ASTM D6375-05

Standard Test Method for Evaporation Loss of Lubricating Oils by Thermogravimetric Analyzer (TGA) Noack Method

SIGNIFICANCE AND USE
This test method is a safe and fast alternative for determination of the Noack evaporation loss of a lubricant.
The evaporation loss of a lubricant is important in the hot zones of equipment where evaporation of part of the lubricant may increase lubricant consumption.
Some lubricant specifications cite a maximum allowable evaporative loss.
SCOPE
1.1 This test method covers the procedure for determining the Noack evaporation loss of lubricating oils using a thermogravimetric analyzer test (TGA). The test method is applicable to base stocks and fully formulated lubricant oils having a Noack evaporative loss ranging from 0 to 30 mass %. This procedure requires much smaller specimens, and is faster when multiple samples are sequentially analyzed, and safer than the standard Noack method using Wood's metal.
1.2 The evaporative loss determined by this test method is the same as that determined using the standard Noack test methods.
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 and health practices and determine the applicability of regulatory limitations prior to use.

General Information

• Status: Historical
• Publication Date: 31-May-2005
• ICS: 75.100 - Lubricants, industrial oils and related products
• Technical Committee: D02 - Petroleum Products, Liquid Fuels, and Lubricants
• Drafting Committee: D02.06 - Analysis of Liquid Fuels and Lubricants

Relations

• Replaces: ASTM D6375-99a - Standard Test Method for Evaporation Loss of Lubricating Oils by Thermogravimetric Analyzer (TGA) Noack Method
• Effective Date: 01-Jun-2005
• Replaced By: ASTM D6375-09 - Standard Test Method for Evaporation Loss of Lubricating Oils by Thermogravimetric Analyzer (TGA) Noack Method
• Effective Date: 01-Mar-2009
• Referred By: ASTM D6074-15(2022) - Standard Guide for Characterizing Hydrocarbon Lubricant Base Oils
• Effective Date: 01-Jun-2005

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NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.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
An American National Standard
Designation: D 6375 – 05
Standard Test Method for
Evaporation Loss of Lubricating Oils by Thermogravimetric
1
Analyzer (TGA) Noack Method
This standard is issued under the fixed designation D 6375; 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* 2.2 Other Documents:
DIN 51-581 Determination of Evaporation Loss of Lubri-
1.1 This test method covers the procedure for determining
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cating Oils
the Noack evaporation loss of lubricating oils using a thermo-
5
CEC L-40-T-87 Evaporation Loss of Lubricating Oils
gravimetric analyzer test (TGA). The test method is applicable
JPI-5S-41-93 Determination of Evaporation Loss of Engine
to base stocks and fully formulated lubricant oils having a
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Oils (Noack Method)
Noack evaporative loss ranging from 0 to 30 mass %. This
SAE 962035 The Thermogravimetric Noack Test: A Pre-
procedurerequiresmuchsmallerspecimens,andisfasterwhen
cise, Safe and Fast Method for Measuring Lubricant
multiple samples are sequentially analyzed, and safer than the
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Volatility
standard Noack method using Wood’s metal.
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IP 421 Evaporation Loss of Lubricating Oils
1.2 The evaporative loss determined by this test method is
the same as that determined using the standard Noack test
3. Terminology
methods.
3.1 Definitions of Terms Specific to This Standard:
1.3 The values stated in SI units are to be regarded as
3.1.1 Noack reference oil—the oil provided by Noack
standard. No other units of measurement are included in this
equipment manufacturers to check proper operation of the
standard.
Noack evaporation tester.
1.4 This standard does not purport to address all of the
3.1.2 Noack reference time—the time (in minutes) required
safety concerns, if any, associated with its use. It is the
for the Noack reference oil to reach its known Noack evapo-
responsibility of the user of this standard to establish appro-
rative loss under the conditions used in this test method.
priate safety and health practices and determine the applica-
3.1.3 TGA Noack volatility—the evaporative loss (in mass
bility of regulatory limitations prior to use.
percent) of a lubricant as determined in this test method.
2. Referenced Documents
4. Summary of Test Method
2
2.1 ASTM Standards:
4.1 A lubricant specimen is placed in an appropriate TGA
D 5800 Test Method for Evaporation Loss of Lubricating
specimen pan. The pan is placed on the TGA pan holder and
Oils by the Noack Method
quicklyheatedtobetween247and249°Cunderastreamofair,
D 6299 Practice for Applying Statistical Quality Assurance
and then held isothermal for an appropriate time. Throughout
Techniques to Evaluate Analytical Measurement System
this process, the TGA monitors and records the mass loss
Performance
experienced by the specimen due to evaporation. The Noack
D 6792 Guide for Quality System in Petroleum Products
3 evaporationlossissubsequentlydeterminedfromthespecimen
and Lubricants Testing Laboratories
weight percent loss versus time curve (TG curve) as the mass
E 1582 Practice for Calibration of Temperature Scale for
percent lost by the specimen at the Noack reference time
Thermogravimetry
determined under the same TGA conditions.
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This test method is under the jurisdiction of ASTM Committee D02 on Available from Deutsches Institut fur Normunge, Beuth Verlag GmbH, Burg-
Petroleum Products and Lubricants and is the direct responsibility of Subcommittee grafenstrasse 6, 1000 Berlin 30, Germany.
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D02.06 on Analysis of Lubricants. Available from CEC, Madou Plaza, 25th floor, Place Madou, B-1210, Brussels,
CurrenteditionapprovedJune1,2005.PublishedJuly2005.Originallyapproved Belgium.
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in 1999. Last previous edition approved in 1999 as D 6375–99a. Available from Petroleum Assoc. of Japan, Keidanren No. 90-4, 1 Chrome,
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For referenced ASTM standards, visit the ASTM website, www.astm.org, or Ohtemachi, Chiyoda-Ku, Tokyo 100-0004, Japan.
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contact ASTM Customer Service at [e-mail]. For Annual Book of ASTM Available from Society of Automotive Engineers, 400 Commonwealth Drive,
Standards volume information, refer to the standard’s Document Summary page on Warrendale, PA 15096.
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the ASTM website. Available fromAmerican National Standards Institute (ANSI), 25 W. 43rd St.,
3
Withdrawn. 4th Floor, New York, NY 10036.
*A Summary of Changes section appears at the end of this standard.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.
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D6375–05
FIG. 1 Examples Showing Adaptation of Alternative Sample
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