阅读说明：本技术 无铬皮膜剂、金属件及其表面皮膜化处理方法 (Chromium-free coating agent, metal piece and surface coating treatment method of metal piece ) 是由 王饶玲 于 2017-05-27 设计创作，主要内容包括：本发明涉及一种无铬皮膜剂、金属件及其表面皮膜化处理方法。皮膜剂包括：0.2-4g/L氟锆酸,3-20g/L植酸,0.01-0.3g/L氟化镍,0.2-5g/L硅溶胶。此无铬皮膜剂在金属表面形成浅黄色的耐腐蚀钝化层,该皮膜剂不含损害环境的铬离子,提供涂装处理底层和防腐处理,是一种绿色环保产品钝化皮膜,此钝化皮膜与涂装漆膜等的结合能力良好、耐腐蚀能力强。(The invention relates to a chromium-free coating agent, a metal piece and a surface coating treatment method thereof. The coating agent comprises: 0.2-4g/L of fluozirconic acid, 3-20g/L of phytic acid, 0.01-0.3g/L of nickel fluoride and 0.2-5g/L of silica sol. The chromium-free coating agent forms a light yellow corrosion-resistant passivation layer on the metal surface, does not contain chromium ions which damage the environment, provides a coating treatment bottom layer and corrosion-resistant treatment, is a green environment-friendly product passivation coating, and has good binding capacity with a coating paint film and the like and strong corrosion resistance.)