pH值对镁合金化学镀Ni-P合金的影响  

Effects of pH Value on Electroless Ni-P Plating on Magnesium Alloys

作　　者：徐加有[1] 吴连波[1] 张继红[1] 赵明慧 

机构地区：[1]长春工业大学材料科学与工程学院,吉林长春130012 [2]垒高汽车零部件有限公司,吉林长春130022

出　　处：《表面技术》2007年第1期65-67,共3页Surface Technology

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。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.

关 键 词：镁合金 化学镀镍 PH值 镀镍磷合金 

分 类 号：TG174[金属学及工艺—金属表面处理] TQ153.3[金属学及工艺—金属学]