ASTM D6294/D6294M-98(2009)e1
(Test Method)Standard Test Method for Corrosion Resistance of Ferrous Metal Fastener Assemblies Used in Roofing and Waterproofing
Standard Test Method for Corrosion Resistance of Ferrous Metal Fastener Assemblies Used in Roofing and Waterproofing
SIGNIFICANCE AND USE
It is important to evaluate the corrosion resistance of ferrous metal components used in low-slope roofing and waterproofing because they provide integrity and securement of other system components, such as insulation and membranes. Corrosion of ferrous metal components may result in their early deterioration and may lead to roofing or waterproofing system failure.
Results from testing ferrous metal components in an acidic atmosphere serve as an indication of the relative corrosion resistance of such components, coated or uncoated, to the environment of the test chamber. The results are not to be construed as a general guideline to the corrosion resistance of such components in other environments or in usage that may be conducive to corrosion.
Moist air containing sulfur dioxide quickly produces easily visible corrosion on many ferrous metals. It is therefore a test medium suited to detect pores or other sources of weakness in protective barrier coatings.
This test method applies primarily to evaluating the effectiveness of barrier coatings to provide general corrosion protection under test conditions. It is not intended to evaluate the resistance of the components to specific corrosion mechanisms such as crevice, galvanic, or stress corrosion.
This test method does not address abrasion resistance of barrier coatings when the fasteners are driven through above roof deck components, such as an existing built-up roof or insulations, or both.
Only the above deck portion of fasteners subjected to this test method is evaluated.
SCOPE
1.1 This test method covers components of ferrous metal fastener assemblies, excluding those of stainless steel, such as fasteners, stress plates, and batten bars used in low slope roofing and waterproofing, to a sulfurous acid environment. This test method evaluates relative corrosion resistance of the components by determination of percentage of rust or white rust.
1.2 The components may or may not have a surface treatment applied.
1.3 A limiting factor is the subjectiveness when determining actual percentage of rust or white rust corrosion.
1.4 Other performance characteristics of ferrous metal components such as abrasion resistance of barrier coatings are not evaluated in this method.
1.5 This test method was developed based on Practice G87.
1.6 The values stated in either SI units or inch-pound units are to be regarded separately as standard. The values stated in each system may not be exact equivalents; therefore, each system shall be used independently of the other. Combining values from the two systems may result in non-conformance with the standard.
1.7 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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´1
Designation:D6294/D6294M −98(Reapproved 2009)
Standard Test Method for
Corrosion Resistance of Ferrous Metal Fastener Assemblies
Used in Roofing and Waterproofing
This standard is issued under the fixed designation D6294/D6294M; 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.
´ NOTE—Editorially corrected the units of measure in December 2009.
1. Scope 2. Referenced Documents
1.1 This test method covers components of ferrous metal 2.1 ASTM Standards:
fastener assemblies, excluding those of stainless steel, such as D16 TerminologyforPaint,RelatedCoatings,Materials,and
fasteners, stress plates, and batten bars used in low slope Applications
roofing and waterproofing, to a sulfurous acid environment. D1079 Terminology Relating to Roofing and Waterproofing
This test method evaluates relative corrosion resistance of the G15 Terminology Relating to Corrosion and Corrosion Test-
components by determination of percentage of rust or white ing
rust. G87 Practice for Conducting Moist SO Tests
1.2 The components may or may not have a surface treat-
3. Terminology
ment applied.
3.1 Definitions:
1.3 Alimiting factor is the subjectiveness when determining
3.1.1 For definitions of terms used in this test method, see
actual percentage of rust or white rust corrosion.
Terminology D1079, G15, and D16.
1.4 Other performance characteristics of ferrous metal com-
3.2 Definitions of Terms Specific to This Standard:
ponents such as abrasion resistance of barrier coatings are not
3.2.1 barrier—any material limiting passage through itself
evaluated in this method.
of solids, liquids, semi-solids, gases, vapors, or forms of
energy such as ultraviolet light.
1.5 This test method was developed based on Practice G87.
3.2.2 surface treatment—a process by which the surface of
1.6 The values stated in either SI units or inch-pound units
the ferrous metal component is treated with a barrier coating to
are to be regarded separately as standard. The values stated in
inhibit corrosion. Examples of barrier coatings for ferrous
each system may not be exact equivalents; therefore, each
metal components include galvanization, zinc plating with or
system shall be used independently of the other. Combining
without yellow or clear chromate sealer, cadmium, mechanical
values from the two systems may result in non-conformance
zinc plating and organic or inorganic polymers.
with the standard.
