ASTM D4725-08
(Terminology)Standard Terminology for Engine Coolants
Standard Terminology for Engine Coolants
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
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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NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.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
Designation:D4725–08
Standard Terminology for
1
Engine Coolants
This standard is issued under the fixed designation D 4725; 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 boiling point, n—the temperature at which the vapor pressure
of an engine coolant reaches atmospheric pressure under
1.1 This document covers terminology relating to engine
equilibrium boiling conditions.
coolants. It is intended to provide a reference for anyone
cavitation corrosion, n—a form of localized, accelerated
seeking information on engine coolants, and also to provide a
corrosion characterized by deep pitting and caused by high
uniform set of definitions for use in preparing ASTM specifi-
mechanical forces resulting from coolant vapor bubble
cations, test methods and other standard documents.
collapse at the surface of the metal.
1.2 This standard does not purport to address all of the
cavitation erosion corrosion, n—the mechanical removal of
safety concerns, if any, associated with its use. It is the
protective films on metal by the formation and collapse of
responsibility of the user of this standard to establish appro-
vapor bubbles in a liquid,and the abrasive action of a liquid,
priate safety and health practices and determine the applica-
which may contain suspended solids, moving at high veloc-
bility of regulatory limitations prior to use.
ity.
2. Referenced Documents
DISCUSSION—Themechanicalremovaloftheprotectivefilmsexposes
2
2.1 ASTM Standards:
fresh metal to corrosive attack.
D 1193 Specification for Reagent Water
coolant additive package, n—the combination of inhibitors
D 3585 Specification for ASTM Reference Fluid for Cool-
added to an engine coolant to mitigate cooling system
ant Tests
degradation, corrosion, scaling, and foaming, or to provide
other desirable properties.
3. Terminology
corrosion inhibitor package, n—the combination of inhibi-
antifoam, n—a substance added to engine coolant concentrate,
tors added to an engine coolant to mitigate cooling system
corrosion inhibitor packages, or supplemental coolant addi-
corrosion.
tives to prevent or suppress foam.
corrosive water, n—a standard solution containing 100 ppm
each of sulfate, chloride, and bicarbonate ions introduced as
DISCUSSION—Eliminating foam improves heat transfer.
the sodium salts to distilled water.
antifreeze, n—a term frequently used in the marketplace for
dye, n—a colorant added to an engine coolant to give it a
engine coolant concentrate. (See engine coolant concen-
distinctive color.
trate.)
engine coolant, n—a fluid used to transfer heat from an engine
antirust, n—an inhibitor package, solid or liquid, intended to
to the radiator, usually containing specific amounts of
be diluted with water or glycol for use in an engine cooling
glycols, water, corrosion inhibitors, and a foam supressor.
system to mitigate rust and corrosion.
DISCUSSION—Engine coolants may also contain supplemental coolant
ash content, n—the residue from an engine coolant concen-
additives.
trate, antirust, or engine coolant that remains after evapora-
tion, charring, and ignition at strong heat.
engine coolant concentrate, n—a formulated liquid product
intended to be diluted with water for use in engine cooling
systems.
1
This terminology is under the jurisdiction ofASTM Committee D15 on Engine
DISCUSSION—Functionally, the product provides a lower freeze point
Coolants and is the direct responsibility of Subcommittee D15.92 on Terminology.
and mitigates corrosion and foaming.
Current edition approved May 15, 2008. Published June 2008. Originally
approved in 1987. Last previous edition approved in 2006 as D 4725 – 06.
engine dynamometer test, n—a laboratory full-scale engine
2
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
test designed to evaluate corrosion protection and inhibitor
contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
stability of engine coolants under simulated operational
Standards volume information, refer to the standard’s Document Summary page on
the ASTM website. conditions.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.
1
---------------------- Page: 1 ----------------------
D4725–08
erosion corrosion, n—nonuniform, accelerated corrosion light-duty, adj— in internal combustion engine operation,
characterized by a smooth appearance and caused by high- characterized by average speeds, power output, and internal
velocity coolant. temperatures that are generally much lower than the poten-
tial maximums.
DISCUSSION—The corr
...
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:D4725–06 Designation: D 4725 – 08
Standard Terminology for
1
Engine Coolants
This standard is issued under the fixed designation D 4725; 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:
D 1193 Specification for Reagent Water
D 3585 Specification for ASTM Reference Fluid for Coolant Tests
3. Terminology
antifoam, n—a substance added to engine coolant concentrate, corrosion inhibitor packages, or supplemental coolant additives to
prevent or suppress foam.
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.
boiling point,n—thetemperatureatwhichthevaporpressureofanenginecoolantreachesatmosphericpressureunderequilibrium
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 distilled water.
dye, n—a colorant added to an engine coolant to give it a distinctive color.
engine coolant, n—a fluid used to transfer heat from an engine to the radiator, usually containing specific amounts of glycols,
water, corrosion inhibitors, and a foam supressor.
DISCUSSION—Engine coolants may also contain supplemental coolant additives.
1
This terminology is under the jurisdiction of ASTM Committee D15 on Engine Coolants and is the direct responsibility of Subcommittee D15.92 on Terminology .
Current edition approved June 1, 2006.May 15, 2008. Published June 2006.2008. Originally approved in 1987. Last previous edition approved in 20042006 as
D 4725 – 046.
2
For referencedASTM standards, visit theASTM website, www.astm.org, or contactASTM Customer Service at service@astm.org. For Annual Book of ASTM Standards
volume information, refer to the standard’s Document Summary page on the ASTM website.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.
1
---------------------- Page: 1 ----------------------
D4725–08
engine coolant concentrate, n—a formulated liquid product intended to be diluted with water for use in engine cooling systems.
DISCUSSION—Functionally, the product provides a lower freeze point and mitigates corrosion and foaming.
engine dynamometer test, n—a laboratory full-scale engine test designed to evaluate corrosion protection and inhibitor stability
of engine coolants under simulated operational conditions.
erosion corrosion, n—nonuniform, accelerated
...
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