ASTM D7935/D7935M-14

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Designation: D7935/D7935M − 14
Standard Test Method for
Corrosion Test for Non-Aqueous Engine Coolants in
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Glassware
This standard is issued under the fixed designation D7935/D7935M; 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. Scope E178 Practice for Dealing With Outlying Observations
E230/E230M Specification for Temperature-Electromotive
1.1 This test method covers a simple beaker-type procedure
Force (emf) Tables for Standardized Thermocouples
for evaluating the effects of non-aqueous engine coolants on
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metal specimens under controlled laboratory conditions (see
2.2 ASTM Adjunct:
Appendix X1). All-glass apparatus for corrosion test (2 drawings)
NOTE 1—For more information on aqueous and non-aqueous engine
2
3. Summary of Test Method
coolants, see (Refs 1-9).
1.2 The values stated in either SI units or inch-pound units
3.1 In this test method, specimens of metals typical of those
are to be regarded separately as standard. The values stated in
present in engine cooling systems are totally immersed in
each system may not be exact equivalents; therefore, each
aeratedenginecoolantsolutionsfor336hat96°C[205°F].The
system shall be used independently of the other. Combining
corrosion-inhibitivepropertiesofthetestsolutionareevaluated
values from the two systems may result in non-conformance
on the basis of the weight changes incurred by the specimens.
with the standard. Some values have only SI units because the
Each test is run in triplicate, and the average weight change is
inch-pound equivalents are not used in practice.
determined for each metal. A single test may occasionally be
completely out of line (see 11.3).
1.3 This standard does not purport to address all of the
safety concerns, if any, associated with its use. It is the
4. Significance and Use
responsibility of the user of this standard to establish appro-
priate safety and health practices and determine the applica-
4.1 This test method will generally distinguish between
bility of regulatory limitations prior to use. Some specific
non-aqueous coolants that are definitely deleterious from the
hazardsstatementsaregivenin10.1.7.2,10.1.7.3,and10.1.7.4.
corrosion standpoint and those that are suitable for further
evaluation. However, the results of this test method cannot
2. Referenced Documents
stand alone as evidence of satisfactory corrosion inhibition.
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2.1 ASTM Standards:
The actual service value of an engine coolant formulation can
B32 Specification for Solder Metal
be determined only by more comprehensive bench,
B36/B36M Specification for Brass Plate, Sheet, Strip, And
dynamometer, and field tests.
Rolled Bar
D1176 Practice for Sampling and Preparing Aqueous Solu-
5. Apparatus
tions of Engine Coolants orAntirusts forTesting Purposes
D1384 Test Method for Corrosion Test for Engine Coolants 5.1 Container,a1000-mL,tall-form,spoutlessbeaker,made
of heat-resistant glass, for containing the non-aqueous engine
in Glassware
coolant solution and test specimens.The beaker shall be tightly
E1 Specification for ASTM Liquid-in-Glass Thermometers
closed with a No. 15 rubber stopper, having drill holes to
accommodate a water condenser, an aerator tube, and a
1
This test method is under the jurisdiction ofASTM Committee D15 on Engine
temperature measuring instrument as shown in Fig. 1.
Coolants and Related Fluids and is the direct responsibility of Subcommittee 4
Optionally, an all-glass apparatus may be used.
D15.22 on Non-Aqueous Coolants.
Current edition approved June 1, 2014. Published August 2014. DOI: 10.1520/
5.2 Condenser, a water condenser of the reflux, glass-tube
D7935_D7935M–14
type, having a 400-mm [16-in.] condenser jacket.
2
The boldface numbers in parentheses refer to the list of references at the end of
this standard.
3
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
4
Standards volume information, refer to the standard’s Document Summary page on Available from ASTM International Headquarters. Order Adjunct No.
the ASTM website. ADJD1384. Original adjunct produced in 1980.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
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D7935/D7935M − 14
FIG. 1 Metal Specimens and Equipment for 336–h Corrosion Test
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5.3 AeratorTube,agas-dispersiontube,porositysize12-C, 6. Metal Test Specimens
NOTE 2—The specimens prescribed in this test method have been
to ensure continuous aeration without plugging.
accepted by automobile manufa
...