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ASTM D7820-12

(Test Method)

Standard Test Method for Engine Coolant Corrosion Protection Under Accelerated Thermal and Oxidizing Conditions Using a Rotating Pressure Vessel

Standard Test Method for Engine Coolant Corrosion Protection Under Accelerated Thermal and Oxidizing Conditions Using a Rotating Pressure Vessel

SIGNIFICANCE AND USE
4.1 Engines operating under severe conditions involving high temperatures, hot spot areas, entrained air, and/or small cooling systems are placing greater emphasis on engine coolant oxidation stability and corrosion protection. This standard provides an accelerated test method to assess engine coolant performance under high temperature oxidizing test conditions of new, used, and/or recycled engine coolants. The test method may also serve as a screening tool to determine oxidation stability. The test results of this method cannot stand alone as evidence of satisfactory oxidation stability and corrosion protection. The actual service of an engine coolant formulation can be determined only by more comprehensive bench, dynamometer, and field tests.
SCOPE
1.1 This test method covers determination of engine coolant corrosion protection and stability under accelerated thermal and oxidizing conditions using a rotary pressure vessel.  
1.2 The values stated in SI units are to be regarded as the standard. The values given in parentheses are for information only.  
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. Specific hazard statements are given in 6.2, 6.3, 6.4, 6.5, 6.7, 6.8, 6.9, 6.10, 11.1, 12.8, 12.9, and 12.10.

General Information

Status
Historical
Publication Date
31-Oct-2012
ICS
71.100.45 - Refrigerants and antifreezes
Technical Committee
D15 - Engine Coolants and Related Fluids
Drafting Committee
D15.21 - Extended Life Coolants
Current Stage
Ref Project

Relations

Replaced By
ASTM D7820-19 - Standard Test Method for Engine Coolant Corrosion Protection Under Accelerated Thermal and Oxidizing Conditions Using a Rotating Pressure Vessel
Effective Date
01-Oct-2019

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ASTM D7820-12 - Standard Test Method for Engine Coolant Corrosion Protection Under Accelerated Thermal and Oxidizing Conditions Using a Rotating Pressure VesselASTM D7820-12 - Standard Test Method for Engine Coolant Corrosion Protection Under Accelerated Thermal and Oxidizing Conditions Using a Rotating Pressure Vessel
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ASTM D7820-12 - Standard Test Method for Engine Coolant Corrosion Protection Under Accelerated Thermal and Oxidizing Conditions Using a Rotating Pressure Vessel
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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: D7820 − 12
Standard Test Method for
Engine Coolant Corrosion Protection Under Accelerated
Thermal and Oxidizing Conditions Using a Rotating
1
Pressure Vessel
This standard is issued under the fixed designation D7820; 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 equipped with a pressure gauge.The pressure vessel is charged
with air or oxygen to a gage pressure of 620 kPa (90 psi, 6.2
1.1 This test method covers determination of engine coolant
bar) (see conversion factor 1), placed in a constant–tempera-
corrosion protection and stability under accelerated thermal
ture oil bath set at a controlled temperature (typically 115°C
and oxidizing conditions using a rotary pressure vessel.
(239°F) or 150°C (302°F)) and rotated axially at 100 rpm at an
1.2 The values stated in SI units are to be regarded as the
angle of 30° from horizontal for 168 h. The use of air or
standard. The values given in parentheses are for information
oxygen and test temperature is left to the discretion of the user
only.
of the test. Engine coolant performance is assessed for corro-
1.3 This standard does not purport to address all of the
sion protection based on changes in metal coupon weights and
safety concerns, if any, associated with its use. It is the coolant stability is evaluated based on changes in coolant
responsibility of the user of this standard to establish appro-
physical and compositional properties. The test method is
priate safety and health practices and determine the applica- based on a combination of ASTM D1384 (modified metal
bility of regulatory limitations prior to use. Specific hazard
coupon bundle) andASTM D2272 (glassware, pressure vessel,
statements are given in 6.2, 6.3, 6.4, 6.5, 6.7, 6.8, 6.9, 6.10, and bath apparatus) test procedures.
11.1, 12.8, 12.9, and 12.10.
100 kPa 5 1.00 bar 5 14.5 psi (1)
2. Referenced Documents
4. Significance and Use
2
2.1 ASTM Standards:
4.1 Engines operating under severe conditions involving
B32 Specification for Solder Metal
high temperatures, hot spot areas, entrained air, and/or small
D1176 Practice for Sampling and Preparing Aqueous Solu-
coolingsystemsareplacinggreateremphasisonenginecoolant
tions of Engine Coolants orAntirusts forTesting Purposes
oxidation stability and corrosion protection. This standard
D1193 Specification for Reagent Water
provides an accelerated test method to assess engine coolant
D1384 Test Method for Corrosion Test for Engine Coolants
performance under high temperature oxidizing test conditions
in Glassware
of new, used, and/or recycled engine coolants. The test method
D2272 Test Method for Oxidation Stability of Steam Tur-
may also serve as a screening tool to determine oxidation
bine Oils by Rotating Pressure Vessel
stability. The test results of this method cannot stand alone as
E1 Specification for ASTM Liquid-in-Glass Thermometers
evidence of satisfactory oxidation stability and corrosion
E230 Specification and Temperature-Electromotive Force
protection.The actual service of an engine coolant formulation
(EMF) Tables for Standardized Thermocouples
can be determined only by more comprehensive bench,
dynamometer, and field tests.
3. Summary of Test Method
5. Apparatus
3.1 The engine coolant test fluid and a metal coupon bundle
areplacedinacoveredglasswarecontainerinapressurevessel
5.1 Oxidation Vessel, Glass Sample Container with Four-
Hole Polytetrafluoroethylene (PTFE) Disk, Hold-Down
1
Spring, Pressure Gage, and Test Bath, as described in Annex
This test method is under the jurisdiction ofASTM Committee D15 on Engine
Coolants and Related Fluids and is the direct responsibility of Subcommittee
A1. The assembled apparatus is shown schematically in Fig. 1
D15.21 on Extended Life Coolants.
and Fig. A1.5.
Current edition approved Nov. 1, 2012. Published December 2012. DOI:
10.1520/D7820-12.
5.2 Temperature-Measuring Instrument (Environmentally
2
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
Safe Thermometer or Thermocouple)—An ASTM partial im-
contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
mersion temperature-measuring instrument having a range
Standards volume information, refer to the standard’s Document Summary page on
the ASTM website. from –20 to 150°C (0 to 302°F) and conforming to the
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
1

---------------------- Page: 1 ----------------------
D7820 − 12
FIG. 1 Schematic Drawing of Rotary Pressure Vessel Test Apparatus
requirements for Thermometer 1C (
...

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5.1 The freezing point of an engine coolant indicates the coolant freeze protection.  
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