作　　者： ; ; ; (俞志东）;

机构地区： 广东石油化工学院

出　　处： 《电镀与涂饰》 2013年第1期72-75,共4页

摘　　要： 以水滑石作为储存缓蚀剂Zn2+、MoO42-的纳米容器,制备了MoO42-柱撑Zn/Al纳米水滑石(Zn/Al-MoO42-)。利用X射线衍射仪(XRD)、透射电子显微镜(TEM)、等离子体电感耦合光谱仪(ICP)和N2吸附脱附等温线对样品进行表征,采用动电位极化曲线(LP)和电化学阻抗谱(EIS)测试该纳米容器对AZ31镁合金的腐蚀防护效果。结果表明,所合成的Zn/Al-MoO42-水滑石纳米容器具有完整的层状结构,结晶良好,粒径尺寸在80nm左右,层板间距0.762nm,最可几孔径为38nm,为介孔材料,而且它可根据Cl的浓度差异发生不同程度的离子交换,具有良好的离子交换性能。将其作为颜料添加到环氧树脂中,并于镁合金表面固化成膜,所得的环氧涂层体系在质量分数为3.5%的NaCl溶液中浸泡70d后,仍具有较好的耐腐蚀性能。 A MoO4^2- pillared Zn/Al nano-hydrotalcite （Zn/Al-MoO4^2-） was prepared with hydrotalcite as a nano-container to load Zn^2＋ and MoO4^2- corrosion inhibitors, and then characterized by X-ray diffraction （XRD）, transmission electron microscopy （TEM）, inductively coupled plasma （ICP）, and N2 adsorption- desorption isotherm, respectively. The anticorrosion effect of the nano-container on AZ31 magnesium alloy was studied by potentiodynamic polarization curve （LP） and electro- chemical impedance spectroscopy （EIS）. The results showed that the synthesized Zn/A1-MoO24- hydrotalcite nano- container has good lamellar structure and is well-crystallized with a particle size of 80 nm, 0.762 nm interlayer spacing,and a most probable pore diameter of 38 nm, implying a mesoporous material. It has good ion-exchange performance as shown by different degrees of ion-exchange based on concentration difference of Cl^-. The epoxy coating on AZ31 magnesium alloy which contains the Zn/Al-MoO4^2- hydrotalcite nano-container as pigment maintains good corrosion resistance after immersion in 3.5wt% NaCl solution for 70 d.

关 键 词： 镁合金 防腐 锌离子 钼酸盐 缓蚀剂 水滑石 纳米容器 环氧涂层

领　　域： [金属学及工艺] [金属学及工艺] [一般工业技术]