Common Problems and Solutions in Color Marking of Aluminum Alloy

The company has developed solutions to common problems in the aluminum color marking process, such as uneven color, oxidation, and fading, and provides targeted solutions for parameter adjustment, surface treatment, and equipment maintenance.

Why is the color never uniform?

Let's start with that thorny question.Many friends have told me that the ink used for tattooing is not uniform in color, and that it tends to spread out like ink wash painting.The problem is that the current density isn't properly adjusted, just like cooking a dish over the wrong heat level.

The parameters must be set with care.

Rather than blaming the machine, first check the parameters.It is recommended that the current be controlled to within the range of 0.5 to 1.2 A / mm2, and the pulse width be set to 100 to 200 ns.You have to remember that different brands of electrolyte require different settings, just as different kinds of tea require different water temperatures.

How can the problem of the easy peeling of the oxide film be solved?

If the color comes off when you rub it, it's probably because the pretreatment wasn't done properly.One time, a customer brought in some aluminum coated with machine oil and tried to mark it. The result was that the oxide film came off in pieces like cookie crumbs.

Clean the surface thoroughly.

First, they go through an ultrasonic cleaner twice, then they are wiped with an alcohol-soaked cotton swab.Special attention needs to be paid to the corners of the part, to ensure that no residue is left.When the surface is finished, you can put on a white glove and touch it, and if the glove turns black, you have to do it over.

A corrosion spot appears after marking.

Some users have reported that after marking, the surface looks like it has freckles. This is actually caused by residual electrolyte.In the southern humid areas, if not treated promptly, the liquid can combine with the moisture in the air.

Post-processing cannot be taken lightly.

The label is then immediately washed with deionized water, and then dried with an air gun.The important thing is to do it right away! Right away! Right away! It is recommended that the work be left to air-dry for half an hour in a ventilated area before proceeding to the next step, so as to give the surface oxidation film adequate time to form.

Daily maintenance tips.

Don't wait until something goes wrong before thinking about maintenance.Each week they checked the wear on the head of the electrode; if it was blackened, they would immediately polish it with sandpaper.Change the electrolyte after every 50 stamps, just as you change your toothbrush regularly.