| 张寒露,李自强,曹京宜,梁京龙,赵旭辉,唐聿明,左禹.环保型环氧涂层在盐雾中的劣化行为研究及不同性能参数间相关性初探[J].装备环境工程,2025,22(2):87-95. ZHANG Hanlu,LI Ziqiang,CAO Jingyi,LIANG Jinglong,ZHAO Xuhui,TANG Yuming,ZUO Yu.Degradation Behavior of Environmentally Friendly Epoxy Coatings in Salt Spray and Preliminary Study on the Correlation between Different Performance Parameters[J].Equipment Environmental Engineering,2025,22(2):87-95. |
| 环保型环氧涂层在盐雾中的劣化行为研究及不同性能参数间相关性初探 |
| Degradation Behavior of Environmentally Friendly Epoxy Coatings in Salt Spray and Preliminary Study on the Correlation between Different Performance Parameters |
| 投稿时间：2024-10-23 修订日期：2024-11-23 |
| DOI：10.7643/issn.1672-9242.2025.02.010 |
| 中文关键词: 水性环氧 溶剂型环氧 电化学阻抗 性能参数 相关性 性能评估中图分类号:TG174 文献标志码:A 文章编号:1672-9242(2025)02-0087-09 |
| 英文关键词:waterborne epoxy solvent-based epoxy EIS performance parameter correlation performance evaluation |
| 基金项目: |
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| Author | Institution |
| ZHANG Hanlu | Unit 92228, Chinese People's Liberation Army, Beijing 100072, China |
| LI Ziqiang | Key Laboratory of Carbon Fiber and Functional Polymer, Ministry of Education, Beijing University of Chemical Technology, Beijing 100029, China |
| CAO Jingyi | Unit 92228, Chinese People's Liberation Army, Beijing 100072, China |
| LIANG Jinglong | Key Laboratory of Carbon Fiber and Functional Polymer, Ministry of Education, Beijing University of Chemical Technology, Beijing 100029, China |
| ZHAO Xuhui | Key Laboratory of Carbon Fiber and Functional Polymer, Ministry of Education, Beijing University of Chemical Technology, Beijing 100029, China |
| TANG Yuming | Key Laboratory of Carbon Fiber and Functional Polymer, Ministry of Education, Beijing University of Chemical Technology, Beijing 100029, China |
| ZUO Yu | Key Laboratory of Carbon Fiber and Functional Polymer, Ministry of Education, Beijing University of Chemical Technology, Beijing 100029, China |
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| 中文摘要: |
| 目的 研究Q235碳钢/环保型环氧涂层在盐雾试验中的失效过程和电化学行为，探索主要性能参数之间的相关性。方法 采用电化学阻抗(EIS)和开路电位(OCP)，结合附着力测试、扫描电镜观察，研究水性环氧涂层和无溶剂型环氧涂层失效过程主要性能参数变化及其与涂层保护性能的关系，利用皮尔逊相关性数学方法探讨各参数之间的相关性。结果 当|Z|0.01 Hz降至1×107 Ω.cm2左右时，OCP快速下降，fb达到102 Hz，附着力衰减率接近30%，电镜下基体表面可观察到腐蚀产物。当|Z|0.01 Hz降至1×106 Ω.cm2附近时，OCP稳定在‒0.45 V(vs. SCE)附近，附着力衰减率接近45%，涂层出现锈点。低频阻抗|Z|0.01 Hz、OCP、附着力和特征频率fb四者之间均具有较强的相关性(相关系数r值为0.60~0.96)。结论 水性环氧涂层的吸水过程与溶剂型环氧涂层不同，不存在明显的吸水饱和平台。低频阻抗|Z|0.01 Hz、OCP、附着力和特征频率fb可以作为评价涂层保护性能的重要参数。 |
| 英文摘要: |
| The work aims to study the failure processes and electrochemical behaviors of environmentally friendly waterborne epoxy coatings on Q235 carbon steel in salt spray test and explore the correlation between the main performance parameters. The changes of main performance parameters during the failure process of waterborne epoxy coatings and solvent-free epoxy coatings and their relationship with the protective properties of coatings were studied by electrochemical impedance technique (EIS), open-circuit potential (OCP), adhesion test and scanning electron microscope (SEM) and the correlation between some performance parameters was studied by Pearson correlation mathematical method. When the low-frequency impedance modulus |Z|0.01 Hz dropped to about 1×107 Ω.cm2, the OCP decreased rapidly, the break point frequency fb reached 102 Hz, the decay ratio of the adhesionwas close to 30%. At this time, corrosion products were observed on the steel substrate surface underneath the coating by SEM. When the |Z|0.01 Hz decreased to around 1×106 Ω.cm2, the OCP stabilized close to −0.45 V (vs. SCE), the adhesion decayed close to 45%, and meanwhile small rust spots were observed on the coating. There were strong correlations (correlation factor r is 0.60~0.96) between the |Z|0.01 Hz, the OCP, the adhesion and the fb. The water absorption process of waterborne epoxy coatings is different from that of solvent-based epoxy coatings, and there is no obvious water absorption saturation platform. Low-frequency impedance |Z|0.01 Hz, OCP, adhesion and characteristic frequency fb can be used as important parameters to evaluate the protective properties of coatings. |
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