ASTM E937-93(2000)
(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
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 SI units are to be regarded as the standard. The values given in parentheses are for information only.
1.5 This standard does not purport to address all of the safety problems, 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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An American National Standard
Designation:E937–93 (Reapproved 2000)
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 E 937; 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 (e) indicates an editorial change since the last revision or reapproval.
1. Scope 3.2.2 sprayed fire-resistive materials—materials that are
sprayed onto substrates to provide fire-resistive protection of
1.1 This test method covers a procedure for measuring the
the substrates.
corrosion to steel induced by sprayed fire-resistive material.
1.2 These SFRMs include sprayed fibrous and cementitious
4. Summary of Test Method
materials applied directly in contact with the structural mem-
4.1 In this test method replicate panels of bare, shop-coated,
bers.
and galvanized steel are sprayed with SFRM and subjected to
1.3 This test method is applicable only to laboratory proce-
room temperature and humidity conditions and to 240 h of
dures.
conditioning in a temperature- and humidity-controlled cham-
1.4 The values stated in SI units are to be regarded as the
ber. Corrosion induced under these conditions is determined by
standard. The values given in parentheses are for information
weight loss of the sheets as related to sheets not so condi-
only.
tioned.
1.5 This standard does not purport to address all of the
safety concerns, if any, associated with its use. It is the
5. Significance and Use
responsibility of the user of this standard to establish appro-
5.1 It is the intent of this test method to determine relative
priate safety and health practices and determine the applica-
corrosive properties of direct applied SFRM that provides an
bility of regulatory limitations prior to use.
indication of serviceability. Satisfactory performance of SFRM
applied to structural members and assemblies depends upon its
2. Referenced Documents
ability to withstand the various influences that occur during the
2.1 ASTM Standards:
life of the structure, as well as upon its satisfactory perfor-
E 119 Test Methods for Fire Tests of Building Construction
2 mance under fire conditions.
and Materials
5.2 This test method evaluates the relative corrosion of steel
E 605 Test Methods for Thickness and Density of Sprayed
induced by SFRM and determines whether the presence of
Fire-Resistive Material (SFRM) Applied to Structural
3 SFRM increases, decreases, or has no effect on the corrosion
Members
3 characteristics of steel.
E 631 Terminology of Building Constructions
6. Apparatus
3. Terminology
6.1 Standard Temperature Humidity Cabinet, equipped to
3.1 Definitions—Definitions in this test method are in ac-
maintain the temperature at 35 6 1.7°C (95 6 3°F) and a
cordance with Terminology E 631.
relative humidity of 95 6 3 %. The cabinet and all accessories
3.2 Definitions of Terms Specific to This Standard:
shall be of a material that does not affect the corrosiveness of
3.2.1 corrosion—chemical reaction between a metal and its
the atmosphere in the cabinet.Additionally, all parts that come
environment that produces a deterioration of the metal and its
into contact with the test specimens shall be made of material
properties.
that will not cause electrolytic corrosion. Adequate circulation
of the atmosphere over the specimens shall be provided.
This test method is under the jurisdiction of ASTM Committee E06 on 6.2 Scale, having a capacity of 5 kg and a sensitivity of
Performance of Buildings and is the direct responsibility of Subcommittee E06.21
60.1 g.
on Serviceability.
Current edition approved March 15, 1993. Published May 1993. Originally
published as E 937 – 83. Last previous edition E 937 – 83.
2 4
Annual Book of ASTM Standards, Vol 04.07. Although “mass” is being determined, the term weight is used in this test
Annual Book of ASTM Standards, Vol 04.11. method as an accepted substitute.
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E937
6.3 Wire Brush, described as “cement mold brush” with 9.3 Apply the SFRM at a minimum thickness of 19 63mm
3 1
brass wire bristles 25 mm (1 in.) long mounted in a handle.The ( ⁄4 6 ⁄8 in.) to all sheets.
bristle section shall be 127 mm (5 in.) long by 19 mm ( ⁄4 in.)
9.4 Specimens I and III of Respective Sets:
wide.
9.4.1 Condition the specimens for 240 h at room tempera-
ture (20 6 5°C (68 6 9°F)) and relative humidity not greater
7. Materials
than 60 %. Record if a constant weight was reached.
7.1 This test method requires the application of SFRM in
9.4.2 Remove the SFRM, as well as the protective wax
accordance with manufacturer’s published instructions. The coating, from the steel sheet identified as I and III, from each
apparatus, materials, and procedures used to apply the SFRM
of the respective sets.
shall be representative of application in the field.
9.4.3 RemoveallsurfacerustfromIandIIIoftherespective
7.2 The density of the prepared sample shall be the same as
sets with the wire brush described in Section 6 and clean with
the density tested and reported during the Test Methods E 119
solvent as described in 8.2.
fire exposures or as required by the sponsor of the test.
9.4.4 Weigh sheets I and III of the respective sets to the
7.3 Determine the density and thickness of each laboratory-
nearest 0.1 g, and record as Ib and IIIb.
prepared specimen. Report in accordance with
...
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