900 epoxy coating sample （75 μm）
4.2.1 Equivalent circuit fitting results of H900 epoxy coating sample （75 μm）
4.2.2 FTIR and SEM results of H900 epoxy coating （75 μm）
4.3 EIS plots of H900 epoxy coating sample （130 μm）
4.3.1 Electric Equivalent circuit results of H900 epoxy coating（130 μm）
4.3.2 FT-IR and SEM analysis of H900 130 μm epoxy coating
4.4 EIS plots of H900 epoxy coating sample （245 μm）
4.4.1 Equivalent circuit fitting result of H900 epoxy coating sample （245 μm）
4.5 Comparison of the impedance parameters of H900 epoxy coating
4.6 EIS results of H900 epoxy coating （75 μm） under heat cycling condition
4.6.1 Electric Equivalent Circuits results of H900 epoxy coating sample （75 μm） underheat cycling condition
4.6.2 FTIR and SEM of the H900 epoxy coating （75 μm） under heat cycling condition
4.7 EIS results of H900 epoxy coating（130 μm） under heat cycling condition
4.7.1 Fitting results of H900 epoxy coating（130 μm） under heat cycling condition
4.7.2 Scanning Electron Microscopy （SEM） and EDS of H900 epoxy coating（130 μm）under heat cycling condition
4.8 EIS results of H900 epoxy coating （245 μm） under heat cycling condition
4.8.1 Fitting parameters H900 epoxy coating （245 μm） under heat cycling condition
4.8.2 FTIR and SEM result of H900 epoxy coating 245 μm under heat cycling condition
4.9 Comparison of impedance characteristics of ED 1000 epoxy coating and H900epoxy coating
0.01Hz by Pearson" s="" correlationcoefficient'=""> 4.10 Study on the correlation between phase angle and |Z|0.01Hz by Pearson's correlationcoefficient
4.11 Conclusion of this chapter
Chapter 5 Service life prediction of epoxy coatings
5.1 Parameters used for numerical simulation
5.1.1 Experimental materials
5.1.2 EIS data of low frequency impedance
5.1.3 Potentiodynamic polarization curve of Al alloy
5.1.4 Sample used for simulation
5.1.5 Surface photographs of H900 epoxy coating
5.2 Simulation parameters
5.2.1 Comparison of experimental test results with predicted results
5.3 Conclusions of this chapter
Chapter 6 Conclusions
References
Acknowledgement
Introduction to Author & Supervisor
附件
本文编号：3141777
【文章来源】：北京化工大学北京市 211工程院校 教育部直属院校
【文章页数】：107 页
【学位级别】：硕士
【文章目录】：
学位论文数据集
ABSTRACT
摘要
Chapter 1 Introduction
1.1 Background
1.2 Mechanism of anticorrosive coatings
1.2.1 Protective mechanism of anti-corrosion coatings
1.2.2 Failure mechanisms of anti-corrosion coatings
1.3 Coatings for aluminum alloy
1.3.1 Research background
1.3.2 Selection of different anti corrosive coatings
1.4 Coating failure detection methods
1.4.1 Conventional detection methods
1.4.2 Electrochemical methods
1.4.3 Spectroscopy methods
1.4.4 Coating service life prediction
1.5 The significance and main contents of this thesis
1.5.1 The significance of this thesis
1.5.2 Main contents of the thesis
Chapter 2 Experimental methods
2.1 Substrate and coatings
2.2 Preparation of samples
2.3 Experimental conditions
2.4 Corrosion performance test
2.4.1 Electrochemical impedance test
2.4.2 SEM observation of coating and substrate
2.4.3 Infrared testing of coatings
2.5 Pearson correlation analysis
Chapter 3 Degradation of ED1000 epoxy coating on AI alloy
3.1 EIS results of ED 1000 epoxy coating in 3.5 wt.%NaCl solution
3.1.1 EIS results of ED 1000 epoxy coating （35 μm） in 3.5 wt.%NaCl solution
