ASTM D6625-13(2020)
(Practice)Standard Practice for Conducting a Test of Protective Properties of Polish Applied to a Painted Panel Using Fluorescent UV-Condensation Light- and Water-Exposure Apparatus
Standard Practice for Conducting a Test of Protective Properties of Polish Applied to a Painted Panel Using Fluorescent UV-Condensation Light- and Water-Exposure Apparatus
SIGNIFICANCE AND USE
3.1 Organic coatings on exterior exposure are subjected to attack by degrading elements of the weather, particularly ultraviolet light, oxygen, and water. This practice may be used for evaluating the protective behavior of polish film applied to a coating. This polish-coated coating is then exposed in an apparatus that produces ultraviolet radiation, temperature variation, and water condensation for a given time period.
3.2 No single light exposure apparatus, with or without water, can be specified as a direct simulation of natural exposure. This practice does not imply a specific correlation with outdoor exposure. It is, however, useful in screening the relative protective qualities of a polish within the test parameter.
SCOPE
1.1 This practice covers the selection of test conditions from Practice G53 to be employed for exposure testing of polish-coated paint, related coatings, and materials. This practice covers the basic principles and operating procedures for using fluorescent ultraviolet (UV) and condensation apparatus to simulate the deterioration caused by sunlight and water as rain or dew.
1.2 The values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard.
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, health, and environmental practices and determine the applicability of regulatory limitations prior to use.
1.4 This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.
General Information
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Standards Content (Sample)
This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the
Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.
Designation: D6625 − 13 (Reapproved 2020)
Standard Practice for
Conducting a Test of Protective Properties of Polish Applied
to a Painted Panel Using Fluorescent UV-Condensation
Light- and Water-Exposure Apparatus
This standard is issued under the fixed designation D6625; the number immediately following the designation indicates the year of
original adoption or, in the case of revision, the year of last revision. A number in parentheses indicates the year of last reapproval. A
superscript epsilon (´) indicates an editorial change since the last revision or reapproval.
1. Scope 3. Significance and Use
1.1 Thispracticecoverstheselectionoftestconditionsfrom 3.1 Organic coatings on exterior exposure are subjected to
Practice G53 to be employed for exposure testing of polish- attack by degrading elements of the weather, particularly
coated paint, related coatings, and materials. This practice ultraviolet light, oxygen, and water. This practice may be used
covers the basic principles and operating procedures for using for evaluating the protective behavior of polish film applied to
fluorescent ultraviolet (UV) and condensation apparatus to a coating. This polish-coated coating is then exposed in an
simulate the deterioration caused by sunlight and water as rain apparatus that produces ultraviolet radiation, temperature
or dew. variation, and water condensation for a given time period.
1.2 The values stated in SI units are to be regarded as 3.2 No single light exposure apparatus, with or without
standard. No other units of measurement are included in this water, can be specified as a direct simulation of natural
standard. exposure. This practice does not imply a specific correlation
with outdoor exposure. It is, however, useful in screening the
1.3 This standard does not purport to address all of the
relative protective qualities of a polish within the test param-
safety concerns, if any, associated with its use. It is the
eter.
responsibility of the user of this standard to establish appro-
priate safety, health, and environmental practices and deter-
4. Apparatus and Material
mine the applicability of regulatory limitations prior to use.
4.1 Fluorescent UV/Condensation Apparatus, complying
1.4 This international standard was developed in accor-
with Practice G53.
dance with internationally recognized principles on standard-
4.2 Glossmeter, using an angle of reflection of 60°. The
ization established in the Decision on Principles for the
Development of International Standards, Guides and Recom- instrument and the reference standards shall conform to the
mendations issued by the World Trade Organization Technical requirements prescribed in Test Method D523.
Barriers to Trade (TBT) Committee.
4.3 Forced-air Oven.
4.4 Q Panel, approximately 7.5 by 15 cm aluminum.
2. Referenced Documents
4.5 Base Paint Coating—should be a red paint that gives
2.1 ASTM Standards:
100 % loss in gloss after being exposed to the test in this
D523 Test Method for Specular Gloss
practice.ApplythispainttothealuminumQpanelaccordingto
G53 Practice for Operating Light-and Water-Exposure Ap-
the instructions on the spray can.Allow paint coating to air dry
paratus (Fluorescent UV-Condensation Type) for Expo-
3 for 24 h followed by2hof drying in a forced-air oven at 50°C.
sure of Nonmetallic Materials (Withdrawn 2000)
4.6 Polishing and Application Cloth— shall be the same
size and type for each sample tested. Separate cloths shall be
used for each polish and for the application step and buffing
This practice is under the jurisdiction of ASTM Committee D21 on Polishes
step. Materials such as washed cheesecloth, rumple cloth,
and is the direct responsibility of Subcommittee D21.04 on Performance Tests.
Current edition approved Oct. 1, 2020. Published October 2020. Originally
flannel, cotton diaper cloth, and nonwoven fabrics are suitable
approved in 2001. Last previous edition approved in 2013 as D6625 - 13. DOI:
for this purpose. Felt or paper shall not
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