化学镀(Ni-P)-WC纳米微粒复合镀层的研究

采用化学镀的方法制备(Ni-P)-WC纳米微粒复合镀层,研究了镀液中WC纳米微粒的添加量对镀层中微粒含量的影响,通过扫描电镜观察了(Ni-P)-WC纳米微粒复合镀层的表面形貌。研究发现,纳米微粒镀层的硬度随着镀层中WC纳米微粒含量的增加而提高。通过测量(Ni-P)-WC纳米微粒复合镀层在NaCl溶液中的开路电位曲线和电化学阻抗谱,发现其耐蚀性能要优于合金镀层。

Study on (Ni-P)-WC Nanoparticles Electroless Composite Coatings

(Ni-P)-WC nanoparticles composite coatings were prepared by electroless process in Ni-P plating solution containing WC nano-particles.The influences of the WC nano-particles concentration on the composition of the composite coatings were investigated.The surface morphologies of the Ni-P alloy and(Ni-P)-WC nanocomposite coating were observed using a scanning electron microscope(SEM).The microhardness of(Ni-P)-WC nanocomposite coatings increases with the increase in content of the WC nano-particles in the coatings.The corrosion behavior of Ni-P alloy coating and(Ni-P)-WC nanocomposite coatings was examined by open circuit potential curves and electrochemical impedance spectroscopy(EIS) in NaCl solution.It shows that(Ni-P)-WC nanocomposite coatings has better corrosion resistance than the Ni-P alloy coating.