One Article Shows You How The Procedures Work To Fulfill The Electrophoresis Coating Process

Electrophoresis coating uses an electric field to deposit paint particles onto metal surfaces, forming a uniform, corrosion-resistant film to enhance adhesion and protect substrates. This article will take the electrophoresis process of our factory's products as an example to introduce the entire electrophoresis coating workflow.

Here we go!

This is the first step, Pretreatment. Removing impurities such as oil, rust, and dust on the surface of the car body through physical and chemical treatment, and providing a clean and revitalized surface for subsequent processes, is the basic guarantee of coating quality.

Second step, Flood Rinse. 

The surface floating dust and loose impurities are initially rinsed with high-pressure and high-flow water flow to reduce the cleaning pressure of the subsequent process.

Third step, Pre-degreasing. Use a weak alkaline degreaser to initially remove a large amount of oil and grease, reduce the main degreasing load, and improve the overall degreasing efficiency.

Fourth, Main Degreasing. Strong degreasers (such as alkaline solutions) are used to thoroughly remove residual stubborn oil and particulate matter, ensuring that there is no oil residue on the metal surface and ensuring subsequent coating adhesion.

Fifth, Pure Water Rinse. Rinse the residual degreaser after degreasing with deionized water to avoid the reaction caused by the agent being brought into the next process and affecting the quality of the conversion film.

Sixth, Zirconium Conversion Coating. Through chemical reactions, uniform and dense zirconate films are formed, which enhance adhesion to subsequent coatings, improve corrosion resistance, and reduce coating defects.

Seventh, Pure Water Rinse, again. Rinse the remaining zirconium solution after zirconization to prevent spots from forming after the chemical solution dries, which will affect the uniformity of the electrophoretic coating.

Eighth, Phosphating. Phosphate conversion film is formed on the metal surface to enhance the adhesion of the coating, isolate the contact between the metal and the corrosive medium, and improve the corrosion resistance.

Ninth, Pure Water Rinse, once again. Rinse the phosphating solution remaining after phosphating to avoid residual salts or agents affecting the appearance and performance of the subsequent electrophoretic coating.

Tenth, Pre-Electrophoresis Transition Spray Rinse. Before electrophoresis, use low-pressure pure water to wash away trace impurities, adjust surface humidity, ensure uniform adhesion of the coating, and reduce defects such as pinholes and shrinkage holes.

Eleventh, finally, Electrophoresis (E-coat)! The body acts as an electrode under the action of an electric field, so that the electrophoretic coating particles are deposited in a directional manner to form a uniform organic coating, providing preliminary anti-corrosion protection and adhesion foundation.

Twelfth, Ultrafiltration First Rinse (UF1). Rinse with ultrafiltration filtrate spray to initially remove undeposited ionizing paint, recover paint and reduce wastewater pollution.

Thirteenth, Ultrafiltration Second Dip Rinse (UF2). By soaking to further clean the undeposited electrophoretic paint left over from the gaps in the body, the paint recovery rate is improved and surface impurities are reduced.

Fourteenth, Fresh Ultrafiltrate Final Rinse. Rinse with fresh ultrafiltrate to thoroughly remove trace amounts of electrophoretic paint and salt to avoid shrinkage pores or impurity spots after drying.

Fifteenth, Pure Water Final Rinse, last time. Final rinse with high-purity deionized water to remove impurities and salts from the residual ultrafiltrate and prevent watermarks or spots after baking.

Sixteenth, Baking / Curing. At high temperatures (160-180°C), the electrophoretic coating resin is cross-linked and cured, forming a hard and dense protective film that improves mechanical properties, corrosion resistance, and weather resistance.

After it is dry, you can proceed to other normal production processes. Vehicles that have undergone this electrophoresis program, our vehicles, even if they are run in places with high humidity by the sea, will not be corroded or rusted for ten years.

Thank you for watching, we are Hubei Off-Road Special Purpose Vehicle Co., Ltd., Our goal for the product is very simple, that is, the extreme durability!