1.7 This standard does not purport to address all of the
4. Summary of Test Method
safety concerns, if any, associated with its use. It is the
4.1 This test method exposes ferrous metal specimens to 15
responsibility of the user of this standard to establish appro-
or 30 (24) h cycles consisting of the following:
priate safety and health practices and determine the applica-
4.1.1 Eight (8) h exposure to the sulfur dioxide atmosphere
bility of regulatory limitations prior to use.
in a closed chamber.
4.1.2 An intermediate step of rinsing with distilled water,
and
This test method is under the jurisdiction ofASTM Committee D08 on Roofing
and Waterproofing and is the direct responsibility of Subcommittee D08.20 on
Roofing Membrane Systems. For referenced ASTM standards, visit the ASTM website, www.astm.org, or
Current edition approved Dec. 1, 2009. Published December 2009. Originally contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
approved in 1998. Last previous edition approved in 1998 as D6294 – 98. DOI: Standards volume information, refer to the standard’s Document Summary page on
10.1520/D6294_D6294M-98R09E01. the ASTM website.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
´1
D6294/D6294M−98 (2009)
4.1.3 Sixteen (16) h of drying under vented conditions at 7.1 The reagents, (that is, sulfur dioxide and water), their
controlled temperature and humidity. purity,andthemeansforintroducingthesulfurdioxideintothe
test chamber shall be in accordance with Section 7 of Practice
4.2 After drying, the test specimens are visually examined
G87.
to evaluate the percentage of rust or white rust that formed on
the surface.
8. Test Specimen
4.3 The total surface area of the components exposed in the
8.1 Select the number of test specimens such that the total
2 2
chamber is 0.5 6 0.1 m [775 6 155 in. ].
combined exposed surface area of the specimens at any one
2 2
time shall be 0.5 6 0.1 m [755 6 155 in. ].
5. Significance and Use
8.2 It is allowable to mix the type of ferrous metal compo-
5.1 It is important to evaluate the corrosion resistance of
nents (that is, fasteners, stress plates, an batten bars) in the test
ferrous metal components used in low-slope roofing and
chamber, provided that the different components do not have
waterproofing because they provide integrity and securement
vastly different resistance to corrosion under test conditions.
of other system components, such as insulation and mem-
The different types of components that may be evaluated in the
branes. Corrosion of ferrous metal components may result in
chamber simultaneously are to be agreed upon between the
their early deterioration and may lead to roofing or waterproof-
laboratory and client requesting the test.
ing system failure.
NOTE 1—The laboratory may have to conduct preliminary cycling tests
5.2 Results from testing ferrous metal components in an
to estimate the relative resistance of each component.
acidic atmosphere serve as an indication of the relative
NOTE 2—Specimens may be produced by the laboratory showing 10,
corrosion resistance of such components, coated or uncoated,
15, 20, and 30 % rust or white rust surface corrosion to be used as controls
to the environment of the test chamber. The results are not to to aid in the test result evaluation in accordance with 10.1.3 and 11.1.6.
be construed as a general guideline to the corrosion resistance
8.3 To obtain quantitative corrosion-rate data, only ferrous
ofsuchcomponentsinotherenvironmentsorinusagethatmay
metal components with similar reactivities should be included
be conducive to corrosion.
in a test run.
5.3 Moist air containing sulfur dioxide quickly produces
8.4 Roof Fastener Test Specimens:
easily visible corrosion on many ferrous metals. It is therefore
8.4.1 Fastenersofanylengthmaybetestedaccordingtothis
a test medium suited to detect pores or other sources of
method.Thelengthistobeagreeduponbetweenthelaboratory
weakness in protective barrier coatings.
and client.
8.4.2 Roof fasteners are evaluated in this method in relation
5.4 This test method applies primarily to evaluating the
to deck materials into which they are expected to be installed
effectiveness of barrier coatings to provide general corrosion
in service. For purposes of this test method, these deck
protection under test conditions. It is not intended to evaluate
materials are structural concrete, lightweight insulating con-
the resistance of the components to specific corrosion mecha-
crete, cementitious wood fiber, gypsum, metal, and wood.
nisms such as crevice, galvanic, or stress corrosion.
Prepare the fastener test specimens as follows:
5.5 This test method does not address abrasion resistance of
8.4.3 Fasteners for Concrete Decks:
barrier coatings when the fasteners are driven through above
8.4.3.1 Use nominal 20.7 MPa [3000 lb/in ] 75 mm [3 in.]
roof deck components, such as an existing built-up roof or
minimumthicknessconcretedeckthathascuredaminimumof
insulations, or both.
28 days. Install the fastener, in accordance with the manufac-
5.6 Only the above deck portion of fasteners subjected to
ture’s specifications, a minimum of 25 mm [1 in.] 6 10 % into
this test method is evaluated.
the deck.
