ASTM D4725-13

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 and health practices and determine the applicability of regulatory limitations prior to use.

General Information

• Status: Historical
• Publication Date: 30-Sep-2013
• ICS: 01.040.71 - Chemical technology (Vocabularies)
• ICS: 71.100.45 - Refrigerants and antifreezes
• Technical Committee: D15 - Engine Coolants and Related Fluids
• Drafting Committee: D15.92 - Terminology

Relations

• Replaces: ASTM D4725-11 - Standard Terminology for Engine Coolants
• Effective Date: 01-Oct-2013
• Referred By: ASTM D7715-12(2021) - Standard Specification for Fully-Formulated Glycerin Base Engine Coolant for Heavy-Duty Engines
• Effective Date: 01-Oct-2013
• Referred By: ASTM D7517-19 - Standard Specification for Fully-Formulated 1,3 Propanediol (PDO) Base Engine Coolant for Heavy-Duty Engines
• Effective Date: 01-Oct-2013
• Referred By: ASTM D3306-21 - Standard Specification for Glycol Base Engine Coolant for Automobile and Light-Duty Service
• Effective Date: 01-Oct-2013
• Referred By: ASTM D7518-20 - Standard Specification for 1,3 Propanediol (PDO) Base Engine Coolant for Automobile and Light-Duty Service
• Effective Date: 01-Oct-2013
• Referred By: ASTM D4985-10(2023) - Standard Specification for Low Silicate Ethylene Glycol Base Engine Coolant for Heavy Duty Engines Requiring a Pre-Charge of Supplemental Coolant Additive (SCA)
• Effective Date: 01-Oct-2013
• Referred By: ASTM D2847-22 - Standard Practice for Testing Engine Coolants in Car and Light Truck Service
• Effective Date: 01-Oct-2013
• Referred By: ASTM D8039-16(2023) - Standard Specification for Heat Transfer Fluids (HTF) for Heating and Air Conditioning (HVAC) Systems
• Effective Date: 01-Oct-2013
• Referred By: ASTM D7637-10(2021) - Standard Test Method for Determination of Glycerin Assay by Titration (Sodium Meta Periodate)
• Effective Date: 01-Oct-2013
• Referred By: ASTM D7714-11(2021) - Standard Specification for Glycerin Base Engine Coolant for Automobile and Light-Duty Service
• Effective Date: 01-Oct-2013
• Referred By: ASTM D3147-21 - Standard Test Method for Testing Stop-Leak Additives for Engine Coolants
• Effective Date: 01-Oct-2013
• Referred By: ASTM D7713-18 - Standard Specification for Aqueous Engine Coolant Grade Glycol (53 % by Volume Nominal)
• Effective Date: 01-Oct-2013
• Referred By: ASTM D7638-10(2021) - Standard Test Method for Determination of Fatty Acids and Esters in Glycerin
• Effective Date: 01-Oct-2013
• Referred By: ASTM D8485-23 - Standard Test Method for Corrosion Test for Electric Vehicle Coolants in Glassware
• Effective Date: 01-Oct-2013
• Referred By: ASTM E1177-23 - Standard Specification for Engine Coolant Grade Glycol
• Effective Date: 01-Oct-2013

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
Designation: D4725 − 13
StandardTerminology 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.
1. Scope 3. Terminology
1.1 This document covers terminology relating to engine
antifoam, n—a substance added to engine coolant concentrate,
coolants. It is intended to provide a reference for anyone
corrosion inhibitor packages, or supplemental coolant addi-
seeking information on engine coolants, and also to provide a
tives to prevent or suppress foam.
uniform set of definitions for use in preparing ASTM
DISCUSSION—Eliminating foam improves heat transfer.
specifications, test methods and other standard documents.
antifreeze, n—a term frequently used in the marketplace for
1.2 This standard does not purport to address all of the
engine coolant concentrate. (See engine coolant concen-
safety concerns, if any, associated with its use. It is the
trate.)
responsibility of the user of this standard to establish appro-
antirust, n—an inhibitor package, solid or liquid, intended to
priate safety and health practices and determine the applica-
be diluted with water or glycol for use in an engine cooling
bility of regulatory limitations prior to use.
system to mitigate rust and corrosion.
2. Referenced Documents
ash content, n—the residue from an engine coolant
2
2.1 ASTM Standards: concentrate, antirust, or engine coolant that remains after
D1193 Specification for Reagent Water
evaporation, charring, and ignition at strong heat.
D3306 Specification for Glycol Base Engine Coolant for
boiling point, n—the temperature at which the vapor pressure
Automobile and Light-Duty Service
of an engine coolant reaches atmospheric pressure under
D3585 Specification forASTM Reference Fluid for Coolant
equilibrium boiling conditions.
Tests
D4985 Specification for Low Silicate Ethylene Glycol Base
cavitation corrosion, n—a form of localized, accelerated
Engine Coolant for Heavy Duty Engines Requiring a
corrosion characterized by deep pitting and caused by high
Pre-Charge of Supplemental Coolant Additive (SCA)
mechanical forces resulting from coolant vapor bubble
D6210 Specification for Fully-Formulated Glycol Base En-
collapse at the surface of the metal.
gine Coolant for Heavy-Duty Engines
D6471 Specification for Recycled Prediluted Aqueous Gly- cavitation erosion corrosion, n—the mechanical removal of
protective films on metal by the formation and collapse of
col Base Engine Coolant (50 Volume % Minimum) for
Automobile and Light-Duty Service vapor bubbles in a liquid,and the abrasive action of a liquid,
which may contain suspended solids, moving at high veloc-
D6472 SpecificationforRecycledGlycolBaseEngineCool-
ant Concentrate for Automobile and Light-Duty Service ity.
E1177 Specification for Engine Coolant Grade Glycol DISCUSSION—Themechanicalremovaloftheprotectivefilmsexposes
fresh metal to corrosive attack.
2.2 ISO Standard:
ISO 22241 Diesel engines - NOx reduction agent AUS 32
coolant additive package, n—the combination of inhibitors
added to an engine coolant to mitigate cooling system
degradation, corrosion, scaling, and foaming, or to provide
other desirable properties.
1
This terminology is under the jurisdiction ofASTM Committee D15 on Engine
Coolants and Related Fluids and is the direct responsibility of Subcommittee
corrosion inhibitor package,n—thecombinationofinhibitors
D15.92 on Terminology.
Current edition approved Oct. 1, 2013. Published October 2013. Originally
added to an engine coolant to mitigate cooling system
approved in 1987. Last previous edition approved in 2011 as D4725 – 11. DOI:
corrosion.
10.1520/D4725-13.
2
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
corrosive water, n—a standard solution containing 100 ppm
contact ASTM Customer Service at [e-mail]. For Annual Book of ASTM
each of sulfate, chloride, and bicarbonate ions introduced as
Standards volume information, refer to the standard’s Document Summary page on
the ASTM website. the sodium salts to distilled water.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
1

