摘要
以聚丙烯酰胺凝胶法制备了纳米ZnO,并对其进行改性,得到了环氧/纳米ZnO复合涂层。采用XRD和SEM对环氧/纳米ZnO复合涂层进行了表征。通过极化曲线和交流阻抗研究了裸基、复合涂层以及经锡酸盐转化处理后涂覆环氧/纳米ZnO的复合涂层的耐蚀性能。结果表明:复合涂层呈明显的两相结构,纳米ZnO分布均匀;复合涂层和锡酸盐转化协同,提高了镁锂合金的耐腐蚀性能。涂层中纳米ZnO质量分数不同,对镁锂合金耐蚀性能有不同的影响。纳米ZnO质量分数为2%时,复合涂层对镁锂合金的保护作用最强。
The epoxy/nano-ZnO composite coating was prepared by modification of nano-ZnO synthesized using polyacrylamide gel method. The epoxy/nano-ZnO composite coating was characterized by XRD and SEM, and the corrosion resistance of bare substrate, composite coating and epoxy/ nano-ZnO coating after stannate conversion treatment was studied by polarization curves and electrochemical impedance spectroscopy. The results showed that the composite coating displayed a two-phase structure, and ZnO particles were distributed homogeneously in the composite coating; composite coating in conjunction with stannate conversion improved the corrosion resistance of Mg-Li alloy. The mass fraction of nano-ZnO affects the corrosion resistance of Mg-Li alloy. The composite coating has the strongest protective effect on Mg-Li alloy with 2% nano-ZnO.
出处
《电镀与涂饰》
CAS
CSCD
2008年第8期48-50,54,共4页
Electroplating & Finishing
基金
国家自然科学基金资助项目(50603003)
关键词
镁锂合金
纳米氧化锌
环氧
复合涂层
耐蚀性
magnesium-lithium alloy
nano-zinc oxide
epoxy
composite coating
corrosion resistance
