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電泳涂裝的優(yōu)缺點中英對照版

1380 人參與 2011年11月19日 02:16 分類 : 電泳工藝電泳原理評論

Why Electrocoat

為什么要電泳涂裝

Because of the marked advantages of electrodeposition, the process has, during the last two decades, become the dominant method for priming automobiles. A listing of the advantages of electrodeposition clearly explains the reasons for its spectacular success. 由于電泳涂裝具有明顯的優(yōu)點，此工藝在過去的20年中已成為汽車涂底漆的最主要方法。以下的電泳涂裝優(yōu)點清楚地說明了它獲得驚人成功的原因。

Advantages

優(yōu)點

Formation of protective films in highly recessed areas such as flanges and box sections provides critical corrosion protection. 電泳漆在非常隱蔽的部位，如翻邊以及箱式結(jié)構(gòu)，仍能形成完整的保護(hù)膜，從而得到較高的防腐蝕性。 Transfer efficiencies of better than 95% result in reduced paint waste, especially when compared with spray-applied coatings. 尤其與噴涂法相比，涂料利用率能達(dá)到95%以上，減少了涂料的浪費。 Use of water as practically the only carrier virtually eliminates fire hazard, materially reduces water and air pollution, and markedly reduces the cost of facilities for controlling these conditions. 使用水做載體，免除了火災(zāi)危險。大大降低了水和空氣的污染，明顯地減少了環(huán)保設(shè)備費用。 The low paint bath viscosity (approximately equal to that of water) results in ease of pumping and allows drainage of the coated vehicle. 槽液粘度低（大約等于水的粘度），泵送容易，也利于被涂車身的瀝干。 Freshly-deposited paint is insoluble in water, permitting complete rinsing and recovery of dragged-out material. 剛沉積電泳上的漆不溶于水，允許徹底清洗，且可回收帶出的槽液。 Uncured paint is dry enough to allow some handling. 未固化的漆膜不粘手，甚至可以作某些處理。 Unlike spray coatings, electrodeposited paint will not sag during baking. 不象噴涂的涂膜，電泳沉積的涂膜在烘干時不流掛。 Unlike dip coatings, electrodeposited paint is not washed off in enclosed areas by hot vapors during curing. 與浸法涂裝不同，電泳沉積在內(nèi)腔部位的涂膜，在烘干過程中不會被熱蒸汽洗掉。 Since the process is automated, direct labor costs are markedly reduced. 由于生產(chǎn)過程自動化，大大降低了直接勞動成本。 The deposited film is reproducible from part to part and from day to day. 電泳工藝穩(wěn)定，可保證漆膜均一涂于工件上。 The electrochemical process of depositing paint appears, at first examination, quite complicated; however, it is actually more trouble-free than other paint application processes for several reasons: 電泳涂裝法問世后，第一次考驗是相當(dāng)復(fù)雜的，但由于下列幾個理由，實際上掌握它并不比其它涂裝方法難。 The large tank volume tends to minimize variations in paint or process. 槽的容量很大，使涂料或工藝參數(shù)的波動減少到最小。 The operating parameters are well defined and are based on extensive experience. 操作工藝參數(shù)已有明確的規(guī)定，且是以豐富的經(jīng)驗為基礎(chǔ)。 Samples from the tank, which are tested weekly at the PPG Electrocoat Laboratory, often predict problems before they appear on the line. PPG電泳漆實驗室每周從槽中取的樣品做實驗，常常是在生產(chǎn)線上出現(xiàn)問題之前就能預(yù)報。 Since the PPG Electrocoat Laboratory constitutes a controlled environment, the following controls permit close monitoring of the commercial-scale process: 由于PPG電泳漆實驗室時監(jiān)控實驗室，可以實現(xiàn)以下對工業(yè)規(guī)模的工藝過程的嚴(yán)密控制。 A variety of metal substrates can be coated to permit extensive examination of differing conditions. 可以涂裝各種各樣的金屬底材，且可進(jìn)行不同條件的嚴(yán)格考驗。 Several tanks can be easily cross-compared. 可以容易的對幾個槽進(jìn)行相互比較。 Close anode-cathode distances in the coating tubes that are used in the electrocoat laboratory can be employed to magnify problems experienced in the field. 在電泳實驗室使用的試驗槽中，調(diào)近陽極-陰極間距可用來放大在這方面經(jīng)常出現(xiàn)的問題。

?Limitations

電泳涂裝的局限性

Although the advantages of the electrodeposition process far outweigh disadvantages, some limitations exist. Electrodeposition can take place only on electrically-conductive substrates. When a unit is coated and baked, the electrodeposition of a second coat is impossible with standard electrocoat products. Thus, electrodeposition is used mainly for the application of prime coats. Application of a variety of color coats requires separate dip tanks. 雖然電泳的優(yōu)點比缺點多，但是還是有一些局限性。電泳工藝只能用在導(dǎo)電的底材上；當(dāng)涂裝的物體烘干后。不可能進(jìn)行第二次電泳涂裝。因此，電泳涂裝主要被用來涂底漆；涂不同的顏色涂膜要在不同的槽中進(jìn)行。

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