Standard Terminology Relating to Natural and Artificial Weathering Tests of Nonmetallic Materials

SCOPE
1.1 This terminology standard covers terms that relate to the durability testing of Nonmetallic Materials using natural and artificial weathering exposure techniques.
1.2 It is the intent of this terminology standard to include those weathering terms in wide use in ASTM for which standard definitions appear desirable.

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Historical
Publication Date
30-Nov-2006
Drafting Committee
Current Stage
Ref Project

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ASTM G113-06 - Standard Terminology Relating to Natural and Artificial Weathering Tests of Nonmetallic Materials
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NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.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: G 113 – 06
Standard Terminology
Relating to Natural and Artificial Weathering Tests of
1
Nonmetallic Materials
This standard is issued under the fixed designation G113; the number immediately following the designation indicates the year of
original adoption or, in the case of revision, the year of last revision.Anumber in parentheses indicates the year of last reapproval.A
superscript epsilon (e) indicates an editorial change since the last revision or reapproval.
1. Scope ISO 9370 Plastics -- Instrumental Determination of Radiant
Exposure in Weathering Tests -- General Guidance and
1.1 Thisterminologystandardcoverstermsthatrelatetothe
Basic Test Method
durability testing of Nonmetallic Materials using natural and
artificial weathering exposure techniques.
3. Significance and Use
1.2 It is the intent of this terminology standard to include
3.1 This terminology is not intended to supersede the
those weathering terms in wide use in ASTM for which
requirements of similar definitions in certain other documents,
standard definitions appear desirable.
but is intended to provide a listing of terms that are in current
2. Referenced Documents widespread usage, and their context in relation to weathering.
2
2.1 ASTM Standards:
4. Terminology
D9 Terminology Relating to Wood and Wood-Based Prod-
4.1 Definitions:
ucts
E41 Terminology Relating To Conditioning
accelerated outdoor weathering , n—outdoor weathering
E772 Terminology Relating to Solar Energy Conversion
using the sun as the source of irradiance, and where the rate
E973 Test Method for Determination of the Spectral Mis-
of deterioration is accelerated over that of the in-service
match Parameter Between a Photovoltaic Device and a
exposure position increasing one or more of the influencing
Photovoltaic Reference Cell
parameters.
G84 Practice for Measurement of Time-of-Wetness on
acceleration factor, n—the ratio of exposure time required to
SurfacesExposedtoWettingConditionsasinAtmospheric
produce a specified amount of change in a material by one
Corrosion Testing
exposure test divided by the exposure time required to
G90 Practice for Performing Accelerated Outdoor Weath-
produce the same change by another exposure test.
ering of Nonmetallic Materials Using Concentrated Natu-
DISCUSSION—Acceleration factors must be used with great caution
ral Sunlight
because they vary between materials (including different formulations
3
2.2 AATCC Method:
of the same material) and are strongly dependent on the exposure
16 Colorfastness to Light
conditionsandvariabilityofboththenaturalandlaboratoryaccelerated
4
2.3 ANSI Standards:
exposures.Accelerationfactorsmayalsovarydependingonthelevelof
ANSI/NCSL Z540-2-1997 American National Standard for material property change used to determine the acceleration factor. Do
not ratio irradiance in laboratory accelerated tests to irradiance in
Expressing Uncertainty—U.S. Guide to the Expression of
outdoorexposures,oruseequivalentradiantexposurestoestimatetime
Uncertainty in Measurement
to fail in outdoor exposures. These calculations ignore differences in
temperature and moisture between the accelerated test and exterior
exposures,andinthespectralpowerdistributionsofthelaboratorylight
1
source and sunlight.
This terminology is under the jurisdiction of ASTM Committee G03 on
Weathering and Durability and is the direct responsibility of Subcommittee G03.92
actinic radiation, n—the spectral region(s) of a light source
on Terminology.
Current edition approved Dec. 1, 2006. Published January 2007. Originally responsibleforthephotodegradationofaparticularmaterial.
approved in 1992. Last previous edition approved in 2005 as G113–05.
ambient temperature, n—the existing temperature of the air
2
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
or of an object in thermal equilibrium with the surrounding
contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
atmosphere.
Standards volume information, refer to the standard’s Document Summary page on
the ASTM website.
azimuthangle, n—anangleofaplanetothehorizonmeasured
3
Available from American Association of Textile Chemists and Colorists, P.O.
clockwise to the object.
Box 12215, Research Triangle Park, NC 27709.
4
backed exposure, n—a technique of weathering in which the
Available from National Conference of Standards Laboratories, 1800 30th St.,
Suite 305B, Boulder, CO 80301. test specimens being exposed are mounted onto a solid
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.
1

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G113–06
backingmaterial,ofsufficientstrengthtoholdthespecimen. daylight , n—as used in weathering, the term equivalent to
When the specimen and the backing are in direct contact the “sunlight”. It r
...

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