硫酸盐光亮镀锡添加剂筛选及工艺优化研究

发布时间：2018-05-24 18:33

  本文选题：硫酸盐 + 光亮镀锡　； 参考：《昆明理工大学》2017年硕士论文

【摘要】：硫酸盐光亮镀锡工艺因镀层光亮、结晶细致、可焊性好,镀液成分简单,电流效率高,原料易得,操作工艺简单等诸多优点,广泛应用于电子、食品等工业,在国内外得到广泛的关注。我国对光亮镀锡添加剂的研究相对较晚,添加剂种类相对较少,导致镀锡溶液的许多问题还未得到解决,如电镀液不稳定、易浑浊,电镀工作温度区间较窄、添加剂毒性大等问题。因此,有必要开发新的硫酸盐光亮镀锡添加剂及其溶液,改善问题的同时促进镀锡液的国产化。本文通过Hull槽试验和镀液性能检测,确定了硫酸盐光亮镀锡添加剂的组分含量并优化了工艺条件,其最佳组分含量及工艺参数为:硫酸lOOmL/L、硫酸亚锡 30g/L、苄叉丙酮 0.lg/L、NP-10 2mL/L、OP-10 0.5mL/L、烟酸 0.3g/L、苯甲酸1.8 g/L、酒石酸钾钠0.8 g/L、酒石酸3 g/L、草酸3 g/L、抗坏血酸3 g/L、温度20℃、时间5min、电流密度1.5A/dm2。使用该配方及工艺条件获得的镀锡层在Hull槽试验下可以覆盖整个试件,镀层达到二级光亮,并且表面无国标中规定的缺陷。对镀液性能进行了测试,研究表明镀液综合性能良好:稳定性好,自然放置两个月以上不变质;分散能力高达88—94%;覆盖能力高达100%;电流效率接近100%;并且添加剂能增大阴极的极化作用。对镀层性能进行了测试,发现镀层与基体间的结合力和可焊性都比较好,两者均达到国家标准。SEM测试结果表明镀层全区平整、均匀,没有出现由于析氢产生条纹状从而造成镀层起伏不平、表面粗糙等问题,晶粒细小且密集。
[Abstract]:Because of the advantages of bright plating, fine crystallization, good solderability, simple composition of plating bath, high current efficiency, easy access to raw materials and simple operation process, sulfate bright tin plating process has been widely used in electronic, food and other industries. In the domestic and foreign widespread attention. The study of bright tin plating additives in China is relatively late and the kinds of additives are relatively few. Many problems of tin plating solution have not been solved, such as the instability of electroplating solution, the turbidity of electroplating solution, and the narrow working temperature range of electroplating. Additive toxicity and other problems. Therefore, it is necessary to develop new sulfate bright tin plating additives and their solution to improve the problem and promote the localization of tin plating solution. In this paper, the composition content of sulfate bright tin plating additive is determined and the process conditions are optimized by means of Hull bath test and bath performance test. The optimum composition and process parameters are as follows: lOOmL / L sulfate, 30 g / L stannous sulfate, 0.lg / L benzyl acetone NP-10 2mL / L, 0.3 g / L nicotinic acid, 1.8 g / L benzoic acid, 0.8 g / L potassium tartrate, 3 g / L tartaric acid, 3 g / L oxalic acid, 3 g / L ascorbic acid, temperature 20 鈩，

本文编号：1930114