Acidic tin plating liquid, preparation method thereof, and method for tin electric brush plating on surface of copper-based material

The invention provides acidic tin plating liquid, a preparation method thereof, and a method for tin electric brush plating on the surface of a copper-based material. The acidic tin plating liquid isprepared from the following components in concentration by mass: 35-55 g/L of tin sulphate, 50-75 g/L of methane sulfonic acid, 90-120 g/L of ammonium sulfate and 3-9 g/L of EDTA. The electric brush plating tin-plating liquid has the advantages of being stable in chemical property, nontoxic, environmentally friendly and the like, a tin-plated metal layer which is excellent in electrochemical property, even and dense in structure, and high in adhesive force can be formed on the surface of the copper-based material, and the acidic tin plating liquid is convenient and quick to operate, low in cost, and suitable for large-scale industrial application. 本发明提供了种酸性镀锡液及其制备方法和铜基材料表面电刷镀锡的方法，包括按照质量浓度计的以下组份：硫酸锡35-55g/L、甲磺酸50-75g/L、硫酸铵90-120g/L和EDTA 3-9g/L。本申请的电刷镀镀锡液具有化学性质稳定、无毒环保等优点，能够在铜基材料表面形成电化学性能优异、结构均匀、致密、附着力强的镀锡金属层，其操作简单便捷