ASTM D2809-04e2
(Test Method)Standard Test Method for Cavitation Corrosion and Erosion-Corrosion Characteristics of Aluminum Pumps With Engine Coolants
Standard Test Method for Cavitation Corrosion and Erosion-Corrosion Characteristics of Aluminum Pumps With Engine Coolants
SIGNIFICANCE AND USE
This test method can be used to distinguish between coolants that contribute to cavitation corrosion and erosion-corrosion of aluminum automotive water pumps and those that do not. It is not intended that a particular rating number, as determined from this test, will be equivalent to a certain number of miles in a vehicle test; however, limited correlation between bench and field service tests has been observed with single-phase coolants. Field tests under severe operating conditions should be conducted as the final test if the actual effect of the coolant on cavitation corrosion and erosion-corrosion is to be appraised. It is also possible, with proper control of the test variables, to determine the effect of pump design, materials of construction, and pump operating conditions on cavitation corrosion and erosion-corrosion damage.
SCOPE
1.1 This test method covers the evaluation of the cavitation corrosion and erosion-corrosion characteristics of aluminum automotive water pumps with coolants. Note 1During the development of this test method, it was found that results obtained when testing two-phase coolants did not correlate with results from field tests. Therefore, the test method cannot be recommended as being a significant test for determining cavitation effects of two-phase coolants.
1.2 The values stated in SI units are to be regarded as the standard. The values given in parentheses are for information only.
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. Specific warning statements are given in .
General Information
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Standards Content (Sample)
NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.
Contact ASTM International (www.astm.org) for the latest information.
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Designation:D2809–04
Standard Test Method for
Cavitation Corrosion and Erosion-Corrosion Characteristics
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of Aluminum Pumps With Engine Coolants
This standard is issued under the fixed designation D2809; 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
´ NOTE—Footnote 3 was updated editorially in August 2005.
2
´ NOTE—Adjunct references were corrected editorially in April 2006.
A,B
TABLE 1 Rating System
1. Scope
Rating Condition
1.1 This test method covers the evaluation of the cavitation
10 No corrosion or erosion present; no metal loss. No change from
corrosion and erosion-corrosion characteristics of aluminum
original casting configuration. Staining permitted.
automotive water pumps with coolants.
9 Minimal corrosion or erosion. Some rounding of sharp corners or light
smoothing or both, or polishing of working surfaces.
NOTE 1—During the development of this test method, it was found that
8 Light corrosion or erosion may be generalized on working
results obtained when testing two-phase coolants did not correlate with
1
surfaces. Dimensional change not to exceed 0.4 mm ( ⁄64 in.).
resultsfromfieldtests.Therefore,thetestmethodcannotberecommended
7 Corrosion or erosion with dimensional change not to exceed 0.8 mm
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as being a significant test for determining cavitation effects of two-phase ( ⁄32 in.). Random pitting to 0.8 mm permitted.
6 Corrosion or erosion with dimensional change not to exceed 0.8 mm.
coolants.
Depressions, grooves, clusters of pits, or scalloping, or
1.2 The values stated in SI units are to be regarded as the
both, within 0.8 mm dimensional change limit permitted.
5 Corrosion or erosion with dimensional change not to exceed 1.6 mm
standard. The values given in parentheses are for information
1
( ⁄16 in.). Small localized areas of metal removal in
only.
high-impingement regions or random pits to 1.6 mm permitted.
1.3 This standard does not purport to address all of the
4 Corrosion or erosion with dimensional change not to exceed 1.6 mm.
Small localized areas of metal removal in high-impingement regions,
safety concerns, if any, associated with its use. It is the
clusters of pits within 1.6 mm dimensional change. Random pits to 2.4
responsibility of the user of this standard to establish appro-
3
mm ( ⁄32 in.) permitted.
priate safety and health practices and determine the applica- 3 Corrosion or erosion with dimensional change not to exceed 2.4 mm.
Depressions, grooves, clusters of pits or scalloping, or
bility of regulatory limitations prior to use. Specific warning
both, permitted.
statements are given in 5.2.
2 Corrosion or erosion with any dimensional change over 2.4 mm, and
short of pump case failure.
2. Referenced Documents 1 Pump case leaking due to corrision or erosion.
2
2.1 ASTM Standards:
A
If placement in a rating group is uncertain or border-line, elevate the rating to
D1176 Practice for Sampling and Preparing Aqueous Solu-
the higher of the two groups in question.
B
tions of Engine Coolants orAntirusts for Testing Purposes
Ratings 1 to 3 are dependent on pump-wall thickness and are intended to be
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used as relative ratings for tests using a given pump.
2.2 ASTM Adjunct:
Pump test stand (7 drawings and Bill of Materials)
3. Summary of Test Method
103-kPa (15-psig) simulated automotive coolant system (Note
3.1 This test method consists of pumping an aqueous
2).An aluminum automotive water pump, driven at 4600 r/min
coolant solution at 113°C (235°F) through a pressurized by an electric motor, is used to pump the solution and to serve
as the object specimen in evaluating the cavitation erosion-
1 corrosion effect of the coolant under test. The pump is
This test method is under the jurisdiction ofASTM Committee D15 on Engine
Coolants and is the direct responsibility of Subcommittee D15.09 on Simulated
examined to determine the extent of cavitation erosion-
Service Tests.
corrosion damage and is rated according to the system given in
Current edition approved May 1, 2004. Published June 2004. Originally
Table 1. Photographs of typical eroded pumps after testing
approved in 1969 as D2809–69T. Last previous edition approved in 1999 as
appear in the Appendix.
D2809–94(99). DOI: 10.1520/D2809-04E02.
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For referenced ASTM standards, visit the ASTM website, www.astm.org, or
NOTE 2—Tests run at other than 113°C (235°F) might show more or
contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
less cavitation depending upon the coolant formulation.
Standards volume information, refer to the standard’s Document Summary page on
the ASTM website.
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Detail drawing
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