Corrosion resistance of a self-healing multilayer film based on SiO^sub 2^ and CeO^sub 2^ nanoparticles layer-by-layer assembly on Mg alloys

A multilayer coating with dense and smooth microstructure was successfully constructed on Mg alloys via a novel spin-spray layer-by-layer (SSLbL) assembly technique. As the useful building units, SiO2 nanoparticles could be used as a physical barrier to corrosive medium, and CeO2 nanoparticles were chosen to act as a corrosion inhibitor to heal the physical damage. Thus, the obtained coating possessed good corrosion resistance and self-healing performance, which would prolong the service life of Mg alloy implants.