论文部分内容阅读
为进一步提升镁合金化学镀镍层的耐腐蚀性能,通过SEM、XRD、极化曲线和划线划格试验等方法研究纳米SiO_2粒子对化学镀镍层形貌、结合力及耐腐蚀能力的影响。结果发现:直接向镁合金化学镀镍液中添加纳米SiO_2会导致纳米粒子与氟发生反应而无法得到合格的镀层;通过二步法从不同镀液中得到的镀层相对于从同一镀液得到的镀层耐腐能力更强,当纳米粒子的质量浓度为5 g/L时复合镀层的耐腐蚀能力最强;XRD显示纳米粒子的复合没有改变镀层的非晶态结构。
In order to further improve the corrosion resistance of electroless Ni-P alloy, the effects of nano-SiO 2 particles on the morphology, adhesion and corrosion resistance of electroless Ni plating were investigated by means of SEM, XRD, polarization curves and scribing and scribing tests . The results showed that the direct addition of nano-SiO 2 to the electroless nickel plating solution of magnesium alloy resulted in the reaction between nano-particles and fluorine and failed to obtain acceptable coating. The two-step coating from different plating solution was more stable than that from the same plating solution The corrosion resistance of the coating is stronger. When the mass concentration of the nanoparticles is 5 g / L, the corrosion resistance of the composite coating is strongest. XRD shows that the composite of the nanoparticles does not change the amorphous structure of the coating.