ASTM E937/E937M-93(2015)e1
(Test Method)Standard Test Method for Corrosion of Steel by Sprayed Fire-Resistive Material (SFRM) Applied to Structural Members
Standard Test Method for Corrosion of Steel by Sprayed Fire-Resistive Material (SFRM) Applied to Structural Members
SIGNIFICANCE AND USE
5.1 It is the intent of this test method to determine relative corrosive properties of direct applied SFRM that provides an indication of serviceability. Satisfactory performance of SFRM applied to structural members and assemblies depends upon its ability to withstand the various influences that occur during the life of the structure, as well as upon its satisfactory performance under fire conditions.
5.2 This test method evaluates the relative corrosion of steel induced by SFRM and determines whether the presence of SFRM increases, decreases, or has no effect on the corrosion characteristics of steel.
SCOPE
1.1 This test method covers a procedure for measuring the corrosion to steel induced by sprayed fire-resistive material.
1.2 These SFRMs include sprayed fibrous and cementitious materials applied directly in contact with the structural members.
1.3 This test method is applicable only to laboratory procedures.
1.4 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.
1.5 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 and health practices and determine the applicability of regulatory limitations prior to use.
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´1
Designation: E937/E937M − 93 (Reapproved 2015)
Standard Test Method for
Corrosion of Steel by Sprayed Fire-Resistive Material
(SFRM) Applied to Structural Members
This standard is issued under the fixed designation E937/E937M; 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.
ε NOTE—Designation was changed to dual and units information was corrected editorially in August 2015.
1. Scope 3. Terminology
3.1 Definitions—Definitions in this test method are in ac-
1.1 This test method covers a procedure for measuring the
cordance with Terminology E631.
corrosion to steel induced by sprayed fire-resistive material.
3.2 Definitions of Terms Specific to This Standard:
1.2 These SFRMs include sprayed fibrous and cementitious
3.2.1 corrosion—chemical reaction between a metal and its
materials applied directly in contact with the structural mem-
environment that produces a deterioration of the metal and its
bers.
properties.
1.3 This test method is applicable only to laboratory proce-
3.2.2 sprayed fire-resistive materials—materials that are
dures.
sprayed onto substrates to provide fire-resistive protection of
the substrates.
1.4 The values stated in either SI units or inch-pound units
are to be regarded separately as standard. The values stated in
4. Summary of Test Method
each system may not be exact equivalents; therefore, each
4.1 In this test method replicate panels of bare, shop-coated,
system shall be used independently of the other. Combining
and galvanized steel are sprayed with SFRM and subjected to
values from the two systems may result in non-conformance
room temperature and humidity conditions and to 240 h of
with the standard.
conditioning in a temperature- and humidity-controlled cham-
1.5 This standard does not purport to address all of the
ber. Corrosion induced under these conditions is determined by
safety concerns, if any, associated with its use. It is the
weight loss of the sheets as related to sheets not so condi-
responsibility of the user of this standard to establish appro-
tioned.
priate safety and health practices and determine the applica-
bility of regulatory limitations prior to use.
5. Significance and Use
5.1 It is the intent of this test method to determine relative
2. Referenced Documents
corrosive properties of direct applied SFRM that provides an
2.1 ASTM Standards:
indication of serviceability. Satisfactory performance of SFRM
E119 Test Methods for Fire Tests of Building Construction
applied to structural members and assemblies depends upon its
and Materials
ability to withstand the various influences that occur during the
E605/E605M Test Methods for Thickness and Density of
life of the structure, as well as upon its satisfactory perfor-
Sprayed Fire-Resistive Material (SFRM) Applied to
mance under fire conditions.
Structural Members
5.2 This test method evaluates the relative corrosion of steel
E631 Terminology of Building Constructions
induced by SFRM and determines whether the presence of
SFRM increases, decreases, or has no effect on the corrosion
characteristics of steel.
This test method is under the jurisdiction of ASTM Committee E06 on
Performance of Buildings and is the direct responsibility of Subcommittee E06.21
6. Apparatus
on Serviceability.
