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Example of parts for plasma fine cleaning    Plasma Fine Cleaning
Process Description

Plasma surface cleaning allows organic contaminants such as greases, oils and paint residues to be removed from steel, non-ferrous metals, plastics, glass and ceramics without the use of solvents. An ultrafine cleaning or degreasing of the surfaces can be achieved in this way.


Plasma cleaning has a large number of advantages compared with conventional methods, a few of which are listed below.

    High degree of cleaning (ultrafine cleaning)
    No residues as these contaminants are burned with oxygen to produce low volume of carbon dioxide
    Loss process temperature (30-80° C), thus no thermal burden on the components
    Very high effectiveness even in confined spaces
    High environmental friendliness; no occupational safety measures are necessary


During plasma cleaning, oxygen is ionised at room temperature in a vacuum treatment chamber using a plasma. The resulting highly reactive oxygen ions burn organic contaminants cold to produce carbon dioxide without placing a thermal burden on the components. The process is therefore very environmentally friendly as only oxygen is used as the reactive gas for cleaning. The reacted surface product is low volumes of non toxic CO2.
For treatment in the plasma, the parts to be cleaned are placed into a vacuum chamber. The cleaning process then takes place in the following steps:

    The vacuum chamber is evacuated to a process pressure of 10-100 Pa.
    A plasma is ignited between several electrodes inside or outside the chamber.
    Depending on the application, the frequency of the plasma lies:
      in the medium frequency (kHz)
      high frequency (14 MHz)
      or microwave range
    The plasma is generated by a pulsed DC or AC voltage.


The process is then maintained for between a few seconds and 30 minutes until all the contaminants have been removed.
The process is of particular benefit where extreme demands are made on the cleanliness requirement of the surface.


For example high surface cleanliness requirements are mandatory for successful:

    Thin film coating
activation, construction and building of plants wettability, coating, bipolal pulse, technology ,thin films, degreasing, Gas nitriding, hardening, hard coatings, hydrophil, hydrophob, corrosion, corrosion protection, plastic surfaces, nitriding, nitrocarburizing, surface technology, surface refinement, surface hardening, oxidizing, PA CVD/PE CVD coating, plasma, plasma activation, plasma, power supply, plasma hardening, plasma nitriding, plasma plant, plasma oxidizing, plasma polymerisation, plasma cleaning, plasma sterilising, plasma technology, polymerization, pulsed plasma, cleaning, life standing time, sterilizing, power supply, TiCN coatings, TiC coatings, TiN coatings, vacuum plants, agglutinate, wear, wear protection, heat treatment, tool hardening    Cleaning of printed curcuit boards


Other cleaning methods generally employ chemicals in aqueous solution or highly volatile grease dissolving solvents. This form of component cleaning is becoming more and more problematical with respect to environmental protection, as the resulting wastes are difficult to dispose of and have a major impact on the environment.

PlaTeG GmbH
A Company of the PVA TePla Group
Postfach 210642
57030 Siegen
Deutschland / Germany

Managing Directors: Dr. Reinar Grün ; Arnd Bohle
Amtsgericht Siegen, HRB 8070  ;  USt.Id. DE 814730669
e-mail: service@plateg.de

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