Metal surface pre-treatment liquid

The invention discloses a metal surface pre-treatment liquid. The metal surface pre-treatment liquid comprises 100-300 parts of phosphoric acid with a concentration of 90%, 10-50 parts of fatty alcohol polyoxypropylene ether, 10-40 parts of quaternary ammonium salt, 10-25 parts of hydrogen peroxide, 50-150 parts of tartaric acid, 20-40 parts of sodium tripolyphosphate, 2-9 parts of benzotriazole, 20-60 parts of ethylene glycol, and 10-30 parts of boric acid. Therefore, the treatment agent has the characteristics of being cyclically used, pollution-free and drainage-free; and the generated residues can be recycled, thus the comprehensive cost is reduced. 本申请公开了种金属表面前处理液，包括浓度为90％的磷酸100-300份，脂肪醇聚氧丙烯醚10-50份，季铵盐10-40份过氧化氢10-25份，酒石酸50-150份，三聚磷酸钠20-40份，苯并三氮唑2-9份，乙二醇20-60份，硼酸10-30份。由此，处理剂具有可循环使用、无污染、无排放的特点，产生的残渣可以回收利用，降低了综合成本。