3.1.2 Equivalent electric circuit fitting of ED 1000 epoxy coating sample （35 μm）
3.1.3 FTIR, SEM and EDS results of ED1000 epoxy coating sample （35 μm）
3.2 EIS results of ED 1000 epoxy coating （75 μm）
3.2.1 Equivalent circuit fitting results of ED1000 epoxy coating sample （75 μm）
3.2.2 FTIR and SEM analysis results of the ED1000 epoxy coating （75 μm）
3.3 EIS results of ED 1000 epoxy coating sample （75 μm） under condition of heatcycling
3.3.1 Fitting results of ED 1000 epoxy coating sample （75 μm） under heat cycling condition
3.3.2 FTIR and SEM analyses of ED 1000 epoxy coating （75 μm） under heat cyclingcondition
3.4 Comparison of impedance parameters of ED 1000 epoxy coating with twothicknesses
0.01Hz by Pearson" s="" correlationcoefficient'=""> 3.5 Study on the correlation between phase angle and |Z|0.01Hz by Pearson's correlationcoefficient
3.6 Conclusion of this chapter
Chapter 4 Degradation of H900 epoxy coating on Al alloy
4.1 EIS results of H900 epoxy coating sample （35μm） in 3.5 wt.%NaCl solution
4.1.1 Electric equivalent circuits fitting of H900 epoxy coating sample （35 μm）
4.1.2 FTIR, SEM and EDS results of H900 epoxy coating sample （35 μm）
4.2 EIS plots of H900 epoxy coating sample （75 μm）
4.2.1 Equivalent circuit fitting results of H900 epoxy coating sample （75 μm）
4.2.2 FTIR and SEM results of H900 epoxy coating （75 μm）
4.3 EIS plots of H900 epoxy coating sample （130 μm）
4.3.1 Electric Equivalent circuit results of H900 epoxy coating（130 μm）
4.3.2 FT-IR and SEM analysis of H900 130 μm epoxy coating
4.4 EIS plots of H900 epoxy coating sample （245 μm）
4.4.1 Equivalent circuit fitting result of H900 epoxy coating sample （245 μm）
4.5 Comparison of the impedance parameters of H900 epoxy coating
4.6 EIS results of H900 epoxy coating （75 μm） under heat cycling condition
4.6.1 Electric Equivalent Circuits results of H900 epoxy coating sample （75 μm） underheat cycling condition
4.6.2 FTIR and SEM of the H900 epoxy coating （75 μm） under heat cycling condition
4.7 EIS results of H900 epoxy coating（130 μm） under heat cycling condition
4.7.1 Fitting results of H900 epoxy coating（130 μm） under heat cycling condition
4.7.2 Scanning Electron Microscopy （SEM） and EDS of H900 epoxy coating（130 μm）under heat cycling condition
4.8 EIS results of H900 epoxy coating （245 μm） under heat cycling condition
4.8.1 Fitting parameters H900 epoxy coating （245 μm） under heat cycling condition
4.8.2 FTIR and SEM result of H900 epoxy coating 245 μm under heat cycling condition
4.9 Comparison of impedance characteristics of ED 1000 epoxy coating and H900epoxy coating
0.01Hz by Pearson" s="" correlationcoefficient'=""> 4.10 Study on the correlation between phase angle and |Z|0.01Hz by Pearson's correlationcoefficient
4.11 Conclusion of this chapter
Chapter 5 Service life prediction of epoxy coatings
5.1 Parameters used for numerical simulation
5.1.1 Experimental materials
5.1.2 EIS data of low frequency impedance
5.1.3 Potentiodynamic polarization curve of Al alloy
5.1.4 Sample used for simulation
5.1.5 Surface photographs of H900 epoxy coating
5.2 Simulation parameters
5.2.1 Comparison of experimental test results with predicted results
5.3 Conclusions of this chapter
Chapter 6 Conclusions
References
Acknowledgement
Introduction to Author & Supervisor
附件
本文编号：3141777
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