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Metal plasma surface treatment of metal surface treatment applications

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Published on:

08 Oct,2020

Metal plasma surface treatment of metal surface treatment applications:

Plasma surface processor (PSMP) USES energetic particles and active particles in the plasma to bombish or activate the metal surface in order to remove dirt. No chemical reagent is used in the plasma cleaning process, so it will not cause secondary pollution. The cleaning equipment can be reused, so the operating cost of the equipment is low, and the operation is simple and flexible, which can realize the overall or partial cleaning of the metal surface and the complex structure. The surface properties of some plasmas after cleaning can also be improved, which is beneficial to the application of metal processing.

Principle of plasma surface treatment:

In addition to gas molecules, electrons and ions, plasma contains a large number of neutral atoms, atomic groups, free radicals and the light emitted by the plasma. Plasma cleaning is a process in which ions, electrons, excited atoms, free radicals and their activation reactions with pollutant molecules on the cleaned surface are respectively used to remove pollutants.

The role of electrons in cleaning metal surfaces:

Electrons in the plasma collide with atoms or molecules to form excited neutral atoms or groups of atoms (also known as free radicals) that can react with contaminant molecules in an activation reaction that removes the contaminant from the metal surface. In the process of electron transport to the surface cleaning area, it will collide with the adsorbed pollutant molecules on the surface to promote the decomposition of pollutant molecules and generate active free radicals, thus triggering the further activation reaction of pollutant molecules. In addition, electrons, which have very little mass, move faster than ions, so they reach the surface earlier than ions and make the surface negatively charged, triggering further activation reactions.

The role of ions in cleaning metal surfaces:

The cation is accelerated by the surface of the negatively charged object to obtain a large amount of kinetic energy. In this process, a pure physical collision occurs, which makes the dirt attached to the surface of the object be stripped off. At the same time, the impact of the cation also increases the chance of the activation reaction of pollutant molecules on the surface of the object.

The role of free radicals in cleaning metal surfaces:

In general, in plasma, the number of free radicals is more than that of ions, which is electrically neutral, has a long life, and has a large energy. Cleaning process, the pollutant molecules on the surface to be quite easy to combine with high-energy radicals, generate new free radical, these free radicals are also in high energy condition, and unstable, easily autolysis, and translated into smaller molecules that generate new free radicals at the same time, this process will continue, until it is broken into stable, volatile small molecules, and finally make the pollutants from the metal surface, in this process, the main role of free radicals is characterized by activation of energy transfer, in the process of free radicals and surface dirt molecules, there will be a lot of binding energy released, The released energy ACTS as a driving force for the activation reaction of surface dirt molecules, which is conducive to the thorough removal of pollutants under the action of plasma activation.

The role of emitting light in the process of cleaning metal surfaces:

When the plasma is generated, it emits light, which has high light energy and great penetration. Under the action of light, molecular bonds of dirt molecules on the metal surface break, which is beneficial to promote the further activation of pollutant molecules and make them remove the dirt on the metal surface.

To sum up, the plasma surface treatment machine rely mainly on the plasma electrons, ions and excited atoms and free radicals and other reactive ion activation, gradually break down the large molecules of organic pollutants on the metal surface, and finally form stable volatile simple small molecules, will stick to the surface of the dirt from the surface completely separated. The adhesion and wettability of metal surface can be greatly improved by plasma cleaning, and the improvement of these properties is of great help to the further surface treatment of metal materials. With the rapid development of high and new technology industry, plasma cleaning technology has been more and more widely used in electronics, semiconductor, photoelectric and other high and new technology fields.

metal plasma surface treatment

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