(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 |
Conductivity of ed coatings and working fluids
Faulty Electrophoretic Coating
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.
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, 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.
(KODEST)ED Coating Cure System Overview
REPORT