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金鋼板磷化是常用的前處理技術，原理上應屬于化學轉化膜處理。工程上應用主要是鋼鐵件表面磷化，但有色金屬如鋁、鋅件也可應用磷化。
The phosphating of steel plate is a kind of commonly used pretreatment technology. Application of the project is mainly on the surface of iron and steel phosphating, but non-ferrous metals such as aluminum, zinc parts can also be applied phosphating.
磷化原理：
Phosphating principle:
工件（鋼鐵或鋁、鋅件）浸入磷化液（某些酸式磷酸鹽為主的溶液），在表面沉積形成不溶于水的結晶型磷酸鹽轉化膜的過程，稱之為磷化。
The workpiece (steel or aluminum, zinc) into the phosphating solution (some acid phosphate based solution), the surface of the formation of water insoluble crystalline phosphate conversion film.
把金屬放入含有錳、鐵、鋅的磷酸鹽溶液中進行化學處理，使金屬表面生成一層難溶于水的磷酸鹽保護膜的方法，叫做金屬的磷酸鹽處理。磷化膜層為微孔結構，與基體結合牢固，具有良好的吸附性、潤滑性、耐蝕性、不粘附熔融金屬（Sn、Al、Zn）性及較高的電絕緣性等。
The process of chemical treatment of a metal into a solution containing manganese, iron and zinc to form a layer of insoluble phosphate protective film on the surface of the metal. The phosphating film is a microporous structure, which is firmly bonded with the substrate, and has good adsorption property, lubricity, corrosion resistance, non adherence to molten metal (Sn, Al, Zn) and high electrical insulation.
磷化分類：
Phosphating classification:
按合金鋼板處理溫度分：高溫型（75-100℃，能耗大，磷化物沉積多，形成的磷化膜厚度達10-30g/㎡）、中溫型（50-75℃，處理時間5-15min，磷化膜厚度達1 -8g/㎡）、低溫型（30-50℃）和常溫型（10-30℃，節省能源，使用方便，除加氧化劑外還加促進劑，能耗小，但溶液配制較復雜，膜厚度達0.2-7g/㎡）。
According to the alloy steel plate processing temperature: high temperature (75-100 DEG C, high energy consumption, multi phosphating film thickness phosphide deposition, the formation of up to 10-30g/ meters) and medium temperature (50-75 DEG C, processing time 5-15min, phosphating film thickness of 1 -8g/ m) and low temperature (30-50 DEG C) and room temperature (10-30 DEG C, save energy, easy to use, in addition to oxidants and accelerant, the energy consumption is small, but the solution is complicated, the membrane thickness of 0.2-7g/ m).
按磷化液成分分：鋅系磷化、鋅鈣系磷化、鋅錳系磷化、鐵系磷化、錳系磷化和復合磷化等。
According to the composition of the phosphating solution: zinc series phosphating, zinc calcium series phosphating, zinc manganese series phosphating, iron phosphating, manganese phosphating and composite phosphating.
按磷化處理方法分：化學磷化、電化學磷化。
According to the phosphating treatment methods: chemical phosphating, electrochemical phosphating.
按磷化膜質量分：重量級（膜重7.5g/㎡以上）、次重量級（膜重4.6-7.5g/㎡）、輕量級（膜重1.1-4.5g/㎡）和次輕量級（膜重0.2-1g/㎡）。
According to the quality of the phosphating film is divided into: (more than 7.5g/ square meters heavyweight film weight), heavyweight (film 4.6-7.5g/ m), lightweight (film 1.1-4.5g/ m) and lightweight (film 0.2-1g/ m).
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