碱金属阳离子对化学镀镍的影响  

Effects of alkali metal cations on electroless nickel plating

作　　者：胡光辉[1] 唐锋[1] 黄华娥[1] 潘湛昌[1] 魏志钢[1] 苏小辉[1] 

机构地区：[1]广东工业大学轻工化工学院,广东广州510006

出　　处：《电镀与涂饰》2011年第4期19-22,共4页Electroplating & Finishing

摘　　要：研究了碱金属阳离子(以柠檬酸盐的形式加入,浓度为0.143mol/L)对黄铜基体上化学镀层中镍磷含量、化学沉积速率、镀层耐硝酸腐蚀性能和镀层外观等的影响。镀液基础配方为:NiSO4·6H2O25g/L,NaH2PO2·H2O25g/L,甘氨酸1g/L,乙酸铵4.5g/L,乳酸1mL/L。结果表明:镀层中磷含量和耐硝酸腐蚀性能按Na+<K+<NH+4的顺序排列,化学沉积速率按Na+>K+>NH+4的顺序排列,配方2(K+)镀层易残留镀液,导致镀层氧化变色。The effects of alkali metal cations （dosed as citrates with a concentration of 0.143 mol/L） on phosphorus content,deposition rate,corrosion resistance to nitric acid and appearance of electroless Ni coating on brass substrate were studied with a bath containing NiSO4·6H2O 25 g/L,NaH2PO2·H2O 25 g/L,glycine 1 g/L,ammonium acetate 4.5 g/L,and lactic acid 1 mL/L.The results showed that the phosphorus content and corrosion resistance to nitric acid are in the following order：Na^＋ K^＋ NH4^＋.The deposition rate is in the order of Na^＋ K^＋ NH4^＋.The plating solution was found to easily remain on the coating produced by the formulation 2 （containing K^＋）,leading to oxidation discoloration of the coating.

关 键 词：化学镀镍 碱金属阳离子 沉积速率 耐硝酸腐蚀 

分 类 号：O646[理学—物理化学]