金屬工件最大的“天敵”是腐蝕——銹跡斑斑的汽車車身、銹蝕穿孔的管道、褪色的五金件，都是腐蝕的“杰作”。電泳線正是利用電流的力量，為金屬工件“畫”出一層致密、均勻、耐腐蝕的“鎧甲”，讓金屬穿上“永不生銹”的外衣。

The biggest enemy of metal workpieces is corrosion - rusty car bodies, corroded and perforated pipes, and faded hardware are all masterpieces of corrosion. Electrophoretic lines use the power of electric current to "draw" a dense, uniform, and corrosion-resistant "armor" on metal workpieces, allowing the metal to wear a "rust free" outer layer.

電泳線，又稱電泳涂裝線或電泳生產(chǎn)線，是一種利用電泳涂裝技術(shù)將涂料微粒沉積在工件表面并形成涂層的設(shè)備或工藝線。其基本原理是在直流電場的作用下，帶正電荷或負(fù)電荷的膠體粒子（如涂料中的樹脂和顏料粒子）向相應(yīng)的電極移動，并沉積在基底表面形成涂膜。電泳涂裝按沉積性能可分為陽極電泳（工件是陽極，涂料是陰離子型）和陰極電泳（工件是陰極，涂料是陽離子型）。陰極電泳因耐腐蝕性強(qiáng)，已成為汽車行業(yè)的主流工藝。

Electrophoretic line, also known as electrophoretic coating line or electrophoretic production line, is an equipment or process line that uses electrophoretic coating technology to deposit coating particles on the surface of workpieces and form coatings. The basic principle is that under the action of a direct current electric field, colloidal particles with positive or negative charges (such as resin and pigment particles in coatings) move towards the corresponding electrodes and deposit on the substrate surface to form a coating film. Electrophoretic coating can be divided into anodic electrophoresis (where the workpiece is the anode and the coating is anionic) and cathodic electrophoresis (where the workpiece is the cathode and the coating is cationic) based on deposition performance. Cathodic electrophoresis has become the mainstream process in the automotive industry due to its strong corrosion resistance.

電泳線的完整工藝流程包括預(yù)處理、電泳涂裝、電泳后清洗和烘干四大工序。預(yù)處理包括除油、除銹、磷化等步驟。電泳涂裝將預(yù)處理后的工件浸入電泳槽中，在直流電場作用下，帶電膠體粒子向工件表面移動并沉積，形成均勻的涂層。電泳后清洗用超濾液和去離子水進(jìn)行多次清洗。最后將清洗后的工件送入烘爐烘干，使涂層完全固化。整個過程至少包括電泳、電沉積、電滲、電解四個電化學(xué)反應(yīng)過程。

The complete process of electrophoresis line includes four major steps: pretreatment, electrophoresis coating, post electrophoresis cleaning, and drying. Pre treatment includes steps such as oil removal, rust removal, phosphating, etc. Electrophoretic coating immerses the pre treated workpiece into an electrophoresis tank. Under the action of a direct current electric field, charged colloidal particles move towards the surface of the workpiece and deposit, forming a uniform coating. Wash multiple times with ultrafiltrate and deionized water after electrophoresis. Finally, the cleaned workpiece is sent to an oven for drying to fully cure the coating. The entire process includes at least four electrochemical reaction processes: electrophoresis, electrodeposition, electroosmosis, and electrolysis.

電泳涂裝的核心優(yōu)勢在于高涂層質(zhì)量、高效節(jié)能和適用性廣。電泳涂裝能夠形成均勻、致密且耐腐蝕的涂層。涂料利用率高，且能減少廢液和廢氣的排放。2025年中國電泳涂裝行業(yè)進(jìn)入轉(zhuǎn)型階段，粉末電泳漆和水性電泳漆加速替代傳統(tǒng)溶劑型產(chǎn)品。電泳涂裝是汽車車身涂裝的主要工藝，也是冰箱、洗衣機(jī)等家電產(chǎn)品外殼制造的重要工藝。從汽車車身到建筑五金，電泳線正在用電流的力量為金屬工件構(gòu)筑起一道堅(jiān)實(shí)的防腐屏障。

The core advantages of electrophoretic coating are high coating quality, high efficiency and energy saving, and wide applicability. Electrophoretic coating can form a uniform, dense, and corrosion-resistant coating. The coating has a high utilization rate and can reduce the discharge of waste liquid and exhaust gas. In 2025, China's electrophoretic coating industry will enter a transformation stage, with powder electrophoretic paint and water-based electrophoretic paint accelerating the replacement of traditional solvent based products. Electrophoretic coating is the main process for car body coating, as well as an important process for manufacturing the shells of household appliances such as refrigerators and washing machines. From car bodies to building hardware, electrophoresis lines are using the power of electric current to construct a solid anti-corrosion barrier for metal workpieces.

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