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(KODEST)  After Wash System of  ed coating

(KODEST) After Wash System of ed coating


Process

Purpose

Spray on the tank (UF0)

Low pressure, rinse the groove liquid adhered to the surface of the workpiece back into the electrophoresis tank

UF1 soaking and recycling

Low pressure, remove the groove liquid on the surface and inside of the workpiece again; Rinse with fresh UF solution after exiting the tank.

UF2 spray recycling

High pressure, removal of solid paint on the surface of the workpiece

Pure water spray

High pressure, large volume water washing to remove solid paint surface. Using immersion method, immerse the workpiece in deionized water.
Unlike UF solution, deionized water does not bubble
dgkede
2025-06-11
Conductivity of ed coatings and working fluids

Conductivity of ed coatings and working fluids

Conductivity, also known as specific conductivity, refers to the amount of conductivity on a 1cm2 pole surface with a spacing of 1cm. In the electrophoretic coating process, the conductivity of the working solution, UF solution, polar solution, and pure water used is expressed by conductivity. The unit of conductivity is µ s/cm.


The conductivity of electrophoretic working fluid is related to factors such as the solid content, pH value, temperature, and impurity ion content of the working fluid. It is one of the important process parameters for electrophoretic coating and should generally be controlled within a certain range. The size of the range depends on the type of electrophoretic coating, and high or low conductivity of the working fluid is not good, which directly affects the quality of electrophoretic coating.

dgkede
2025-05-20
Faulty Electrophoretic Coating

Faulty Electrophoretic Coating

Electrophoretic coating, a widely used industrial process, offers excellent corrosion protection and uniform film thickness. However, faulty electrophoretic coatings can significantly compromise product quality and lifespan. Understanding the causes and effects of these defects is crucial for ensuring product reliability.

Poor Film Adhesion

Weak adhesion between the coating and substrate is a common problem. This can stem from inadequate surface preparation, such as insufficient cleaning or improper pretreatment. Improperly mixed coating bath or incorrect application parameters also contribute to poor adhesion, leading to peeling or flaking.

Consequently, the protective barrier is weakened, increasing vulnerability to corrosion and environmental damage. This necessitates costly rework or product rejection.

Uneven Coating Thickness

Variations in coating thickness result in non-uniform protection. This can be due to inconsistencies in the electrical field during the deposition process, faulty electrode configuration, or localized variations in the coating bath concentration. Thinner areas are particularly susceptible to corrosion.

The unevenness impacts the aesthetic appeal of the finished product and undermines its performance. Achieving a uniform coating is essential for optimal protection and consistent quality.

Pinholing and Defects

Pinholing, the presence of small holes in the coating, allows corrosion to initiate and spread. This can arise from air bubbles trapped during the process, insufficient coating thickness, or contamination of the coating bath.

Other defects like blistering, cracking, or orange peel effects further diminish the protective properties and mar the appearance of the finished product, requiring corrective measures or rejection.

dgkede
2025-05-08
(KODEST)ED Coating Cure System Overview

(KODEST)ED Coating Cure System Overview

A commonly used electrophoretic curing furnace is a gas direct heating curing furnace. This type of curing oven can cure all depressions, and its operating cost is also relatively economical. Sometimes, a radiation zone is also set at the entrance of the curing oven, where the circulating wind speed is lower and there is less dust in the air, which can reduce the viscosity of the cured surface of the coating and make it less susceptible to pollution from pollutants.

Sometimes a dehydration zone can also be set up, which is a heating channel. The workpiece is heated at a temperature of 60 ℃~70 ℃ for 2-3 minutes, and the dehydration zone is set at the entrance of the curing furnace.

This scalability ensures the system can be adapted to meet the evolving needs of businesses, from small-scale operations to large-volume production facilities.
dgkede
2025-04-29

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