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ASTM D7935/D7935M-14

(Test Method)

Standard Test Method for Corrosion Test for Non-Aqueous Engine Coolants in Glassware

Standard Test Method for Corrosion Test for Non-Aqueous Engine Coolants in Glassware

SIGNIFICANCE AND USE
4.1 This test method will generally distinguish between non-aqueous coolants that are definitely deleterious from the corrosion standpoint and those that are suitable for further evaluation. However, the results of this test method cannot stand alone as evidence of satisfactory corrosion inhibition. The actual service value of an engine coolant formulation can be determined only by more comprehensive bench, dynamometer, and field tests.
SCOPE
1.1 This test method covers a simple beaker-type procedure for evaluating the effects of non-aqueous engine coolants on metal specimens under controlled laboratory conditions (see Appendix X1).
Note 1: For more information on aqueous and non-aqueous engine coolants, see (Refs 1-9).2  
1.2 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. Some values have only SI units because the inch-pound equivalents are not used in practice.  
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. Some specific hazards statements are given in 10.1.7.2, 10.1.7.3, and 10.1.7.4.

General Information

Status
Historical
Publication Date
31-May-2014
ICS
71.100.45 - Refrigerants and antifreezes
Technical Committee
D15 - Engine Coolants and Related Fluids
Drafting Committee
D15.22 - Non-Aqueous Coolants
Current Stage
Ref Project

Relations

Replaced By
ASTM D7935-20 - Standard Test Method for Corrosion Test for Non-Aqueous Engine Coolants in Glassware
Effective Date
01-Jun-2020
Referred By
ASTM D8085-17 - Standard Specification for Non-Aqueous Engine Coolant for Automobile and Light-Duty Service
Effective Date
01-Jun-2014
Referred By
ASTM D8034/D8034M-17 - Standard Test Method for Simulated Service Corrosion Testing of Non-Aqueous Engine Coolants
Effective Date
01-Jun-2014

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ASTM D7935/D7935M-14 - Standard Test Method for Corrosion Test for Non-Aqueous Engine Coolants in GlasswareASTM D7935/D7935M-14 - Standard Test Method for Corrosion Test for Non-Aqueous Engine Coolants in Glassware
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ASTM D7935/D7935M-14 - Standard Test Method for Corrosion Test for Non-Aqueous Engine Coolants in Glassware
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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
Designation: D7935/D7935M − 14
Standard Test Method for
Corrosion Test for Non-Aqueous Engine Coolants in
1
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
4
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.
3
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
1

---------------------- Page: 1 ----------------------
D7935/D7935M − 14
FIG. 1 Metal Specimens and Equipment for 336–h Corrosion Test
5
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
...

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SCOPE
1.1 This specification covers the requirements for low silicate ethylene glycol base engine coolants for cooling systems of heavy-duty engines. When concentrates are used at 40 % to 60 % concentration by volume in water, or when prediluted glycol base engine coolants (50 volume % minimum) are used without further dilution, they will function effectively to provide protection against corrosion, freezing to at least −36.4 °C (−33.5 °F), and boiling to at least 108 °C (226 °F).
Note 1: This specification is based on the knowledge of the performance of engine coolants prepared from new or virgin ingredients. A separate specification exists (Specification D6210) for heavy-duty engine coolants which may be prepared from recycled or reprocessed used coolant or reprocessed industrial-source ethylene glycol.  
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This specification establishes the requirements for ethylene glycol, propylene glycol, 1,3 propanediol, and glycerin base heat transfer fluids (HTF) used in heating and air conditioning (HVAC) systems. When concentrates are used at up to 65% concentration by weight in water, or when prediluted heat transfer fluids (30% by weight minimum) are used without further dilution, they will function effectively to provide protection against freezing, and corrosion. The HTFs governed by this specification are categorized according to the primary base of freeze depressant used: I (ethylene glycol), II (propylene glycol), III (1,3-propanediol), and IV (glycerin).
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1.4 Heat transfer fluids meeting this specification shall be tested and fully comply with requirements listed in Table 1.  
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5.1 This test method provides a method to distinguish between coolants that are deleterious from the corrosion standpoint and those suitable for further evaluation.
FIG. 1 Metal Specimens and Equipment for the 336 h Corrosion Test
FIG. 2 Tall Form Beaker Specimens and Equipment for the 336 h Corrosion Test
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Standard Specification for Engine Coolant Grade Glycol

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This specification establishes the testing and requirements of four types of engine coolant grade ethylene glycol and propylene glycol, including virgin glycols and those derived from the recycling of vehicle engine coolants and industrial source glycols. Types EG-1 and PG-1 cover glycols with sufficiently low limits on components to allow a blended coolant to meet most OEM (Original Equipment Manufacturer) specifications. These types will probably be virgin materials, although redistillation could produce a sufficiently pure product. Types EG-2 and PG-2 cover glycol that will be suitable for many coolants, and can either be redistilled or virgin. The commercial products shall be suitably sampled and tested, and shall conform accordingly to specified values of the following physical and chemical properties: clarity; color (Pt/Co scale); relative density; pH by volume in distilled water; acidity as acetic acid; composition by mass of individual glycols (including ethylene glycol, propylene glycol, dipropylene glycol, and others); total composition by mass of all glycols; water content; glycol ester content; and the maximum content for nitrites, nitrates, phosphates, silicon, chloride, sulfate, boron, aluminum, calcium, copper, iron, magnesium, lead, zinc, and iron.
SCOPE
1.1 This specification covers commercial products, engine coolant grade ethylene glycol and propylene glycol, including virgin glycols and those derived from the recycling of vehicle engine coolants and industrial source glycols.  
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1.3 The values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard.  
1.4 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, health, and environmental practices and determine the applicability of regulatory limitations prior to use.  
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ASTM D1177-22(Test Method)
Standard Test Method for Freezing Point of Aqueous Engine Coolants

SIGNIFICANCE AND USE
5.1 The freezing point of an engine coolant indicates the coolant freeze protection.  
5.2 The freezing point of an engine coolant may be used to determine the approximate glycol or glycerin content, provided the glycol type is known.
SCOPE
1.1 This test method covers the determination of the freezing point of an aqueous engine coolant solution in the laboratory.  
Note 1: Where solutions of specific concentrations are to be tested, they shall be prepared from representative samples as directed in Practice D1176. Secondary phases separating on dilution need not be separated.
Note 2: These products may also be marketed in a ready-to-use form (prediluted).  
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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, health, and environmental practices and determine the applicability of regulatory limitations prior to use.  
1.4 This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.

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