Current edition approved Aug. 1, 2015. Published August 2015. Originally
6.1 Standard Temperature Humidity Cabinet, equipped to
approved in 1983. Last previous edition approved in 2011 as E937 – 93 (2011).
maintain the temperature at 35 6 1.7°C [95 6 3°F] and a
DOI: 10.1520/E0937_E0937M-93R15E01.
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
Standards volume information, refer to the standard’s Document Summary page on Although “mass” is being determined, the term weight is used in this test
the ASTM website. method as an accepted substitute.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
´1
E937/E937M − 93 (2015)
TABLE 1 Sample Weights
relative humidity of 95 6 3 %. The cabinet and all accessories
shall be of a material that does not affect the corrosiveness of Bare Shot-Coated Galvanized
2 2 2
the atmosphere in the cabinet.Additionally, all parts that come I= Ia=g⁄mm Ia=g⁄mm Ia=g⁄mm
2 2 2
Specimens having SFRM, Ib=g⁄mm Ib=g⁄mm Ib=g⁄mm
into contact with the test specimens shall be made of material
conditioned at room
that will not cause electrolytic corrosion. Adequate circulation
temperature (9.4).
2 2 2
II = IIa = g ⁄mm IIa=g⁄mm IIa=g⁄mm
of the atmosphere over the specimens shall be provided.
2 2 2
Specimens having SFRM, IIb=g⁄mm IIb=g⁄mm IIb=g⁄mm
6.2 Scale, having a capacity of 5 kg and a sensitivity of
conditioned for 240 h at
35 ± 1.7°C (9.5).
60.1 g.
2 2 2
III = IIIa = g ⁄mm IIIa = g ⁄mm IIIa = g ⁄mm
2 2 2
6.3 Wire Brush, described as “cement mold brush” with Specimens having SFRM, IIIb = g ⁄mm IIIb = g ⁄mm IIIb = g ⁄mm
conditioned at room
brasswirebristles25 mm[1 in.]longmountedinahandle.The
temperature (9.4).
bristle section shall be 127 mm [5 in.] long by 19 mm [ ⁄4 in.] 2 2 2
IV= IVa=g⁄mm IVa=g⁄mm IVa=g⁄mm
2 2 2
Specimens having SFRM, IVb=g⁄mm IVb=g⁄mm IVb=g⁄mm
wide.
conditioned for 240 h at
35 ± 1.7°C (9.5).
7. Materials
7.1 This test method requires the application of SFRM in
accordance with manufacturer’s published instructions. The
9.4.2 Remove the SFRM, as well as the protective wax
apparatus, materials, and procedures used to apply the SFRM
coating, from the steel sheet identified as I and III, from each
shall be representative of application in the field.
of the respective sets.
7.2 The density of the prepared sample shall be the same as
9.4.3 RemoveallsurfacerustfromIandIII
...
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.
´1
Designation: E937 − 93 (Reapproved 2011) E937/E937M − 93 (Reapproved 2015)
Standard Test Method for
Corrosion of Steel by Sprayed Fire-Resistive Material
(SFRM) Applied to Structural Members
This standard is issued under the fixed designation E937;E937/E937M; 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.
ε NOTE—Designation was changed to dual and units information was corrected editorially in August 2015.
1. Scope
1.1 This test method covers a procedure for measuring the corrosion to steel induced by sprayed fire-resistive material.
1.2 These SFRMs include sprayed fibrous and cementitious materials applied directly in contact with the structural members.
1.3 This test method is applicable only to laboratory procedures.
1.4 The values stated in either SI units or inch-pound units are to be regarded separately as the standard. The values given in
parentheses are mathematical conversions to inch-pound units that are provided for information only and are not considered 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.
1.5 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 and health practices and determine the applicability of regulatory
limitations prior to use.
