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Analysis on Regulation and Management of Electrophoretic Coating Technology

release time:2018-07-26 09:57:52  views:

The solvent-soluble electrophoretic paint contains a water-soluble organic solvent that acts as a solvent, and has a smaller content than other coatings. However, it has a certain influence on the film thickness and the stability of the coating, and is generally required to be controlled within a certain range. The solvent content in the working fluid is increased, the film thickness is increased, the throwing power and the cracking voltage are lowered, the solvent content is low, the film thickness is lowered, and the appearance (smoothness) of the paint film is deteriorated. The level of solvent in the working fluid can be adjusted by adding a solvent and replacing the ultrafiltrate.

The bathing time of the bathing time in the electrophoresis tank refers to the time during which the coated workpiece forms a coating film (energized) under the working fluid level. This period of time is generally limited to about 3 minutes. As the bathing time increases, the film thickness increases. The increase or decrease in the bathing time can indirectly affect the smoothness and appearance quality of the paint film surface. The bathing time plays an important role in the electrophoretic coating process management. Appropriately increasing the bathing voltage can shorten the bathing time, and the bathing time can be increased at the lower bathing voltage to ensure the thickness of the film.

The swimming coating voltage is in the electrophoretic coating line. The swimming coating voltage can control the film forming speed and deposition amount of the electrophoretic coating process. Generally, the working fluid temperature and the swimming time are certain. If it is necessary to increase or decrease the film thickness, it can be improved. Or reduce the voltage to achieve. In the continuous pipeline production type electrophoretic coating equipment, generally, the voltage of the first energization section is controlled below the lower limit of the working voltage, and the voltage of the second section is controlled to be even slightly higher than the operating voltage.

After electrophoresis, the cleaned and coated objects are attached to the surface of the coating after the electrophoresis, and the working liquid is not sprayed on the surface, and if it is directly dried, a paint film defect such as a smear is generated, and if it is directly discharged, the waste is generated. In order to eliminate the lacquer film defects and recover the working fluid, it must be washed after electrophoresis. After electrophoresis, the cleaning can be divided into two stages: recovery of the working liquid brought out: washing with ultra-filtrate or deionized water at the outlet, and the washing liquid is directly returned to the tank, preferably within 1 min of the coated object. Cleaning. Improve the appearance of the paint film: rinse with circulating ultrafiltrate, usually 23 times, and finally rinse with deionized water.

Epoxy sealing primer is two-component. Before use, the components of A and B are strictly in accordance with the ratio of 121. After mixing and mixing, the mixture can be used. It is applied to the surface of concrete members. It requires uniform and no-blow brush. After 26 hours, it is carried out. Process. The Ethylene B component epoxy asphalt anticorrosive paint is matched strictly according to the ratio of 31, and the mixture is evenly mixed and then applied to the surface of the two-component epoxy sealing primer. The construction is required to be uniform and no leakage brush, and the thickness of the paint film is reached. After 100120m, 1824h, the next process is applied.