In a previous study, the cleaning efficiency of a CO2 composite cleaning system for particulate removal was tested. The study covered particles from spores to fluorescent particles of different sizes as well as a variety of substrate surfaces, including aluminum, titanium, stainless steel, and nitinol. Particles were deposited using aerosol (dry) and droplet (wet) deposition. Results from the previous study show that the CO2 composite spray system is capable of cleaning to sterility for aerosol deposited spores and is capable of cleaning a minimum of a 4-log reduction for droplet deposited spores. This minimum 4-log reduction matches current Planetary Protection dry heat microbial reduction requirements. In this paper we will present new data to further correlate the cleaning efficiency with how contamination was introduced to the surface, the surface roughness, and particle size. Possible causes for such correlations will be discussed.


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    Title :

    Analysis of CO2 composite spray cleaning system results


    Contributors:
    Chen, Nicole (author) / Lin, Ying (author) / Jackson, David (author) / Chung, Shirley (author)


    Publication date :

    2017-03-01


    Size :

    631879 byte




    Type of media :

    Conference paper


    Type of material :

    Electronic Resource


    Language :

    English



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