8.4.3.2 Use a separate hole location on the deck sample(s)
6. Apparatus
for each fastener.
8.4.4 Fasteners for Lightweight Insulating Concrete Decks:
6.1 The apparatus required for evaluating the corrosion
8.4.4.1 Use 75 mm [3 in.] minimum thickness nominal 480
resistanceofthecomponentsconsistsofatestchamber having
kg/m [30 pcf] lightweight insulating concrete deck that has
an internal capacity of 300 L [10.6 ft ], a supply of sulfur
cured a minimum 28 days. Install the fastener, in accordance
dioxide with metering device, specimen supports, provisions
with the manufacture’s specifications, a minimum of 25 mm [1
for heating the chamber, and necessary means of control. The
in.] 6 10 % into the deck.
size and detailed construction of the apparatus shall be in
8.4.4.2 Use a separate hole location on the concrete deck
accordance with Section 4 of Practice G87.
sample(s) for each fastener.
7. Reagents 8.4.5 Fasteners for Cementitious Wood Fiber Decks:
8.4.5.1 Use 75 mm [3 in.] minimum thickness cementitious
wood fiber deck. Install the fas
...
This document is not an ASTM standard and is intended only to provide the user of an ASTM standard an indication of what changes have been made to the previous version. Because
it may not be technically possible to adequately depict all changes accurately, ASTM recommends that users consult prior editions as appropriate. In all cases only the current version
of the standard as published by ASTM is to be considered the official document.
Designation:D6294–98 (Reapproved 2003) Designation: D6294/D6294M – 98
´1
(Reapproved 2009)
Standard Test Method for
Corrosion Resistance of Ferrous Metal Fastener Assemblies
Used in Roofing and Waterproofing
This standard is issued under the fixed designation D6294/D6294M; 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.
´ NOTE—Editorially corrected the units of measure in December 2009.
1. Scope
1.1 This test method covers components of ferrous metal fastener assemblies, excluding those of stainless steel, such as
fasteners, stress plates, and batten bars used in low slope roofing and waterproofing, to a sulfurous acid environment. This test
method evaluates relative corrosion resistance of the components by determination of percentage of rust or white rust.
1.2 The components may or may not have a surface treatment applied.
1.3 A limiting factor is the subjectiveness when determining actual percentage of rust or white rust corrosion.
1.4 Other performance characteristics of ferrous metal components such as abrasion resistance of barrier coatings are not
evaluated in this method.
1.5 This test method was developed based on Practice G87.
1.6The values stated in SI units are to be regarded as the standard. The inch-pound values given in parentheses may be
approximate, and are presented for information purposes.
1.6 The values stated in either SI units or inch-pound units are to be regarded separately as standard. The values stated in each
system may not be exact equivalents; therefore, each system shall be used independently of the other. Combining values from the
two systems may result in non-conformance with the standard.
1.7 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.
2. Referenced Documents
2.1 ASTM Standards:
D16 Terminology for Paint, Related Coatings, Materials, and Applications
D1079 Terminology Relating to Roofing and Waterproofing
G15 Terminology Relating to Corrosion and Corrosion Testing
G87 Practice for Conducting Moist SO Tests
3. Terminology
3.1 Definitions:
3.1.1 For definitions of terms used in this test method, see Terminology D1079, G15, and D16.
3.2 Definitions of Terms Specific to This Standard:
3.2.1 barrier—anymateriallimitingpassagethroughitselfofsolids,liquids,semi-solids,gases,vapors,orformsofenergysuch
as ultraviolet light.
3.2.2 surface treatment—a process by which the surface of the ferrous metal component is treated with a barrier coating to
inhibit corrosion. Examples of barrier coatings for ferrous metal components include galvanization, zinc plating with or without
yellow or clear chromate sealer, cadmium, mechanical zinc plating and organic or inorganic polymers.
This test method is under the jurisdiction ofASTM Committee D08 on Roofing and Waterproofing and is the direct responsibility of Subcommittee D08.20 on Roofing
Membrane Systems.
Current edition approved July 10, 2003.Dec. 1, 2009. Published July 2003.December 2009. Originally approved in 1998. Last previous edition approved in 1998 as
D6294 – 98. DOI: 10.1520/D6294_D6294M-98R039E01.
For referencedASTM standards, visit theASTM website, www.astm.org, or contactASTM Customer Service at service@astm.org. For Annual Book of ASTM Standards
, Vol 06.01.volume information, refer to the standard’s Document Summary page on the ASTM website.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.
