镁合金化学镀镍层在智能纳米容器控制下的自修复性能研究

项目名称： 镁合金化学镀镍层在智能纳米容器控制下的自修复性能研究

项目编号： No.51501157

项目类型： 青年科学基金项目

立项/批准年度： 2016

项目学科： 一般工业技术

项目作者： 谢治辉

作者单位： 西华师范大学

项目金额： 20万元

中文摘要： 化学镀镍具有均镀能力强、操作简单等优点，在镁合金的表面处理领域所具有的广泛应用前景更是吸引了大量的研究关注。然而，单一的镁合金化学镍基镀层的耐蚀性能难以与传统的镀铬层媲美，这大大限制了镁合金和化学镀镍技术的应用和发展。针对镁合金化学镀镍的上述瓶颈，为了进一步提升其耐腐蚀性能，本项目以纳米技术为切入点，先合成核-壳结构的纳米容器（CI@NCs），再使其与Ni在镁合金表面进行共沉积，获得具有自修复功能的镁合金化学镀镍层。纳米容器的“核”为负载镁合金缓蚀剂（CI）的介孔SiO2纳米粒子，“壳”为可对pH值变化做出响应的聚合物电解质膜。项目主要研究CI@NCs的制备方法、CI的可控制释放过程、CI@NCs与Ni的共沉积原理和含CI@NCs化学镍镀层的自修复机理。本项目的实施，有助于拓展纳米容器的应用范围，获得一种兼具传统化学镀镍层和缓蚀剂双重功能的智能镁合金化学镀镍层。

中文关键词： 镁合金；化学镀镍；纳米容器；自修复；缓蚀剂

英文摘要： Electroless nickel plating (ENP) have attracted tremendous attention and emerged as a functional coating for surface treatment of magnesium (Mg) alloys due to its excellent throwing power, simplicity in operation, etc. Unfortunately, the corrosion resistance of the mono-ENP coating on Mg alloys is unacceptable in comparison with conventional chrome plating coating, which greatly limits the application and development of ENP technique and Mg alloys. To overcome the disadvantage above and further enhance the corrosion resistance of ENP coating on Mg alloys, motivated by nanotechnology, in this proposal, core-shell structure nanocontainers (CI@NCs) of mesoporous SiO2 nanoparticles loaded with Mg alloy corrosion inhibitor (CI) as the core and pH-responsive polyelectrolyte layers assembled layer-by-layer as the shell are produced, and co-deposited with Ni on the surface of Mg alloy from ENP bath to obtain a self-healing ENP coating incorporated with CI@NCs. The fabrication method of CI@NCs, the controlled release of CI, the co-deposition of CI@NCs and Ni as well as the self-healing mechanism of the ENP coating containing CI@NCs are mainly investigated in the present proposal. The implement of the present proposal is not only expand the scope of the nanocontainors, but also get a smart ENP coating with dual-function of both traditional ENP coating and CI.

英文关键词： Magnesium alloy;Electroless nickel plating;Nanocontainers;Self-healing;Corrosion inhibitor