Laser parameters for different rust-prevention coatings

The company has compiled a table of laser parameters for different types of anti-rust coatings, covering common coating types and key parameters such as laser power, frequency and scanning speed.By comparing specific data, it helps users quickly match the best processing method, improving the effectiveness and efficiency of rust prevention. It is a reference for technicians in the fields of metal processing and equipment maintenance.

Why does the laser need to be adjusted to the type of rustproof coating?

We all know that the chemical characteristics and thickness of the anti-corrosion coating vary a lot.For example, epoxy resin is relatively hard, while zinc-based coating is softer. If you use the same laser parameters for both, you either burn through the coating or don't clean it thoroughly.Adjusting parameters such as laser power and scanning speed allows the base material to be protected while rust is removed.

Table of laser parameters for commonly used rustproofing coatings.

Epoxy resin coating.

Application: Heavy machinery, bridge structures.

Recommended parameters: power 80-120W, frequency 20kHz, scanning speed 800mm / s.

Note: High power can cause charring. It is recommended that you test on a small area first.

Zinc base coating.

Applications: Auto and boat parts.

Recommended parameters: power 50-80 W, frequency 15 kHz, scanning speed 1200 mm / s.

Note: The zinc layer is thin, so scan at a high speed to avoid overheating the metal substrate.

Polyurethane coating.

Applications: precision instruments, outdoor piping.

Recommended parameters: Power 60-100W, frequency 18kHz, scan speed 1000mm / s.

Points to note: Ensure good ventilation to prevent the emission of harmful gases from the materials.

The technique of parameter optimization in practical application.

First we do a small scale test, and then we do it in bulk.

Don't rush to use large equipment! Try it first on scrap material or in a hidden area to see the peeling effect and the condition of the base material.If you discover that the light has turned slightly yellow, this may mean that the frequency needs to be lowered.

The effect of humidity on the environment should not be ignored.

In particular, the damp weather in the south causes the moisture in the air to absorb the energy of the laser beam.If this situation arises, you can either install a dehumidifier or increase the power by about 5 %.

Regularly adjust the focal length of the laser head.

A 1-mm deviation in focus can result in a loss of 20 % or more of the power.He suggests that every four hours of work, a check be made with a color calibration chart. Don't think it's too much trouble--it's a lot better than having to redo the work!

What should you do if you have a problem?

If you find that the coating is not being removed cleanly, don't be too hasty to increase the power.Check to see if the overlap rate is not high enough (we recommend 30 % or more), or if the lens is dirty and needs cleaning.If it's really beyond our control, then we send the on-site photos and the data to the equipment manufacturer, and they have more experience and can usually quickly pinpoint the problem.