ASTM F21 - 65(2007)

    Standard Test Method for Hydrophobic Surface Films by the Atomizer Test

    Active Standard ASTM F21 | Developed by Subcommittee: E21.05

    Book of Standards Volume: 15.03


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    Significance and Use

    The atomizer test as described in this test method is nondestructive and may be used for control and evaluation of processes for the removal of hydrophobic contaminants. The test may also be used for the detection and control of hydrophobic contaminants in processing ambients. For this application, a surface free of hydrophobic films is exposed to the ambient and subsequently tested.4

    1. Scope

    1.1 This test method covers the detection of the presence of hydrophobic (nonwetting) films on surfaces and the presence of hydrophobic organic materials in processing ambients. When properly conducted, the test will enable detection of fractional molecular layers of hydrophobic organic contaminants. On very rough or porous surfaces the sensitivity of the test may be significantly decreased.

    1.2 The values stated in inch-pound units are to be regarded as the standard. The values given in parentheses are for information only.

    1.3 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use.


    2. Referenced Documents (purchase separately) The documents listed below are referenced within the subject standard but are not provided as part of the standard.

    ASTM Standards

    D351 Classification for Natural Muscovite Block Mica and Thins Based on Visual Quality


    ICS Code

    ICS Number Code 25.220.20 (Surface treatment)

    UNSPSC Code

    UNSPSC Code


    DOI: 10.1520/F0021-65R07

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