ASTM F2832-11
(Guide)Standard Guide for Accelerated Corrosion Testing for Mechanical Fasteners
Standard Guide for Accelerated Corrosion Testing for Mechanical Fasteners
ABSTRACT
This guide covers test procedures for performing accelerated tests to evaluate relative corrosion resistance of various coatings applied to mechanical fasteners. Corrosion mechanisms such as general and crevice corrosion may be evaluated with this method. Test duration may be selected to achieve any desired level of corrosion exposure and provides a frame of reference to determine relative coating resistance to corrosion. Fasteners tightened to a desired tension and subjected to this test procedure may be evaluated to simulate a variety of service conditions. Without large amounts of accumulated field results, it is difficult to relate test duration or the number of test cycles to actual service life for a given application.
SCOPE
1.1 This guide covers test procedures for performing accelerated tests to evaluate relative corrosion resistance of various coatings applied to mechanical fasteners. Corrosion mechanisms such as general and crevice corrosion may be evaluated with this method. Test duration may be selected to achieve any desired level of corrosion exposure and provides a frame of reference to determine relative coating resistance to corrosion. Fasteners tightened to a desired tension and subjected to this test procedure may be evaluated to simulate a variety of service conditions. Without large amounts of accumulated field results, it is difficult to relate test duration or the number of test cycles to actual service life for a given application.
1.2 This standard is not intended to cover tests of driven fasteners such as nails, staples, screws and lag bolts.
1.3 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.
General Information
Standards Content (Sample)
NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.
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Designation: F2832 − 11
StandardGuide for
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Accelerated Corrosion Testing for Mechanical Fasteners
This standard is issued under the fixed designation F2832; 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.
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1. Scope 2.2 ASME Standard:
ASME B18.12 – Glossary of Terms for Mechanical Fasten-
1.1 This guide covers test procedures for performing accel-
ers
erated tests to evaluate relative corrosion resistance of various
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2.3 IFI Standards
coatings applied to mechanical fasteners. Corrosion mecha-
IFI-170 –Accelerated CorrosionTest for Mechanical Fasten-
nisms such as general and crevice corrosion may be evaluated
ers
with this method. Test duration may be selected to achieve any
desired level of corrosion exposure and provides a frame of
3. Terminology
reference to determine relative coating resistance to corrosion.
Fasteners tightened to a desired tension and subjected to this 3.1 Definitions for many of the terms used in this standard
testproceduremaybeevaluatedtosimulateavarietyofservice
are included in Terminology F1789 and ASME B18.12.
conditions.Withoutlargeamountsofaccumulatedfieldresults,
3.2 Definitions of Terms Specific to This Standard:
it is difficult to relate test duration or the number of test cycles
3.2.1 cycle—a series of events scheduled over a 24-hour
to actual service life for a given application.
period
1.2 This standard is not intended to cover tests of driven
3.2.2 phase—a test period which has elapsed for 8 cycles.
fasteners such as nails, staples, screws and lag bolts.
3.2.3 test duration—a series of cycles as defined in
1.3 This standard does not purport to address all of the
Section 4.
safety concerns, if any, associated with its use. It is the
responsibility of the user of this standard to establish appro-
4. Test Duration
priate safety and health practices and determine the applica-
4.1 Test duration is specified as A, B, C, D or E in
bility of regulatory limitations prior to use.
accordance with Table 1.
2. Referenced Documents 4.2 A typical cycle is shown in Table 2.
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2.1 ASTM Standards:
5. Apparatus and Materials
A480/A480M Specification for General Requirements for
5.1 Coupons 25.4 mm wide and 50.8 mm long having a
Flat-Rolled Stainless and Heat-Resisting Steel Plate,
thickness selected from Table 3 shall be used. Dimensional
Sheet, and Strip
tolerances of Specification A480/A480M shall apply. Coupons
B117 Practice for Operating Salt Spray (Fog) Apparatus
shall have a plain finish and be manufactured fromAISI–1008
B605 Specification for Electrodeposited Coatings of Tin-
steel grade. Coupons shall be included with fasteners to be
Nickel Alloy
tested to verify that uniform amounts of corrosion have been
D1193 Specification for Reagent Water
produced by tests. Refer to Fig. 1, Fig. 1 (a) and Fig. 1(b) and
F1470 Practice for Fastener Sampling for Specified Me-
Table 3. Inclusion of a metal loss coupon assists in making
chanical Properties and Performance Inspection
comparisons from one test to another and allows one to
F1789 Terminology for F16 Mechanical Fasteners
quantify a repeatable test.
G1 Practice for Preparing, Cleaning, and Evaluating Corro-
sion Test Specimens
5.2 A fog humidity cabinet shall be used in which salt mist
applications are coupled with high humidity and moderately
high temperature. Water fog or visible water droplets on parts
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This guide is under the jurisdiction ofASTM Committee F16 on Fasteners and
is the direct responsibility of Subcommittee F16.01 on Test Methods.
Current edition approved Feb. 1, 2011. Published February 2011. DOI: 10.1520/
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F2832–11. Available from American Society of Mechanical Engineers (ASME), ASME
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For referenced ASTM standards, visit the ASTM website, www.astm.org, or International Headquarters, Three Park Ave., New York, NY 10016-5990, http://
contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM www.asme.org.
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Standards volume information, refer to the standard’s Document Summary page on Available from Industrial Fasteners Institute (IFI), 6363 Oak Tree Blvd.
the ASTM website. Independence, OH 44131 http://www.indfast.org.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
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F2832 − 11
TABLE 1 Test Duration
7.4 Coupons to be used shall be cleaned with a methanol or
Test Duration Number of Cycles acetone solution and weighed prior to use. A coupon’s weight
A8
in 6 0.5-mg shall be recorded for comparison with its weight
B16
after testing in accordance with Table 2.
C40
D80
7.5 Coupons as
...
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