有机微球填充水性环氧涂层的制备及其防腐性能

doi:10.11901/1005.3093.2016.215

材料研究学报

2017, Vol. 31

Issue (1): 1-8 DOI: 10.11901/1005.3093.2016.215

本期目录 | 过刊浏览

有机微球填充水性环氧涂层的制备及其防腐性能

王娜(

),张义男,栾鸿赫,张静

沈阳化工大学材料科学与工程学院沈阳 110142

Preparation and Anti-corrosion Properties of Waterborne Epoxy Coatings Containing Organic Microspheres

Na WANG(

),Yinan ZHANG,Honghe LUAN,Jing ZHANG

School of Materials Science and Engineering, Shenyang University of Chemical Technology, Shenyang 110142, China

引用本文:

王娜,张义男,栾鸿赫,张静. 有机微球填充水性环氧涂层的制备及其防腐性能[J]. 材料研究学报, 2017, 31(1): 1-8.
Na WANG, Yinan ZHANG, Honghe LUAN, Jing ZHANG. Preparation and Anti-corrosion Properties of Waterborne Epoxy Coatings Containing Organic Microspheres[J]. Chinese Journal of Materials Research, 2017, 31(1): 1-8.

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摘要:

用无皂乳液聚合法制备单分散的聚甲基丙烯酸甲酯(PMMA)和聚苯乙烯(PS)微球, 将其添加到水性环氧树脂中制备出有机微球/水性环氧复合涂料, 然后用空气喷涂法在钢片表面制备出复合涂层。用动态光散射(DLS)和扫描电子显微镜(SEM)对制备的有机微球进行了表征, 用电化学测试(EIS)、盐雾测试和附着力测试等手段研究了不同颜基比(颜料和树脂的质量比: P/B)的有机微球/水性环氧复合涂层的耐蚀性。结果表明, 两种有机微球的粒径均一且具有高度的单分散性, 颜基比P/B=0.007的PS/水性环氧复合涂层具有最佳电化学、耐盐雾和附着力性能。复合涂层的抗介质渗透能力明显优于清漆涂层, 因为有机微球独特的表面效应提高了涂层的致密性。

关键词 ：材料失效与保护, 水性环氧树脂, 有机微球, 电化学阻抗谱, 防腐

Abstract：

Mono-dispersed organic microspheres of polymethyl methacrylate (PMMA) and polystyrene (PS) were prepared via soap-free emulsion polymerization, and which then were blended with waterborne epoxy resin to prepared composite paint of organic microspheres / waterborne epoxy composite. Finally the composite coating was applied on the surface of steel sheet by air spraying method. The organic microspheres were characterized by dynamic light scattering (DLS) and scanning electron microscope (SEM). The anti-corrosion property of the composite coatings with different P/B ratio (the ratio of pigment to base material) was investigated by electrochemical impedance spectroscopy (EIS)、salt spray test and adhesion test. The results show that the coatings with P/B=0.007 has the best performance in anti-corrosion to salt spray and adhesion to the substrate. The composite coating has better corrosion resistance than that of the coating of blank waterborne epoxy resin because of that the addition of organic microspheres can enhance the denseness of the coatings.

Key words： materials failure and protection waterborne epoxy resin organic microsphere electrochemical impedance spectroscopy( EIS ) anti-corrosion

收稿日期: 2016-04-19

基金资助:辽宁省自然科学基金(2015021016),沈阳市科技局国际合作项目(F15-200-6-01)和辽宁省百千万人才工程

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https://www.cjmr.org/CN/10.11901/1005.3093.2016.215 或 https://www.cjmr.org/CN/Y2017/V31/I1/1

图1 涂层附着力测试原理图

图2 PMMA微球和PS微球的SEM图像

图3 PMMA微球和PS微球的粒径分布

图4 水性环氧清漆涂层的奈奎斯特图

图5 等效电路图

图6 PMMA/水性环氧复合涂层的奈奎斯特图

图7 PS/水性环氧复合涂层的奈奎斯特图

图8 涂层阻抗值随时间的变化

图9 有机微球/水性环氧复合涂层的相互作用机理

图10 涂层防腐机理

图11 涂层在600 h盐雾试验后的照片

表1 几种不同质量分数涂层的附着力测试数据

图12 填充环氧树脂涂层断裂宏观形貌

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