Film-Type Contamination and Outgassing Rates, and how to Detect Them the Easy Way 


Knowledge of the cleanliness and outgassing properties of products – from the beginning of the process chain by approving incoming goods up to the final product – is becoming increasingly important. With the help of that knowledge, manufacturers in the aerospace industry are able to control and protect their process chains to improve final quality and avoid contamination, and reduce loss of production and customer complaints.

The twin sister devices VIDAM and ARGAT guarantee fully automatic, easy-to-handle and non-destructive analysis of samples regarding film-type contamination and outgassing rates. These devices give quantitative and qualitative results for parts and assemblies ranging from bulk goods to complex geometries.

 

Optimising cleaning processes

Proper part cleaning is becoming increasingly relevant for many industries. In particular, testing, verification and evaluation of cleaning processes are major keys for reproducible production processes. Although methods for detection of particulate contamination have been established for some time, no adequate measuring methods have existed for film-type contaminants. TREAMS GmbH offers the first fully automatic cleanliness measurement device for the detection of chemical-film-type contaminants.

 

What are chemical-film-type contaminants?

Chemical-film-type contaminants are thin, coherent (non-particulate) films of undesirable, external substances partially or completely covering the surfaces of parts. 

 

Where do chemical-film-type contaminants originate from?

TREAMS diagram


What are the effects of chemical-film-type contamination?

Film-type contamination can affect many subsequent processes. Possible consequences are:

  • Coating defects and therewith optical defects, which may impair product properties (corrosion resistance, mountability, etc.)
  • Contamination of processing equipment, e.g. failure of optical components
  • Reduction in quality of joining processes
  • Outgassing, which can have a negative impact on process stability
  • Deteriorated characteristics (e.g. resolution) of optical components                                                                                                                     

VIDAM

VIDAM               

 Cleanliness-measuring device for film-type contamination:              

    • - Quantitative results (g/cm²)
    • - Non-destructive testing
    • - Fully automated measurement
    • - Comparable results
    • - Residual dirt identification

 

 

 

VIDAM is a cleanliness-measuring device that determines chemical-film-type contamination of the entire product surface by vacuum-induced desorption. Single components as well as assemblies can be analysed – non-destructively and in a fully automated process. As a result of spectral measurement, contaminants can be clearly identified and assigned to their causes. Furthermore, VIDAM provides absolute and quantitative values in gram per surface or component, which enables appropriate evaluation limits to be established.

                                                                                     

VIDAm table

 

Qualitative and quantitative outgassing measurement of materials and assemblies

Evaluation of the outgassing behaviours of materials, components and assemblies is of essential importance for many modern technology processes in the aerospace industry. This includes the basic classification of materials regarding their vacuum compatibility, which depends on the operating pressure and the prevailing temperatures.

                                                                                                                         ARGAT

ARGAT

Automatic residual gas analysis tool:

        • - Quantitative results (mbar · l / s / cm²)
        • - Direct report output
        • - Fully automated measurement
        • - Comparable results
        • - Automatic detection of substances 

 

 

 

ARGAT is a measuring device for residual gas analysis under vacuum. It quickly and fully automatically determines outgassing rates of single parts or complete assemblies. As a result of automatic spectral measurement, residual gas composition can be directly determined and gas contributions can be clearly assigned to their origins. Furthermore, ARGAT provides absolute and quantitative results in mbar · l / s, which allows appropriate outgassing limits to be established. 

 

ARGAT table

 


TREAMS GmbH will be exhibiting at Space Expo Europe at Stall H74