Control the effect of electrophoresis craft exercise on electrophoresis paint film

Electrophoresis coating
, all the work is carried out in order to meet the requirements of electrophoresis paint film, electrophoresis paint quality is also related to the quality of the final paint film, quality is also related to the quality of the final paint film, so good electrophoresis paint must have strict process control to get a good paint film. If the groove PH is too low and MEQ is too high, then the coulomb efficiency decreases, the paint film becomes thinner, the surface quality decreases, and acid can be discharged through the anode system and the ultrafiltration system to adjust the PH and MEQ. The solvent content in the tank fluid is a parameter that needs to be strictly controlled, if it is too low, then the film thickness becomes thinner and the leveling becomes
worse
;
of the fluid must be controlled within the specified range and generally fluctuates no more than plus or minus 5 degrees. Depending on the tank fluid condition, after repeated selection to find an optimal value, can generally be selected at 28-32 degrees. If the temperature is too low, not only is the paint film too thin and uneven in thickness, but the surface state is irregular. Yanjibi is an important factor affecting surface roughness. A high yanki ratio will result in rough surfaces, so the face-based ratio must be controlled within a suitable range to ensure that the paint film surface is smooth and smooth, provided that the cover rate is met and no shrink holes are generated.
if the color paste is added too fast, it can easily cause insufficient dissolution, but also cause the surface of the paint film rough. For single-pack electrophoresis paint, add acid to the premixed jar before filling and stirring for as long as possible. After checking with the glass plate to prove that it has been fully dissolved, enter the main groove. For two-component electrophoresis paint, slowly add the slurry in front of the main circulation pump, or add an inline mixer and then add the circulating pump to the main tank.
if the surface of the paint film has particles or flocculation, will cause poor leveling, after baking electrophoresis paint film will appear uneven surface. There are many reasons for flocculation: such as the mediumness of the groove fluid is too low, broken groove lining or dry paint on the edge of the groove wall is broken by the pump formed flocculation,
ultra
filtration liquid
the pass rate is too low, in the flushing area will produce small flocculation, float paint in the next flushing area higher in 01 will flocculation. Prevention of flocculation can be solved by improving the filtration effect, flushing or replacing the ultrafiltration unit, adjusting the tank fluid with acids, solvents and

additives
each.