Abstract: Vinyl versalate-10-silane acrylate emulsion was synthesized by introducing vinyl versatate-10(VV-10) and vinyltrimethoxy VTMS) as functional monomer. The composite coatings were prepared by adding inorganic nanomaterials such as SiO₂ and montmorillonite(MMT) into the modified emulsion. The influence of different emulsion and inorganic nanomaterial on water resistance and anticorrosive properties of emulsion coatings was testedvia contact angle, water absorption, electrochemica impedance spectroscopy(EIS), potentiodynamic polarization curves and salt spray test. The results indicated that the introduction of VV-10 and VTMS could improve the water resistance and anticorrosive properties of emulsion coatings. The addition of inorganic nanomaterials, especially MMT, could further improve the anticorrosive properties of composite coatings which showed water absorption 0.7%,corrosion current density 2.91×10^-9A/cm², electrochemical impedance up to 1.9×10⁸ Ω, and no corrosion diffusion phenomenon after 240 h salt spray test.

Key words: vinyl versatate-10, vinyltrimethoxysilane, acrylate emulsion, inorganic nanomaterials, anticorrosion

摘要： 利用叔碳酸乙烯酯和乙烯基三甲氧基硅烷为功能单体,合成叔碳酸乙烯酯-硅烷改性丙烯酸酯(叔硅丙)乳液,并添加纳米SiO₂和纳米蒙脱土等无机材料制备复合防腐蚀涂层。通过接触角、吸水率、电化学阻抗谱、极化曲线、盐雾试验等测试研究了乳液种类及无机纳米材料种类对涂层耐水性和防腐蚀性能的影响。结果表明,叔碳酸乙烯酯和乙烯基三甲氧基硅烷的引入可以有效提高涂层的耐水性和防腐蚀性能,无机纳米材料的加入,尤其是蒙脱土的加入可以进一步提高涂层的防腐蚀性能。复合涂层的吸水率仅为0.7%,腐蚀电流密度为2.91×10^-9A/cm²,电化学阻抗可达1.9×10⁸ Ω,盐雾试验240 h后无腐蚀扩散现象。

关键词: 叔碳酸乙烯酯, 乙烯基三甲氧基硅烷, 丙烯酸酯乳液, 无机纳米材料, 防腐蚀