亚硫酸盐-硫代硫酸盐置换镀金液对Ni^(2+)耐受能力的研究  

Study of Tolerance Capability of Ni^(2+) in Sulfite-Thiosulfate Immersion Gold Plating Bath

作　　者：谭谦[1] 李宁[1] 刘海萍[1] 

机构地区：[1]哈尔滨工业大学应用化学系,黑龙江哈尔滨150001

出　　处：《电镀与环保》2007年第5期16-19,共4页Electroplating & Pollution Control

摘　　要：在亚硫酸金钠为主盐,亚硫酸盐-硫代硫酸盐为配位剂的无氰置换镀金液中,逐步加入NiSO4来模拟镀液的老化。研究该镀金液对Ni2+的耐受能力。结果表明:该置换镀金液中Ni2+的最高质量浓度为1.0 g/L。当Ni2+的质量浓度超过1.0 g/L时,金层外观明显变差,出现部分发灰现象。添加适量的金属屏蔽剂2-巯基苯并噻唑(2-MBT)或苯并三氮唑(BTA)可使镀金层外观得到一定改善,灰斑面积减少,但仍不能完全消除,还有待进一步研究。An immersion gold plating bath using Na3 Au（ SO3 ） 2 as gold source and sulfite - thiosulfate as complexing agents is studied. NiSO4 is added to the plating bath to simulate aging of the bath and the tolerance capability of Ni^2＋ in this bath is studied. Results show that the maximum mass concentration of Ni^2＋ in this immersion gold bath is 1.0 g/L. When the mass concentration of Ni^2＋ exceeds 1.0 g/L, the appearance of gold coating will deteriorate observably, and will turn gray and non-uniform. The addition of adequate metallic shielding agent such as 2 - mercaptobenzothiazole （2 - MBT） or benzotriazole （BTA） can improve the appearance of gold coating to a certain extent, but not perfectly,

关 键 词：无氰 置换镀金 Ni^2+耐受能力 金属屏蔽剂 

分 类 号：TQ153[化学工程—电化学工业]