图是纳米颗粒中Al元素和纳米复合镀层中Al元素的XPS测试图谱，由图可知，相对于原始粉末中纳米Al2O3颗粒的Al2p电子结合能，镀层中纳米Al2O3颗粒的Al2p电子结合能负移了9eV，这说明复合镀层中纳米颗粒与基质金属之间存在化学键，而且纳米颗粒倾向得到电子。

The figure shows the XPS test spectra of Al elements in nanoparticles and Al elements in nanocomposite plating. From the figure, it can be seen that the Al2p electron binding energy of Al2O3 nanoparticles in the plating is negatively shifted by 9 eV relative to the Al2p electron binding energy of Al2O3 nanoparticles in the original powder, which indicates that there is a chemical bond between the nanoparticles and the base metal in the composite plating, and the nanoparticles tend to get electrons.