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一、前言钢铁件的磷化膜应用范围很广。薄的磷化膜主要用于涂漆和工序间的防护,厚磷化膜使用范围更广,可在涂防护油脂后直接用于标准件,如螺栓、螺帽、垫圈等的防护,也用于减轻如齿轮、凸轮等的磨损。涂以润滑剂或皂化液后,可用于无切削的冷加工,如拉丝、拉管、冷挤压、冲击等。此外还可用于电绝缘、着色。厚膜磷化通常是在高温(92～98℃)条件下形成的。本文主要讨论中温(70～75℃)厚膜磷化的条件、磷化膜性能及提高中温磷化膜防护性的方法。
First, the preface steel parts phosphate coating a wide range of applications. Thin phosphating film is mainly used for the protection of paint and process, thicker phosphate film using a wider range of protective grease can be applied directly after the standard parts, such as bolts, nuts, washers and other protection, but also with To reduce such as gears, cams and other wear and tear. Coated with lubricant or saponified liquid, can be used for non-cutting cold work, such as drawing, pulling pipe, cold extrusion, impact and so on. In addition can also be used for electrical insulation, coloring. Thick film phosphating is usually formed at high temperatures (92-98 ° C). This article mainly discusses the medium temperature (70 ~ 75 ℃) thick film phosphating conditions, phosphating film performance and improve the protective method of medium temperature phosphating film.