Regarding their higher wear/corrosion resistance than conventional coatings, nickelphosphorus based composite coatings can reduce components’ costs and degradation. This study employed laser surface modification of Ni-P-SiC electroless coatings deposited on Al356 substrate, followed by investigating their microstructural changes and corrosion behavior. The results showed that increasing the laser power increases surface defects and causes substrate diffusion to the coating, which significantly reduces the corrosion resistance of the coating. In contrast, low-power laser operations can improve the corrosion resistance of Ni-P-SiC composite coatings by creating stable nickel phosphide phases, more uniform element distribution, and enhanced SiC particle-substrate coherence. All these factors increase the wear and corrosion resistance simultaneously.

鉴于其比传统涂层更高的耐磨/耐腐蚀性，镍磷基复合涂层可以降低部件的成本和退化。本研究采用激光表面改性沉积在 Al356 基板上的 Ni-P-SiC 化学镀层，然后研究其微观结构变化和腐蚀行为。结果表明，增加激光功率会增加表面缺陷并导致基体向涂层扩散，从而显着降低涂层的耐腐蚀性能。相比之下，低功率激光操作可以通过产生稳定的磷化镍相、更均匀的元素分布和增强的 SiC 颗粒-基底相干性来提高 Ni-P-SiC 复合涂层的耐腐蚀性。所有这些因素同时提高了耐磨性和耐腐蚀性。