机械研磨化学复合镀Ni-P-Al_2O_3工艺  

Technology of mechanical attrition and chemical composite plating with Ni-P-Al_2O_3

作　　者：李亚敏[1] 王丽波[1] 刘洪军[1] 

机构地区：[1]兰州理工大学有色金属合金及加工教育部重点实验室,甘肃兰州730050

出　　处：《兰州理工大学学报》2012年第3期13-17,共5页Journal of Lanzhou University of Technology

基　　金：甘肃省自然科学基金(2007GS04799)

摘　　要：采用机械研磨化学复合镀工艺在模具锌合金表面获得Ni-P-Al2O3复合镀层,研究镀液成分、纳米Al2O3加入量和工艺条件对镀速的影响.结果表明:硫酸镍、次亚磷酸钠和纳米Al2O3在镀液中的含量均存在极限值,超过极限值后镀速开始下降;在镀液不发生分解时,pH值和温度的提高使镀速迅速上升;机械研磨使镀速显著减小,但玻璃球直径大小对镀速影响不大.优化工艺条件下镀速可达12～13μm/h,在此工艺下获得的镀层硬度高、耐蚀性好.Depositional Ni-P-A1203 coatings was obtained on mould surface of zinc alloy by means of me- chanical attrition and chemical composite plating technique, and the effect of bath ingredients, nano Al203 addition content, and process conditions on the deposition rate was investigated. The result showed that the nickel sulfate, sodium hypophosphite and nano-Al2O3 content in the bath were limited and over the lim- iting value the plating rate began to decline. And the deposition rate increased rapidly with the bath tem- perature and pH value as there was no bath decomposition, but it reduced markedly due to mechanical at- trition. The size of the glass ball had less influence on it. The peak value of the deposition rate was 12-13μm/h in the optimized process condition, the new coating showed high hardness and good corrosion resist- ance.

关 键 词：机械研磨 化学复合镀 沉积速率 纳米AL2O3 模具锌合金 

分 类 号：TG174[金属学及工艺—金属表面处理]