纳米Zr粒子改性环氧涂层的耐腐蚀性能

Investigation of Corrosion Resistance of Epoxy Coatings Modified with Zirconium Nanoparticles

使用纳米Zr粒子和环氧树脂制备出纳米复合环氧涂料,用透射电镜(TEM)、X射线衍射光谱(XRD)对纳米Zr粒子进行了表征,并测试了不同含量纳米Zr粒子涂层力学性能。根据盐雾试验和电化学阻抗谱(EIS)试验结果研究了纳米Zr粒子对涂层耐腐蚀性能的影响。结果表明,在10%纳米Zr粒子涂层中水的扩散系数为6.0×10-6cm2/s,比其它涂层降低了一个数量级。适量的惰性纳米Zr粒子在涂层中均匀分散产生的物理屏蔽作用,提高了涂层的耐腐蚀性能。

Nanocomposite epoxy coatings were prepared with Zr nanoparticles and resin. Zr nanoparticles was characterized using transmission electron microscopy （TEM） and X-ray diffraction spectroscopy （XRD）. Measurements of mechanical properties of coatings with different loading of nanoparticles were carried out. Effects of Zr nanoparticles on the coating corrosion resistance were investigated using salt spray tests and electrochemical impedance spectroscopy （EIS）. Results show that the diffusion coefficient of water in the coating with 10% Zr nanoparticles is 6.0×10.6 cm^2/s, and decreases an order of magnitude than that of other coatings. Z.r nanoparticles with appropriate loading dispersed homogeously in the coatings play a role of physical barrier, thus the corrosion resistance of the coatings is improved.