´1
D6294/D6294M – 98 (2009)
4. Summary of Test Method
4.1 This test method exposes ferrous metal specimens to 15 or 30 (24) h cycles consisting of the following:
4.1.1 Eight (8) h exposure to the sulfur dioxide atmosphere in a closed chamber.
4.1.2 An intermediate step of rinsing with distilled water, and
4.1.3 Sixteen (16) h of drying under vented conditions at controlled temperature and humidity.
4.2 After drying, the test specimens are visually examined to evaluate the percentage of rust or white rust that formed on the
surface.
2 2
4.3 The total surface area of the components exposed in the chamber is 0.5 6 0.1 m (775[775 6 155 in. ). ].
5. Significance and Use
5.1 It is important to evaluate the corrosion resistance of ferrous metal components used in low-slope roofing and waterproofing
because they provide integrity and securement of other system components, such as insulation and membranes. Corrosion of
ferrous metal components may result in their early deterioration and may lead to roofing or waterproofing system failure.
5.2 Results from testing ferrous metal components in an acidic atmosphere serve as an indication of the relative corrosion
resistance of such components, coated or uncoated, to the environment of the test chamber. The results are not to be construed as
a general guideline to the corrosion resistance of such components in other environments or in usage that may be conducive to
corrosion.
5.3 Moist air containing sulfur dioxide quickly produces easily visible corrosion on many ferrous metals. It is therefore a test
medium suited to detect pores or other sources of weakness in protective barrier coatings.
5.4 This test method applies primarily to evaluating the effectiveness of barrier coatings to provide general corrosion protection
under test conditions. It is not intended to evaluate the resistance of the components to specific corrosion mechanisms such as
crevice, galvanic, or stress corrosion.
5.5 This test method does not address abrasion resistance of barrier coatings when the fasteners are driven through above roof
deck components, such as an existing built-up roof or insulations, or both.
5.6 Only the above deck portion of fasteners subjected to this test method is evaluated.
6. Apparatus
6.1 The apparatus required for evaluating the corrosion resistance of the components consists of a test chamber having an
internal capacity of 300 L (10.6[10.6 ft ),], a supply of sulfur dioxide with metering device, specimen supports, provisions for
heating the chamber, and necessary means of control. The size and detailed construction of the apparatus shall be in accordance
with Section 4 of Practice G87.
7. Reagents
7.1 The reagents, (that is, sulfur dioxide and water), their purity, and the means for introducing the sulfur dioxide into the test
chamber shall be in accordance with Section 7 of Practice G87.
8. Test Specimen
8.1 Selectthenumberoftestspecimenssuchthatthetotalcombinedexposedsurfaceareaofthespecimensatanyonetimeshall
2 2
be 0.5 6 0.1 m (755[755 6 155 in. ). ].
8.2 It is allowable to mix the type of ferrous metal components (that is, fasteners, stress plates, an batten bars) in the test
chamber, provided that the different components do not have vastly different resistance to corrosion under test conditions. The
different types of components that may be evaluated in the chamber simultaneously are to be agreed upon between the laboratory
and client requesting the test.
NOTE 1—The laboratory may have to conduct preliminary cycling tests to estimate the relative resistance of each component.
NOTE 2—Specimens may be produced by the laboratory showing 10, 15, 20, and 30 % rust or white rust surface corrosion to be used as controls to
aid in the test result evaluation in accordance with 10.1.3 and 11.1.6.
8.3 To obtain quantitative corrosion-rate data, only ferrous metal components with similar reactivities should be included in a
test run.
8.4 Roof Fastener Test Specimens:
8.4.1 Fasteners of any length may be tested according to this method. The length is to be agreed upon between the laboratory
and client.
8.4.2 Roof fasteners are evaluated in this method in relation to deck materials into which they are expected to be installed in
service. For purposes of this test method, these deck materials are structural concrete, lightweight insulating concrete, cementitious
wood fiber, gypsum, metal, and wood. Prepare the fastener test specimens as follows:
Annual Book of ASTM Standards, Vol 04.04.
The sole source of supply of the apparatus known to the committee at this time is MostAssociates, 114 Waters Edge Drive. Jupiter, FL33477, andAtotech USA, 20026
Progress Drive, Strongville, OH 44136. If you are aware of alternative suppliers, please provide this information to ASTM International Headquarters. Your comments will
receive careful consideration at a meeting of the responsible technical committee, which you may attend.
´1
D6294/D6294M – 98 (2009)
8.4.3 Fasteners for Concrete Decks:
8.4.3.1 Use nominal 20.7 MPa (3000[3000 lb/in )] 75 mm (3 in.)[3 in.] minimum thickness concrete deck that has cured a
minimum of 28 days. Install the fastener, in accordance with the manufacture’s specifi
...
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