1. It is only suitable for primer coating on conductive objects. Non-conductive objects such as wood, plastic, cloth, etc. cannot use this coating method;
2. The coated object composed of a variety of metals, if the electrophoretic properties are not the same, it is not suitable to use the electrophoretic coating process;
3. Electrophoretic coating process cannot be used for the coated object that cannot withstand high temperature (16~185°C). In recent years, electrophoretic coatings that can be dried at 120°C and 150°C have been successfully developed ;
4. Electrophoretic coating should not be used for coatings with limited requirements for color, and the color of the coating film must be coated in separate slots;
5. Electrophoretic coating is not recommended for small-batch production occasions (the update period of the bath solution exceeds 1 month), because the renewal speed of the bath solution is too slow, the aging of the resin in the bath solution and the change of the solvent composition are large, which makes the bath Liquid is unstable.
1. The primer coating process can be fully automated and unmanned
From paint pretreatment to electrophoretic primer drying, it is possible to realize production line, which is suitable for continuous production of large quantities of water
2. Uniform film thickness can be obtained
It is easy to obtain a uniform target film thickness by adjusting the electric quantity. By selecting the type of electrophoretic paint and adjusting the parameters of the swimming coating process, the film thickness can be controlled within the range of 10~35μm. The paint film (film thickness and performance) deposited between workpieces and on different days can be reproduced differently from the dipping method. The coating film between the cracks does not produce "dissolving" phenomenon
3. The swimming penetration (force) is good, and the corrosion resistance of the inner cavity of the workpiece is improved, especially the corrosion resistance of the cathodic electrophoretic coating film is good
The parts that cannot be painted by spraying, dipping and other coating methods and the parts where the paint is difficult to enter can also be painted, and the coating film between the gaps will not be washed off by steam during drying, so that the inside of the workpiece The corrosion resistance of cavities, welds, edges, etc. is significantly improved. The salt spray resistance of cathodic electrophoretic paint film is above 500h, up to more than 1000 hours.
4. High utilization rate of paint
Compared with the spraying method, etc., the effective utilization rate of the paint can be higher than 95%. The paint in the tank is a water dilution solution with low solid content and low viscosity. The wet paint film brought out of the tank with less swimming is water insoluble. Finally, it can be closed and washed with "!" liquid to recover the paint liquid taken out of the tank.
5. Relatively high safety, low pollution coating (paint), no fire hazard
Compared with other water-soluble paints, the solvent content is less and due to the low concentration, there is no fire hazard. The paint is recycled well, the solvent content is low, and there is less pollution to water quality and air. The electrophoretic paint is a low- pollution paint . UF and RO devices are used to achieve The fully enclosed water washing can greatly reduce the amount of wastewater treatment.
6. The appearance of the electrophoretic coating film is good, and it has good
The coating film obtained by electrophoretic coating has less water content and less solvent content. During the drying process, it will not produce flow marks, dissolution, paint accumulation and other disadvantages like other coatings. The coating film after electrophoretic washing is dry, even hand It is not sticky to the touch. The drying time can be short, and it can be directly dried at high temperature
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