Pre-treatment Solution for Metallic Tin Granule and Pre-treatment Method using the Same

摘要

The present invention relates to a pre-treatment solution and the pre-treatment method using the same of the tin particles used in the electric tin plating step using an insoluble anode. ; The present invention provides a pre-treatment solution consisting of tin particles with an aqueous solution containing the same acid with at least one of the components of the plating solution and hydrogen peroxide 5 ~ 50g / ℓ. Further, in the electric tin plating step, prior to feeding the metallic tin particles in a plating solution, and hydrogen peroxide 5 ~ 50g / ℓ in the tin particles, tin particles, applying an aqueous solution containing the same with at least one acid to the ingredients of the plating solution The pretreatment method is also provided. ; If pre-treatment the metal tin particles with pre-treatment liquid of the tin particles according to the present invention, to minimize the latency time for the dissolution reaction of the tin can increase the efficiency of utilization of oxygen, and thus, can be significantly reduced the incidence of sludge . Further, according to the present invention, can always be kept constant to the efficiency of the oxygen dissolved in the reaction involved, it is possible to easily control the tin ion concentration of the plating solution with only oxygen supply. ; Tin dissolution, the acid solution, pre-treatment, the oxygen use efficiency