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一、前言磷化处理使金属表面形成一层致密的磷酸盐转化膜,作为涂装底层或冷加工用润滑层,以及电绝缘层,耐磨层和防锈层等,是金属前处理中应用最广泛的一种工艺。根据磷化液主成份和成膜离子种类,磷化工艺可分为锌系,锰系和铁系等。根据处理温度高低,可分为高温磷化(80℃以上),中温磷化(50～70℃)、低温和常温磷化(40℃以下)。按膜重可分为重量级(7.5g/m~2
I. Introduction Phosphating treatment to the metal surface to form a dense layer of phosphate conversion coating, as the bottom coating or cold working lubrication layer, as well as the electrical insulation layer, wear-resistant layer and rust-proof layer, is the metal pre-treatment application A wide range of processes. According to the main components of phosphating solution and film-forming ions, the phosphating process can be divided into zinc, manganese and iron series. According to the processing temperature, can be divided into high-temperature phosphating (80 ℃), medium temperature phosphating (50 ~ 70 ℃), low temperature and room temperature phosphating (below 40 ℃). By membrane weight can be divided into heavyweight (7.5g / m ~ 2