关于金属基板对涂层保护性能的影响的研究由EIS进行
Jiyun Gong1, Han Wei1, Pan Hao1
1Key Laboratory of Carbon Fiber and Functional Polymers, Ministry of Education, Beijing University of Chemical Technology, Beijing 100029, China.
Materials (Basel, Switzerland)
|January 23, 2024
概括
金属基板在盐水环境中显著影响红色氧化铁环氧涂层的性能. 碳钢失效速度最快,而合金由于基板特性和腐蚀产品相互作用,提供了最长的保护.
科学领域:
- 材料科学 材料科学 材料科学
- 腐蚀科学 腐蚀科学
- 电化学 电化学 电化学
背景情况:
- 保护性涂层对于金属的耐用性至关重要.
- 了解基板对涂层降解的影响对于材料选择和性能预测至关重要.
研究的目的:
- 对碳钢,黄铜和合金上红色氧化铁环氧涂层的降解进行比较研究.
- 分析金属基板在循环盐水暴露下对涂层保护性能的影响.
主要方法:
- 电化学阻抗光谱学 (EIS) 是一种电化学阻抗光谱技术.
- 福里埃变换红外光谱学 (FTIR) 技术
- 扫描电子显微镜 (SEM) 的使用
- 在X射线衍射 (XRD) 中.
主要成果:
- 涂层失效时间在基板之间差异很大:钢 (最短) <铜 <合金 (最长).
- 钢铁和黄铜上的松散,高度腐蚀产品促进了水的扩散.
- 合金的被动膜和盐膜形成表现出抑制腐蚀的效果.
结论:
- 金属基板的特性及其腐蚀产品极大地影响了环氧涂层的降解.
- 涂层性能评估指标,如0.01Hz,必须考虑基质特定的行为.
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