ASTM D7893-13(2018)
(Guide)Standard Guide for Corrosion Test Panel Preparation, Testing, and Rating of Coil-Coated Building Products
Standard Guide for Corrosion Test Panel Preparation, Testing, and Rating of Coil-Coated Building Products
SIGNIFICANCE AND USE
5.1 Coil-coated metals are subjected to a wide range of environmental stresses. Corrosion at cut edges, damage points, and fabricated areas can occur and lead to premature failure. Proper preparation and rating of test panels produces meaningful test results that allows comparisons between metal substrates and their pretreatments as well as between coating systems.
5.2 Laboratory-prepared test panels give a relative comparison of the substrates and coating systems under test, but may not duplicate all of the stresses imposed on manufactured components. Validation of results on a manufactured product is recommended.
5.3 Laboratory accelerated corrosion testing is useful in evaluating relative performance of new and existing metal coatings, pretreatments, and paints. It is up to the participating parties to agree on the significance of these tests to actual use.
SCOPE
1.1 This guide has been written specifically for coil-coated metal building products.
1.2 This guide applies to preparation, testing, and rating of line-coated and laboratory-coated test panels for the purpose of comparing and ranking the panels for corrosion resistance and other related properties.
1.3 Testing may include accelerated laboratory corrosion tests and outdoor exposure tests.
1.4 The values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard.
1.5 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.
1.6 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
Relations
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: D7893 − 13 (Reapproved 2018)
Standard Guide for
Corrosion Test Panel Preparation, Testing, and Rating of
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Coil-Coated Building Products
This standard is issued under the fixed designation D7893; 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 D870 Practice for Testing Water Resistance of Coatings
Using Water Immersion
1.1 This guide has been written specifically for coil-coated
D1654 Test Method for Evaluation of Painted or Coated
metal building products.
Specimens Subjected to Corrosive Environments
1.2 This guide applies to preparation, testing, and rating of
D1735 Practice for Testing Water Resistance of Coatings
line-coated and laboratory-coated test panels for the purpose of
Using Water Fog Apparatus
comparing and ranking the panels for corrosion resistance and
D2247 Practice for Testing Water Resistance of Coatings in
other related properties.
100 % Relative Humidity
1.3 Testing may include accelerated laboratory corrosion D2803 Guide for Testing Filiform Corrosion Resistance of
Organic Coatings on Metal
tests and outdoor exposure tests.
D3359 Test Methods for Rating Adhesion by Tape Test
1.4 The values stated in SI units are to be regarded as
D4138 Practices for Measurement of Dry Film Thickness of
standard. No other units of measurement are included in this
Protective Coating Systems by Destructive, Cross-
standard.
Sectioning Means
1.5 This standard does not purport to address all of the
D4585 Practice for Testing Water Resistance of Coatings
safety concerns, if any, associated with its use. It is the
Using Controlled Condensation
responsibility of the user of this standard to establish appro-
D5796 TestMethodforMeasurementofDryFilmThickness
priate safety, health, and environmental practices and deter-
of Thin-Film Coil-Coated Systems by Destructive Means
mine the applicability of regulatory limitations prior to use.
Using a Boring Device
1.6 This international standard was developed in accor-
D5894 Practice for Cyclic Salt Fog/UV Exposure of Painted
dance with internationally recognized principles on standard-
Metal, (Alternating Exposures in a Fog/Dry Cabinet and a
ization established in the Decision on Principles for the
UV/Condensation Cabinet)
Development of International Standards, Guides and Recom-
D7091 Practice for Nondestructive Measurement of Dry
mendations issued by the World Trade Organization Technical
Film Thickness of Nonmagnetic Coatings Applied to
Barriers to Trade (TBT) Committee.
Ferrous Metals and Nonmagnetic, Nonconductive Coat-
ings Applied to Non-Ferrous Metals
2. Referenced Documents
G7 Practice for Atmospheric Environmental Exposure Test-
2
2.1 ASTM Standards:
ing of Nonmetallic Materials
B117 Practice for Operating Salt Spray (Fog) Apparatus
G85 Practice for Modified Salt Spray (Fog) Testing
D610 Practice for Evaluating Degree of Rusting on Painted
G87 Practice for Conducting Moist SO Tests
2
Steel Surfaces
G169 Guide for Application of Basic Statistical Methods to
D714 Test Method for Evaluating Degree of Blistering of
Weathering Tests
3
Paints
2.2 SAE Standards:
J2334 Laboratory Cyclic Corrosion Test
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This guide is under the jurisdiction of ASTM Committee D01 on Paint and
3. Terminology
Related Coatings, Materials, and Applications and is the direct responsibility of
3.1 Definitions:
Subcommittee D01.53 on Coil Coated Metal.
Current edition approved June 1, 2018. Published June 2018. Originally
3.1.1 test panel, n—a representative specimen of metal
approved in 2013. Last previous edition approved in 2013 as D7893 – 13. DOI:
substrate, coated with a coating system for evaluation, and
10.1520/D7893-13R18.
2
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
3
Standards volume information, refer to the standard’s Document Summary page on Available from SAE International (SAE), 400 Commonwealth Dr.,Warrendale,
the ASTM website. PA 15096-0001, http://www.sae.org.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
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D7893 − 13 (2018)
prepared in a way that allows measurement of environmental other configurations. The anticipated corrosion creep distance
degradation, especially corrosion, for system performance would also influence test panel size.
comparisons and ranking.
6.4 The
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