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Corrosion Resistance of Waterborne Epoxy Resin Coating Cross-Linked by Modified Tetrabutyl Titanate
Scanning Pub Date : 2020-10-03 , DOI: 10.1155/2020/1392385
Lingli Xu 1 , Zheng Chen 1 , Fei Huang 1 , Yinze Zuo 1 , Xingling Shi 1, 2, 3 , Xiaowei Zhou 1
Affiliation  

The development of waterborne coating is essentially important for environmental protection, and cross-linking agent is of great significance for ensuring corrosion resistance of the coating. In this work, tetrabutyl titanate was modified by ethylene glycol and tris(2-hydroxyethyl) amine and used for the solidification of waterborne acrylic-epoxy resin. Fourier-transform infrared spectroscopy (FTIR) analysis revealed that the agent reacted with OH groups first to cross-link the resin preliminarily, and then, when the amount of agent was further increased, the amino groups opened epoxide rings resulting in a secondary cross-link. Field emission scanning electron microscope (FESEM) observation and electrochemical impedance spectroscopy (EIS) test found that, when the cross-linking agent was used at 6%, the coating remains intact and kept an impedance of as high as 108Ωcm2 even after being immersed in NaCl solution for 30 days. Copper-accelerated acetic acid-salt spray (CASS) test confirmed that the coating containing 6% cross-linking agent provided the best protection for the carbon steel substrate.

中文翻译:

改性钛酸四丁酯交联水性环氧树脂涂料的耐腐蚀性能

水性涂​​料的发展对环境保护具有重要意义,而交联剂对于保证涂料的耐腐蚀性能具有重要意义。在这项工作中,钛酸四丁酯用乙二醇和三(2-羟乙基)胺改性,用于水性丙烯酸环氧树脂的固化。傅里叶变换红外光谱 (FTIR) 分析表明,该试剂首先与 OH 基团反应使树脂发生初步交联,然后,当试剂量进一步增加时,氨基打开环氧化物环,产生二次交联。关联。场发射扫描电子显微镜(FESEM)观察和电化学阻抗谱(EIS)测试发现,当交联剂用量为6%时,即使在 NaCl 溶液中浸泡 30 天,涂层仍保持完整并保持高达 108Ωcm2 的阻抗。铜加速醋酸盐雾(CASS)试验证实,含6%交联剂的涂层为碳钢基材提供了最好的保护。
更新日期:2020-10-03
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