本发明公开了一种植酸钝化液以及制备和钝化处理方法，属于金属表面处理技术领域。该植酸钝化液由植酸、聚乙二醇或聚丙二醇、硅酸钠或磷酸钠盐、乙二胺四亚甲基磷酸和氨基三亚甲基膦酸或羟基亚乙基二膦酸组成。制备以上植酸钝化液，将表面预处理后的金属放入该植酸钝化液中进行电镀或浸渍处理，烘干后在金属表面得到钝化膜。根据本发明的技术方案中，植酸钝化液无毒、环保、价格低廉；植酸钝化液的制备方法简单，易于操作；钝化处理方法工艺流程短，节约水资源；钝化膜结构致密均匀，具有优异的抵抗金属腐蚀和防高温氧化作用以及良好的导电性能，且与涂料的粘接性能好。

The invention discloses a plant acid passivation solution and a preparation and passivation treatment method, belonging to the technical field of metal surface treatment. The phytic acid passivation solution is composed of phytic acid, polyethylene glycol or polypropylene glycol, sodium silicate or sodium phosphate, ethylene diamine tetramethylene phosphoric acid and amino trimethylene phosphonic acid or hydroxy ethylene diphosphonic acid. The above phytic acid passivation solution is prepared, and the metal after surface pretreatment is put into the phytic acid passivation solution for electroplating or immersion treatment, and a passivation film is obtained on the metal surface after drying. According to the technical scheme of the present invention, the phytic acid passivation solution is non-toxic, environmentally friendly, and low in price; the preparation method of the phytic acid passivation solution is simple and easy to operate; the passivation treatment method has a short process flow and saves water resources; and the passivation film structure it is dense and uniform, has excellent resistance to metal corrosion and high temperature oxidation, as well as good electrical conductivity, and has good adhesion to coatings.