纳米化学复合镀镍–磷–氧化铝工艺  

Electroless plating process of nickel–phosphorous– aluminum oxide nanocomposite

作　　者：金辉[1,2,3] 王一雍[1,3] 郎现瑞 南红玉 庄子栋 周立强[1] 

机构地区：[1]辽宁科技大学材料与冶金学院,辽宁鞍山114051 [2]沈阳工业大学材料科学与工程学院,辽宁沈阳110870 [3]辽宁科技大学激光先进制造技术研发中心,辽宁鞍山114051

出　　处：《电镀与涂饰》2014年第3期115-117,共3页Electroplating & Finishing

基　　金：高等学校博士学科点专项科研基金(20102120120001);辽宁科技大学科研专项基金资助项目(2012RC05)

摘　　要：通过正交试验对45钢上复合化学镀Ni–P–Al2O3的工艺条件进行优化,得到的最佳工艺条件为:NiSO4·7H2O 25 g/L,NaH2PO2·H2O 30 g/L,CH3COONa 15 g/L,NaF 0.4 g/L,乳酸20 mL/L,硫脲20 mg/L,十二烷基磺酸钠0.1 g/L,纳米α-Al2O35 g/L,温度90°C,pH 4.8,时间2 h,转速300 r/min。分别采用扫描电镜、能谱仪、维氏硬度仪和电化学工作站对镀层的微观形貌、组成、显微硬度以及耐蚀性进行表征。在最优工艺下制备的Ni–P–Al2O3复合镀层,Al2O3微粒分布均匀,结构致密,显微硬度为204 HV,耐蚀性均优于Ni–P镀层。The process conditions of electroless Ni-P-Al2O3 composite plating on 45 steel were optimized through orthogonal test. The optimal process conditions are as follows： NiSO4＂7H20 25 g/L, NaHEPOE＇H20 30 g/L, CH3COONa 15 g/L, NaF 0.4 g/L, lactic acid 20 mL/L, thiourea 20 mg/L, sodium dodecyl sulfate 0.1 g/L,α-Al2O3 nanoparticle 5 g/L, temperature 90 ℃, pH 4.8, rotation speed 300 r/min, and time 2 h. The micromorphology, composition, microhardness, and corrosion resistance of Ni-P-A1203 composite coating were characterized using scanning electron microscope, energy-dispersive spectroscope, Vikers hardness tester, and electrochemical workstation. The Ni-P-A1203 composite coating prepared under the optimal process conditions futures uniform distribution of A1203 particles and compact structure, and has a microhardness of 204 HV and better corrosion resistance than that of NiP coating.

关 键 词：镍—磷合金 氧化铝 化学复合镀 显微硬度 耐蚀性 

分 类 号：TQ153.2[化学工程—电化学工业]