| 亚硫酸盐-硫代硫酸盐置换镀金液对Ni2+耐受能力的研究 |
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| 引用本文： | 谭谦,李宁,刘海萍.亚硫酸盐-硫代硫酸盐置换镀金液对Ni2+耐受能力的研究[J].电镀与环保,2007,27(5):16-19. |
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| 作者姓名： | 谭谦 李宁 刘海萍 |
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| 作者单位： | 哈尔滨工业大学,应用化学系,黑龙江,哈尔滨,150001 |
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| 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.
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| 关 键 词： | 无氰 置换镀金 Ni2 耐受能力 金属屏蔽剂 |
| 文章编号： | 1000-4742（2007）05-0016-03 |
| 修稿时间： | 2007-03-14 |
Study of Tolerance Capability of Ni2+ in Sulfite -Thiosulfate Immersion Gold Plating Bath |
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| TAN Qian,LI Ning,LIU Hai-ping.Study of Tolerance Capability of Ni2+ in Sulfite -Thiosulfate Immersion Gold Plating Bath[J].Electroplating & Pollution Control,2007,27(5):16-19. |
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| Authors: | TAN Qian LI Ning LIU Hai-ping |
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| Affiliation: | Department of Applied Chemistry, Harbin Institute of Technology, Harbin 150001, China |
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| Abstract: | An immersion gold plating bath using Na_3Au(SO_3)_2 as gold source and sulfite-thiosulfate as complexing agents is studied.NiSO_4 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. |
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| Keywords: | non-cyanide immersion gold plating tolerance capability of Ni~(2 ) metallic shielding agent |
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