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    Evaluation of the Differences in Performing Particle Analysis with Water Instead of CFC Fluids

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    Most aerospace cleaning specifications require particulate analysis as part of the cleanliness verification process. Trichlorotrifluoroethane, CFC-113, is presently the test solvent of choice for cleanliness verification.

    It has been proposed to use water to replace CFC-113 as the test solvent for cleanliness verification; however it has been speculated that the differences in the physical properties between the two fluids will result in significantly different results in the particle analysis.

    A comparison of deionized water versus CFC-113 has been conducted for several types of sampling of components. This paper presents a description of the tests, the test results, observations, and conclusions regarding the subject.


    particle analysis, precision cleaning, aqueous cleaning, particulate, trichlorotrifluoroethane

    Author Information:

    Welch, PJ
    Materials Engineer, Materials Science Laboratory, National Aeronautics and Space Administration, Kennedy Space Center, FL

    Committee/Subcommittee: G04.02

    DOI: 10.1520/STP15950S