How to Industrial Aluminum Electrophoretic Paint-WJW Aluminum Supplier Aluminum

Electro-Coating is an coating method that uses an outer electric field to orientation of pigments such as pigments and particles such as resin and other particles that are suspended in the electrophoresis solution.

Methods and skills of electrophoretic paint

(1) The electrophoretic paint in the name of individual metals, the process process is:

Pre -clearing Line removing oil Washing removing rust water washing medium heel water washing phosphorus water washing passivation electro -swinging grooves cleansing dry water washing drying offline.

(2) The substrate of the coating and the front treatment have a great impact on the electro -sword coating film. Individual castings adopt sandblasting or spraying balls for rust removal. Use cotton yarns to remove dust in the name of workpiece, and use 80# 120#Sand paper to clear the nominal residual steel balls and other miscellaneous objects. The name of the steel is treated with oil removal and rust removal. When the nominal request is too high, the name of phosphorification and passivation is performed. Black metal workpieces must be phosphorified before the anode electrophoresis, otherwise the corrosion resistance of the paint film is poor. When phosphorification is treated, the individual zinc phosphorus film is used, with a thickness of about 1 to 2 m.

(3) In the filtration system, individual first -level filtration is adopted. The filter is a mesh bag structure with a pore diameter of 25-75 m. Electric coatings are passed to the filter through the broken pump to filter. Considering factors such as the comprehensive conversion cycle and the quality of the paint film, the filter bag with a pore of 50 m is the best. How can it be satisfied with the quality request of the paint film and solves the problem of the filter bag.

(4) The reincarnation of the reincarnation system of electrophoretic paint directly affects the firmness of the slot and the quality of the paint film. Increasing the amount of reincarnation, the accumulation of groove fluids and bubbles decrease; Holding the reincarnation of the slot 6 to 8 times/h is more fantasy.

(5) With the extension of the production time, the impedance of the anode gap will increase, and the effective working voltage will land. Therefore, in production, the working voltage of the power supply should be gradually increased according to the loss of voltage to make up for the voltage drop of the anode.

(6) The concentration of impurities ions brought in by the ultrafiltration system to ensure painting quality. Pay attention to the operation of this system. It should be continuously operated after the same operation. It is strictly forbidden to operate intermittently in order to prevent the ultrafiltration membrane from drying up. After drying, the resin and pigments are attached to the ultra -filter membrane, and the helplessness is completely cleaned, which will affect the water permeability and utilization life of the superfractive membrane. The water output rate of the ultrafiltration membrane is in the falling trend with the running time. It should be cleaned once every 30 to 40 days to ensure the ultra -filter water required for super filtering and scouring.

(7) The electrophoresis coating method is practical in the production process of a large amount of pipeline. The update cycle of the electric switch should be within 3 months. Taking the electrical production line with an annual output of 300,000 steel rings as an example, the scientific governance of the slot solution is extremely important. Various parameters of the slot liquid are detected on schedule, and the slot solution is adjusted according to the test results. The parameters of the groove fluid are measured by the following frequency:

Electrician solution, ultrafiltration liquid and ultrafiltration polymeter, yin (yang) polar fluid, reincarnation solution, exfoliating polyester solution, solid content and conductivity rate once a day; Tank experiments twice a week.

(8) For the governance of the quality of paint film, the uniformity and film of the coating film should be checked frequently. The appearance should not have the scenes of pinhole, flowing, orange peel, wrinkles, etc. Wait for physical and chemical indicators. The examination cycle is based on the test standards of the manufacturer, and each batch needs to be tested.