---------------------- Page: 1 ----------------------
D4725 − 13
diesel exhaust fluid (DEF), n—preparation of aqueous urea heavy-duty, adj— in internal combustion engine operation,
[(NH ) CO], containing 32.5 % by weight of technically characterized by average speeds, power output, and internal
2 2
pure urea in high-purity water with quality characteristics temperatures that are generally close to th
...

This document is not an ASTM standard and is intended only to provide the user of an ASTM standard an indication of what changes have been made to the previous version. Because
it may not be technically possible to adequately depict all changes accurately, ASTM recommends that users consult prior editions as appropriate. In all cases only the current version
of the standard as published by ASTM is to be considered the official document.
Designation: D4725 − 11 D4725 − 13
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.
1. 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 and health practices and determine the applicability of regulatory
limitations prior to use.
2. Referenced Documents
2
2.1 ASTM Standards:
D1193 Specification for Reagent Water
D3306 Specification for Glycol Base Engine Coolant for Automobile and Light-Duty Service
D3585 Specification for ASTM Reference Fluid for Coolant Tests
D4985 Specification for Low Silicate Ethylene Glycol Base Engine Coolant for Heavy Duty Engines Requiring a Pre-Charge
of Supplemental Coolant Additive (SCA)
D6210 Specification for Fully-Formulated Glycol Base Engine Coolant for Heavy-Duty Engines
D6471 Specification for Recycled Prediluted Aqueous Glycol Base Engine Coolant (50 Volume % Minimum) for Automobile
and Light-Duty Service
D6472 Specification for Recycled Glycol Base Engine Coolant Concentrate for Automobile and Light-Duty Service
E1177 Specification for Engine Coolant Grade Glycol
2.2 ISO Standard:
ISO 22241 Diesel engines - NOx reduction agent AUS 32
3. Terminology
antifoam, n—a substance added to engine coolant concentrate, corrosion inhibitor packages, or supplemental coolant additives to
prevent or suppress foam.
1
This terminology is under the jurisdiction of ASTM Committee D15 on Engine Coolants and Related Fluids and is the direct responsibility of Subcommittee D15.92
on Terminology.
Current edition approved June 1, 2011Oct. 1, 2013. Published August 2011October 2013. Originally approved in 1987. Last previous edition approved in 20082011 as
D4725 – 08a.D4725 – 11. DOI: 10.1520/D4725-11.10.1520/D4725-13.
2
For referenced ASTM standards, visit the ASTM website, www.astm.org, or contact ASTM Customer Service at [e-mail]. For Annual Book of ASTM Standards
volume information, refer to the standard’s Document Summary page on the ASTM website.
DISCUSSION—
Eliminating foam improves heat transfer.
antifreeze, n—a term frequently used in the marketplace for engine coolant concentrate. (See engine coolant concentrate.)
antirust, n—an inhibitor package, solid or liquid, intended to be diluted with water or glycol for use in an engine cooling system
to mitigate rust and corrosion.
ash content, n—the residue from an engine coolant concentrate, antirust, or engine coolant that remains after evaporation, charring,
and ignition at strong heat.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
1

---------------------- Page: 1 ----------------------
D4725 − 13
boiling point, n—the temperature at which the vapor pressure of an engine coolant reaches atmospheric pressure under equilibrium
boiling conditions.
cavitation corrosion, n—a form of localized, accelerated corrosion characterized by deep pitting and caused by high mechanical
forces resulting from coolant vapor bubble collapse at the surface of the metal.
cavitation erosion corrosion, n—the mechanical removal of protective films on metal by the formation and collapse of vapor
bubbles in a liquid,and the abrasive action of a liquid, which may contain suspended solids, moving at high velocity.
DISCUSSION—
The mechanical removal of the protective films exposes fresh metal to corrosive attack.
coolant additive package, n—the combination of inhibitors added to an engine coolant to mitigate cooling system degradation,
corrosion, scaling, and foaming, or to provide other desirable properties.
corrosion inhibitor package, n—the combination of inhibitors added to an engine coolant to mitigate cooling system corrosion.
corrosive water, n—a standard solution containing 100 ppm each of sulfate, chloride, and bicarbonate ions introduced as the
sodium salts to di
...