| abstract |
A cleaning solution for a tin plating film for performing cleaning after electroless tin plating and before washing with water, wherein the surface of the tin plating film has good cleanability, the characteristics of the tin plating film are easy to maintain, and continuous use has been performed. In particular, it provides a cleaning solution that has little influence on the surface of the plating film and high stability over time. The cleaning liquid of the present invention is an acidic aqueous solution containing an acid, a complexing agent, a stabilizing agent, and chloride ions. The cleaning liquid has a chloride ion concentration of 2% by weight or more and a tin concentration of 0.5% by weight or less. [Selection figure] None |