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Laser Derusting: Principle, Characteristics And Application

The steel billet is affected by long-term exposure, which affects the appearance and performance.

Although with the development of modern technology, stainless steel has appeared and can also be used in life, it is time-consuming and laborious to use stainless steel to renovate old houses.

Also, not all products can use stainless steel, so descaling becomes a headache.

Laser Derusting

Traditional cleaning industry has a variety of cleaning methods, mostly using chemical and mechanical methods.

With the increasingly strict requirements of environmental protection laws and regulations and the increasing awareness of environmental protection and safety, the types of chemicals that can be used in industrial production cleaning will become less and less.

How to find a cleaner and non-destructive cleaning method is a problem we have to consider.

Laser cleaning has the characteristics of no grinding, non-contact, no thermal effect and suitable for all kinds of objects.

It is considered to be the most reliable and effective solution.

At the same time, laser cleaning can solve the problems that cannot be solved by traditional cleaning methods.

laser cleaning

When there are submicron pollution particles on the workpiece surface, these particles often stick very tightly, which can not be removed by conventional cleaning methods, but cleaning the workpiece surface with nanometer laser radiation is very effective.

In addition, because the laser is non-contact cleaning to the workpiece, it is very safe to clean the precision workpiece or its fine parts, which can ensure its accuracy.

Therefore, laser cleaning has unique advantages in the cleaning industry.

It is very effective to use high-energy laser to eliminate corrosion. Laser burns off metal surfaces, such as rust, paint, etc., while using metal reflection characteristics. Make sure that the parts themselves are not damaged.

Principle of laser derusting

Principle of laser derusting

The principle of this laser descaling agent is that when rust is subjected to high temperature, it will evaporate instantly.

After plasma separation, the derusting part will not be damaged even if exposed to laser due to the high reflectivity of the bottom metal to light.

Therefore, this laser descaling method is effective and safe, and can even perfectly clean the corners of components such as letters and bolts.

Therefore, whether it is difficult to remove rust or not, it can be easily handled. As long as light can reach, rust has nowhere to hide.

Why can lasers be used for cleaning? Why does it not cause damage to the cleaned object?

Why can lasers be used for cleaning

First, understand the essence of laser.

In short, the laser is no different from the accompanying light (visible light and invisible light) around us, but the laser uses a resonator to concentrate the light in the same direction, and has better performance than simple wavelength and coordination.

Therefore, theoretically, all wavelengths of light can be used to form a laser.

However, in fact, there are few media that can be excited, so the laser light source that can produce stable and suitable for industrial production is quite limited.

Nd: YAG laser, carbon dioxide laser and excimer laser are widely used.

Because Nd: YAG laser can be transmitted through optical fiber and is more suitable for industrial application, it is also widely used in laser cleaning.

widely used in laser cleaning

Its physical principle can be summarized as follows:

a) The beam emitted by the laser is absorbed by the contaminated layer on the surface to be treated.

b) The absorption of large energy forms a rapidly expanding plasma (highly ionized unstable gas) and produces shock waves.

c) The shock wave turns the pollutants into fragments and is removed.

d) The light pulse width must be short enough to avoid heat accumulation that destroys the treated surface.

e) Experiments show that when there are oxides on the metal surface, the plasma occurs on the metal surface.

physical principle

Application of laser derusting

Laser derusting is applicable to small area derusting.

Most of the products with high added value are cleaned, such as precision parts cleaning, aerospace components, military industry, nuclear power industry, parts micro processing, high-precision cleaning, environmental protection cleaning methods, high-precision industry cleaning, slide rail cleaning, shipyard parts cleaning, semiconductor processing, rollers, precision parts, welding seams.

Application of laser derusting

Laser derusting can replace pickling and phosphating cleaning equipment, and can be used for stainless steel weld bead and weld spot cleaning, titanium alloy cleaning and weldment cleaning.

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