Akaline peptizing solution

The invention provides an alkaline peptizing solution. The alkaline peptizing solution comprises 1-8 g/L of alkali, 8-12 g/L of a complexing agent and 1-5 g/L of a stabilizer, wherein the alkali is sodium hydroxide or/and potassium hydroxide, the complexing agent is pyrophosphate potassium, and the stabilizer is sodium bicarbonate. By adoption of the scheme, bivalence tin in plastic surface colloid is adsorbed and stripped through the alkaline peptizing solution, the action time of the alkaline peptizing solution is short, the alkaline peptizing solution is not reacted with metal palladium while quickly removing the bivalence tin, and the complexing agent conducts complexation, so that small palladium particles in the colloid are exposed on the plastic surface, and thus the metal palladium has catalytic activity. 本发明提供种碱性解胶液，碱性解胶液包括碱、络合剂、稳定剂，碱的含量为1g/L～8g/L，络合剂的含量为8g/L～12g/L，稳定剂的含量为1g/L～5g/L，碱为氢氧化钠或/和氢氧化钾，络合剂为焦磷酸钾，稳定剂为碳酸氢钠，采用以上方案，通过碱性解胶液对塑料表面胶体中的二价锡吸附、剥离，碱性解胶液的作用时间短，快速去除二价锡的同时不与金属钯发生反应，并且有络合剂进行络合，使胶体中的钯小颗粒暴露在塑