空气搅拌对n-Al_2O_3/Ni–P化学复合镀层性能的影响  

Influence of gas stirring on properties of nanoAl_2O_3/Ni–P electroless composite plating

作　　者：刘菲菲[1] 黄燕滨[1] 赵艺伟[1] 

机构地区：[1]装甲兵工程学院装备再制造工程系,北京100072

出　　处：《电镀与涂饰》2007年第4期5-7,14,共4页Electroplating & Finishing

摘　　要：针对纳米化学复合镀施镀过程中纳米颗粒分散问题,设计并研制了可控制空气流量的搅拌装置,研究了空气搅拌强度对n-Al2O3/Ni–P化学复合镀层性能的影响。结果表明,空气搅拌强化了纳米颗粒在镀层中的分散。搅拌强度为80L/h时,纳米化学复合镀层最致密,为典型的胞状结构,镀层中纳米Al2O3含量达到1.13%,镀层硬度可达628HV,镀层孔隙率等级为9级。极化曲线显示,纳米化学复合镀层的自腐蚀电流(9.963μA/cm2)远远小于Ni–P镀层,具有更优异的耐蚀性。The equipment of controllable air flow-rate was designed and fabricated in order to better the dispersion effect of nano-particles in the process of electroless composite plating. The influence of air stirring intensity on properties of nano-Al2O3/Ni-P electroless composite plating was studied by means-of changing air flow-rate. The results show that the dispersion effect of nano-particles in the composite deposit gets better by using air stirring. When the air stirring speed is 80 L/h, the nano-composite plating has a typical cystiform structure with good adhesion, the content of nano-Al2O3 particles in composite deposit is 1.13%, the hardness is 628 HV and the porosity rate of composite deposit is ranked class 9. The potentiodynamic polarization test reveals a far lower corrosion current （9.963 μA/cm^2） and hence a better corrosion resistance of the nano-composite deposit than that of Ni-P coating.

关 键 词：空气搅拌 纳米颗粒 化学复合镀层 孔隙率 硬度 

分 类 号：TQ153[化学工程—电化学工业]