ASTM F22-02(2007)

NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.
Contact ASTM International (www.astm.org) for the latest information
Designation: F22 − 02 (Reapproved 2007)
StandardTest Method for
Hydrophobic Surface Films by the Water-Break Test
ThisstandardisissuedunderthefixeddesignationF22;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginal
adoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscript
epsilon (´) indicates an editorial change since the last revision or reapproval.
This standard has been approved for use by agencies of the Department of Defense.
1. Scope overflowing with water. The interpretation of the test is based
upon the pattern of wetting. In the absence of hydrophobic
1.1 This test method covers the detection of the presence of
films, the draining water layer will remain as a film over the
hydrophobic (nonwetting) films on surfaces and the presence
surface. In areas where hydrophobic materials are present on
of hydrophobic organic materials in processing ambients.
the surface, the draining water layer will break up into a
When properly conducted, the test will enable detection of
discontinuous film within one minute.
molecular layers of hydrophobic organic contaminants. On
veryroughorporoussurfaces,thesensitivityofthetestmaybe
5. Significance and Use
significantly decreased.
5.1 The water-break test as described in this test method is
1.2 The values stated in SI units are to be regarded as the
nondestructive and may be used for control and evaluation of
standard. The inch-pound values given in parentheses are for
processes for the removal of hydrophobic contaminants. The
information only.
test may also be used for the detection and control of
1.3 This standard does not purport to address all of the
hydrophobic contaminants in processing ambients. For this
safety concerns, if any, associated with its use. It is the
application, a surface free of hydrophobic films is exposed to
responsibility of the user of this standard to establish appro-
the ambient and subsequently tested.
priate safety and health practices and determine the applica-
bility of regulatory limitations prior to use.
6. Interferences
6.1 Loss of sensitivity may result from either of the follow-
2. Referenced Documents
ing factors:
2.1 ASTM Standards:
6.1.1 The presence of hydrophilic substances on the surface
D351Classification for Natural Muscovite Block Mica and
to be tested, in the test equipment, or in the test materials, or
Thins Based on Visual Quality
6.1.2 An unusually rough or porous surface condition.
3. Terminology
7. Apparatus
3.1 Definitions:
7.1 Overflow Container, such as a glass beaker.
3.1.1 hydrophilic—having a strong affinity for water, wet-
7.2 Low Power Microscope, (5 to 50×) and light source for
table.
observation of small piece parts.
3.1.2 hydrophobic—having little affinity for water, nonwet-
table.
8. Reagents and Materials
4. Summary of Test Method
8.1 Purity of Reagents—Reagent grade chemicals shall be
used in all tests. Unless otherwise indicated, it is intended that
4.1 The water-break test is performed by withdrawing the
all reagents shall conform to the specifications of the Commit-
surface to be tested, in a vertical position, from a container
teeonAnalyticalReagentsoftheAmericanChemicalSociety,
where such specifications are available. Other grades may be
This test method is under the jurisdiction of ASTM Committee E21 on Space
used, provided it is first ascertained that the reagent is of
Simulation andApplications of SpaceTechnology and is the direct responsibility of
Subcommittee E21.05 on Contamination.
Current edition approved April 1, 2007. Published April 2007. Originally
approved in 1962. Last previous edition approved in 2002 as F22–02. DOI: Reagent Chemicals, American Chemical Society Specifications , American
10.1520/F0022-02R07. Chemical Society, Washington, DC. For suggestions on the testing of reagents not
For referenced ASTM standards, visit the ASTM website, www.astm.org, or listed by the American Chemical Society, see Analar Standards for Laboratory
contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM Chemicals, BDH Ltd., Poole, Dorset, U.K., and the United States Pharmacopeia
Standards vol
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