2. Referenced Documents
2.1 ASTM Standards:
E119 Test Methods for Fire Tests of Building Construction and Materials
E605E605/E605M Test Methods for Thickness and Density of Sprayed Fire-Resistive Material (SFRM) Applied to Structural
Members
E631 Terminology of Building Constructions
3. Terminology
3.1 Definitions—Definitions in this test method are in accordance with Terminology E631.
3.2 Definitions of Terms Specific to This Standard:
3.2.1 corrosion—chemical reaction between a metal and its environment that produces a deterioration of the metal and its
properties.
3.2.2 sprayed fire-resistive materials—materials that are sprayed onto substrates to provide fire-resistive protection of the
substrates.
4. Summary of Test Method
4.1 In this test method replicate panels of bare, shop-coated, and galvanized steel are sprayed with SFRM and subjected to room
temperature and humidity conditions and to 240 h of conditioning in a temperature- and humidity-controlled chamber. Corrosion
induced under these conditions is determined by weight loss of the sheets as related to sheets not so conditioned.
This test method is under the jurisdiction of ASTM Committee E06 on Performance of Buildings and is the direct responsibility of Subcommittee E06.21 on
Serviceability.
Current edition approved April 1, 2011Aug. 1, 2015. Published May 2011August 2015. Originally approved in 1983. Last previous edition approved in 20052011 as
E937 – 93 (2005).(2011). DOI: 10.1520/E0937-93R11.10.1520/E0937_E0937M-93R15E01.
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 Standards
volume information, refer to the standard’s Document Summary page on the ASTM website.
Although “mass” is being determined, the term weight is used in this test method as an accepted substitute.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
´1
E937/E937M − 93 (2015)
5. Significance and Use
5.1 It is the intent of this test method to determine relative corrosive properties of direct applied SFRM that provides an
indication of serviceability. Satisfactory performance of SFRM applied to structural members and assemblies depends upon its
ability to withstand the various influences that occur during the life of the structure, as well as upon its satisfactory performance
under fire conditions.
5.2 This test method evaluates the relative corrosion of steel induced by SFRM and determines whether the presence of SFRM
increases, decreases, or has no effect on the corrosion characteristics of steel.
6. Apparatus
6.1 Standard Temperature Humidity Cabinet, equipped to maintain the temperature at 35 6 1.7°C (95 6 3°F)[95 6 3°F] and a
relative humidity of 95 6 3 %. The cabinet and all accessories shall be of a material that does not affect the corrosiveness of the
atmosphere in the cabinet. Additionally, all parts that come into contact with the test specimens shall be made of material that will
not cause electrolytic corrosion. Adequate circulation of the atmosphere over the specimens shall be provided.
6.2 Scale, having a capacity of 5 kg and a sensitivity of 60.1 g.
6.3 Wire Brush, described as “cement mold brush” with brass wire bristles 25 mm (1 in.)[1 in.] long mounted in a handle. The
bristle section shall be 127 mm (5 in.)[5 in.] long by 19 mm ([ ⁄4 in.)in.] wide.
7. Materials
7.1 This test method requires the application of SFRM in accordance with manufacturer’s published instructions. The apparatus,
materials, and procedures used to apply the SFRM shall be representative of application in the field.
7.2 The density of the prepared sample shall be the same as the density tested and reported during the Test Methods E119 fire
exposures or as required by the sponsor of the test.
7.3 Determine the density and thickness of each laboratory-prepared specimen. Report in accordance with Test Methods
E605E605/E605M.
7.4 Steel sheets shall be 200 mm by 200 mm (8 in.[8 in. by 8 in.)8 in.] by minimum 12 gage and shall be: bare steel—
A36 grade, galvanized steel—G60 grade, and shop-coated—A36 grade steel coated with iron oxide alkyd shop coat primer.
8. Laboratory Test Specimens
8.1 The three sets of specimens shall consist of four sheets each, in the following categories: bare, shop-coated, and galvanized
steel.
8.2 The steel sheets shall be free of all surface rust. Wash the metal specimens with analytical grade trichlorethylene to remove
any oil or grease. Dry at room temperature. For test purposes of this test method, the duplicate sets of steel sheets are referred to
as f
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