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Anodic oxide electrolytic coloring process operation requirements
to color uniform stability and control the color difference in a certain range, reduce the shading defects, in the actual production process, first of all to strengthen anodic oxidation process operation control, at the request of the operation is pay attention to the following aspects: 1, in the anodic oxidation of profile into the coloring trough must maintain larger inclination, and placed in the middle of the poles, to ensure that the pole pitch about equal. Control on the tie material area at the same time, each hanging maximum total surface area of no more than 44 ㎡. 2, check the slot liquid concentration, whether to conform to the requirements of the process. 3, sending coloring, crane hook pegged to the conductive beam must be off, and let stand for 0. 5 ~ 1 minute before sending color. 4, the same color coloring voltage must be equal, adjust the power supply voltage in advance before coloring. At the end of the 5, coloring, must immediately lifting, bath flow as soon as possible, as soon as possible transfer to sink water wash, do not stay in the coloring trough, strict control of air lifting time, fully wash the profiles of the inner hole after acid, can color board color, the color, master the material color is slightly deeper than the sample color. When color too shallow, again into the coloring trough electricity complementary color, when the color is too deep, back into the coloring trough ( No electricity) Fade or oxidation groove at the back of the acid tank. 6, because gold cannot fade, setting the coloring time shoulds not be too long. 7, after color profile should be after water wash secondary fully exert acid electrophoresis or hole sealing process can proceed. 8, strengthening rinse before dyeing, workpiece by should be completely flushed after anodic oxidation groove, especially the slit of artifacts, the place such as blind hole, otherwise the residual aluminum profile of acid and alkali in dyeing process will be slow, the dyeing solution pH value deviates from the normal range, and make the color on the surface of the residual alkali parts and clean parts have obvious difference, even corrosion oxide film and shows white. 9, after anodic oxidation dyeing, workpiece immediately after anodic oxidation dyeing. If the workpiece after anodic oxidation in air exposure time is too long membrane pore will narrow, and is likely to touch on dirt, which causes the difficulty in dyeing. Because if the dyeing tank is too small, needs the batch dyeing, we should treat dyeing the thing soak in clean water. 10 artifacts do not overlap, dyeing, dyeing artifacts we don't overlap, especially the flat parts, otherwise due to the overlapping parts covered form surface of Yin and Yang. 11, strengthen the flushing after dyeing, if the workpiece surface is rinsed clean, not leave residual pigment will pollution of the assembly.