ASTM D7376-07
(Practice)Standard Practice for Outdoor Evaluation of Wet Stack Storage Conditions on Coil-Coated Metals
Standard Practice for Outdoor Evaluation of Wet Stack Storage Conditions on Coil-Coated Metals
SIGNIFICANCE AND USE
This practice provides for periodic testing to compare the relative performance of specific coatings, substrates, and/or pretreatments used on coil-coated metal for resistance to wet conditions during storage.
When performed in south Florida, this practice gives accelerated corrosion and blistering results relative to other locations within the continental United States.
This practice allows comparison of different coatings, substrates, and pretreatments when they are tested at the same time. The results must be considered relative and do not indicate absolute performance.
Because the outdoor environment shows year-to-year climatological, seasonal, and geographic variation, the absolute amount of degradation based on corrosion and blistering may vary (see Practice G 7).
Temperature, rain, and humidity are important factors in wet stack corrosion. Corrosion and blistering will accelerate with increased temperature. The preferred test location is south of 27°N latitude in Florida. Other locations may be used, but differences in temperature and moisture must be considered, and the amount of corrosion and blistering are expected to vary considerably with climate. Test sites must have the instrumentation to measure and record ambient temperature and rainfall as in Practice G 7.
This practice is not meant to support the field storage of coil-coated metal in any way other than what is recommended by the manufacturer.
SCOPE
1.1 This procedure describes the practice for determining relative performance of coil-coated metal in an outdoor wet stack testing environment.
1.2 The purpose of this test is to evaluate relative wet stack corrosion resistance and blistering. Substrates, pretreatments, primers, topcoats, and backers may be evaluated.
1.3 This test simulates coil or stacked building panel bundle storage at a job site in wet outdoor conditions. The results from panels tested during the same time period may be used to compare products as an indicator of actual field performance. Environments with higher temperature and moisture levels accelerate degradation.
1.4 The values stated in SI units are to be regarded as the standard. The values given in parentheses are for information only.
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.
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Standards Content (Sample)
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Designation:D7376–07
Standard Practice for
Outdoor Evaluation of Wet Stack Storage Conditions on
Coil-Coated Metals
This standard is issued under the fixed designation D7376; 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 D714 Test Method for Evaluating Degree of Blistering of
Paints
1.1 This procedure describes the practice for determining
D1654 Test Method for Evaluation of Painted or Coated
relative performance of coil-coated metal in an outdoor wet
Specimens Subjected to Corrosive Environments
stack testing environment.
G7 Practice forAtmospheric Environmental Exposure Test-
1.2 The purpose of this test is to evaluate relative wet stack
ing of Nonmetallic Materials
corrosion resistance and blistering. Substrates, pretreatments,
primers, topcoats, and backers may be evaluated.
3. Summary of Practice
1.3 This test simulates coil or stacked building panel bundle
3.1 This practice is for the evaluation of relative wet stack
storage at a job site in wet outdoor conditions.The results from
corrosion resistance and blistering of coil-coated metal. The
panels tested during the same time period may be used to
test is to be conducted in an outdoor environment with
compare products as an indicator of actual field performance.
coil-coated panels placed on a flat surface while allowing
Environments with higher temperature and moisture levels
exposure to environmental conditions such as rain, dew,
accelerate degradation.
humidity, and high temperatures.
1.4 The values stated in SI units are to be regarded as the
3.2 Panels are evaluated periodically for corrosion and
standard. The values given in parentheses are for information
blistering as specified in 6.7.
only.
1.5 This standard does not purport to address all of the
4. Significance and Use
safety concerns, if any, associated with its use. It is the
4.1 This practice provides for periodic testing to compare
responsibility of the user of this standard to establish appro-
the relative performance of specific coatings, substrates, and/or
priate safety and health practices and determine the applica-
pretreatments used on coil-coated metal for resistance to wet
bility of regulatory limitations prior to use.
conditions during storage.
4.2 When performed in south Florida, this practice gives
2. Referenced Documents
2 accelerated corrosion and blistering results relative to other
2.1 ASTM Standards:
locations within the continental United States.
D610 Practice for Evaluating Degree of Rusting on Painted
4.3 This practice allows comparison of different coatings,
Steel Surfaces
substrates, and pretreatments when they are tested at the same
time. The results must be considered relative and do not
indicate absolute performance.
This practice is under the jurisdiction of ASTM Committee D01 on Paint and
4.4 Because the outdoor environment shows year-to-year
Related Coatings, Materials, and Applications and is the direct responsibility of
climatological,seasonal,andgeographicvariation,theabsolute
Subcommittee D01.53 on Coil Coated Metal.
amount of degradation based on corrosion and blistering may
Current edition approved July 1, 2007. Published July 2007. DOI: 10.1520/
D7376-07.
vary (see Practice G7).
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
4.5 Temperature, rain, and humidity are important factors in
contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
wet stack corrosion. Corrosion and blistering will accelerate
Standards volume information, refer to the standard’s Document Summary page on
the ASTM website. with increased temperature. The preferred test location is south
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D7376–07
of 27°N latitude in Florida. Other locations may be used, but 6.3 It is recommended that a minimum of two extra panels
differences in temperature and moisture must be considered, be placed at the top and bottom of the stack to act as a barrier
and the amount of corrosion and blistering are expected to vary to any influences from the wood or water accumulation.
considerably with climate. Test sites must have the instrumen-
6.4 The test panel numbers shall be recorded along with
tation to measure and record ambient temperature and rainfall
information such as coater, paint code, substrate, primer,
as in Practice G7.
pretreatment, and date of test initiation.
4.6 This practice is not meant to support the field storage of
6.5 The test panels shall be stacked on top of one another
coil-coated metal in any way other than what is recommended
with the convex side facing upward against the backer of a
by the manufactu
...
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