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ASTM D4725-15(2023)

(Terminology)

Standard Terminology for Engine Coolants and Related Fluids

Standard Terminology for Engine Coolants and Related Fluids

SCOPE
1.1 This document covers terminology relating to engine coolants. It is intended to provide a reference for anyone seeking information on engine coolants, and also to provide a uniform set of definitions for use in preparing ASTM specifications, test methods and other standard documents.  
1.2 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.  
1.3 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.

General Information

Status
Published
Publication Date
31-Aug-2023
ICS
01.040.71 - Chemical technology (Vocabularies)
71.100.45 - Refrigerants and antifreezes
Technical Committee
D15 - Engine Coolants and Related Fluids
Drafting Committee
D15.92 - Terminology
Current Stage
Ref Project

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ASTM D4725-15(2023) - Standard Terminology for Engine Coolants and Related Fluids
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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.
Designation: D4725 − 15 (Reapproved 2023)
Standard Terminology for
1
Engine Coolants and Related Fluids
This standard is issued under the fixed designation D4725; 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.
3
1. Scope Automobile and Light-Duty Service (Withdrawn 2019)
D6472 Specification for Recycled Glycol Base Engine Cool-
1.1 This document covers terminology relating to engine
ant Concentrate for Automobile and Light-Duty Service
coolants. It is intended to provide a reference for anyone
3
(Withdrawn 2019)
seeking information on engine coolants, and also to provide a
E1177 Specification for Engine Coolant Grade Glycol
uniform set of definitions for use in preparing ASTM
2.2 ISO Standard:
specifications, test methods and other standard documents.
ISO 22241 Diesel engines - NOx reduction agent AUS 32
1.2 This standard does not purport to address all of the
safety concerns, if any, associated with its use. It is the
3. Terminology
responsibility of the user of this standard to establish appro-
antifoam, n—a substance added to engine coolant concentrate,
priate safety, health, and environmental practices and deter-
corrosion inhibitor packages, or supplemental coolant addi-
mine the applicability of regulatory limitations prior to use.
tives to prevent or suppress foam.
1.3 This international standard was developed in accor-
DISCUSSION—Eliminating foam improves heat transfer.
dance with internationally recognized principles on standard-
ization established in the Decision on Principles for the antifreeze, n—a term frequently used in the marketplace for
Development of International Standards, Guides and Recom- engine coolant concentrate. (See engine coolant concen-
mendations issued by the World Trade Organization Technical trate.)
Barriers to Trade (TBT) Committee.
antirust, n—an inhibitor package, solid or liquid, intended to
be diluted with water or glycol for use in an engine cooling
2. Referenced Documents
system to mitigate rust and corrosion.
2
2.1 ASTM Standards:
D1193 Specification for Reagent Water ash content, n—the residue from an engine coolant
concentrate, antirust, or engine coolant that remains after
D3306 Specification for Glycol Base Engine Coolant for
Automobile and Light-Duty Service evaporation, charring, and ignition at strong heat.
D3585 Specification for ASTM Reference Fluid for Coolant
boiling point, n—the temperature at which the vapor pressure
Tests
of an engine coolant reaches atmospheric pressure under
D4985 Specification for Low Silicate Ethylene Glycol Base
equilibrium boiling conditions.
Engine Coolant for Heavy Duty Engines Requiring a
Pre-Charge of Supplemental Coolant Additive (SCA)
cavitation corrosion, n—a form of localized, accelerated
D6210 Specification for Fully-Formulated Glycol Base En- corrosion characterized by deep pitting and caused by high
gine Coolant for Heavy-Duty Engines
mechanical forces resulting from coolant vapor bubble
D6471 Specification for Recycled Prediluted Aqueous Gly- collapse at the surface of the metal.
col Base Engine Coolant (50 Volume % Minimum) for
cavitation erosion corrosion, n—the mechanical removal of
protective films on metal by the formation and collapse of
1
This terminology is under the jurisdiction of ASTM Committee D15 on Engine
vapor bubbles in a liquid, and the abrasive action of a liquid,
Coolants and Related Fluids and is the direct responsibility of Subcommittee
which may contain suspended solids, moving at high veloc-
D15.92 on Terminology.
ity.
Current edition approved Sept. 1, 2023. Published September 2023. Originally
DISCUSSION—The mechanical removal of the protective films exposes
approved in 1987. Last previous edition approved in 2015 as D4725 – 15. DOI:
10.1520/D4725-15R23. fresh metal to corrosive attack.
2
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
3
Standards volume information, refer to the standard’s Document Summary page on The last approved version of this historical standard is referenced on
the ASTM website. www.astm.org.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
1

---------------------- Page: 1 ----------------------
D4725 − 15 (2023)
coolant additive package, n—the combination of inhibitors glycol bottoms, n—the residue in the still after final distillation
added to an engi
...

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