【摘要】 为进一步确定pH值对镁合金化学镀Ni-P合金的影响,利用扫描电镜(SEM),能谱仪(XPS),显微硬度仪以及极化曲线等方法分析镀层的形貌和性能。结果表明:pH值对镀层的性能影响较大,pH值很低时难于施镀,形貌在pH值为8时最好,镀层的含磷量随着pH值的升高而降低;在一定范围内,硬度随着pH值的升高而降低;在pH值为4时,其镀层的自腐蚀电位最高达到-0.92V,耐腐蚀性能最好。更多还原

【Abstract】 To further determine the effects of the pH value on chemical plating Ni-P alloy on the magnesium alloys,the pattern and the performance of plating were analyzed using scanning electron microscope(SEM), energy spectrometer(XPS),microhardness device as well as polarization curve and so on.The result indicates that the pH value influences the coating performance greatly,as the pH value is very low,it is difficult to plate,the pattern is best when the pH value is 8,the content of phosphorus reduces with the increasing of pH value;in certain scope,hardness reduces with the increasing of the PH value;when the PH value is 4,the corrosion electric potential of plating is highest and gets to-0.92 V, the corrosion resistance is best.更多还原