压铸镁合金化学镀Ni-P的沉积过程  

Deposit Process of Electroless Ni-P on Die Casting Magnesium Alloys

作　　者：毕虎才[1] 卫英慧[1] 侯利锋[1] 余春燕[1] 胡兰青[1] 许并社[1] 

机构地区：[1]太原理工大学材料科学系,山西太原030024

出　　处：《稀有金属材料与工程》2006年第10期1661-1664,共4页Rare Metal Materials and Engineering

基　　金：国家自然科学基金(504710707);山西省青年科学基金(20041023)项目资助

摘　　要：通过扫描电镜和GDA辉光放电光谱分析仪等手段,研究了压铸镁合金化学镀Ni-P的沉积过程,结果表明镁合金化学镀的前处理使基材表面呈现孔洞结构,活化形成比较平整的疏松网孔状MgF2和AlF3层;镁合金化学镀Ni-P的初始沉积过程,首先是Ni的还原析出,并不含P;随着Ni形核数量的增多和长大,有自催化能力的Ni层产生,镍磷共沉积开始;镀层中存在铬化物、氟化物与镀液成分以及Ni的混杂层。This paper studied the deposit process of electroless Ni-P on die casting magnesium alloys using SEM and GDA spectrum analysis instrument etc. The results indicated that pre-treatment made magnesium alloys surface netted-porous, loose MgF2 and AIF3 layer formed after activation process. The initial deposit process of electroless Ni-P was precipitation of Ni without P atom, followed by Ni nucleating and growing up, the Ni of self-catalysis formed, the nickel phosphorus began to co-deposit. There exited mixing layer composed of complex compound, fluoride, plating liquid and Ni in the initial deposit coating.

关 键 词：镁合金 化学镀镍磷 沉积 

分 类 号：TQ153[化学工程—电化学工业]