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ASTM D7098-08e1

(Test Method)

Standard Test Method for Oxidation Stability of Lubricants by Thin-Film Oxygen Uptake (TFOUT) Catalyst B

Standard Test Method for Oxidation Stability of Lubricants by Thin-Film Oxygen Uptake (TFOUT) Catalyst B

SIGNIFICANCE AND USE
This test method was originally developed to evaluate oxidation stability of lubricating base oils combined with additives chemistries similar to those found in gasoline engine oils and service.  
This test method is useful for screening formulated oils before engine tests. Within similar additive chemistries and base oil types, the ranking of oils in this test appears to be predictive of ranking in certain engine tests. When oils having different additive chemistries or base oil type are compared, results may or may not reflect results in engine tests. Only gasoline engine oils were used in generating the precision statements in this test method.
SCOPE
1.1 This test method covers the oxidation stability of lubricants by thin-film oxygen uptake (TFOUT) Catalyst B. This test method evaluates the oxidation stability of petroleum products, and it was originally developed as a screening test to indicate whether a given re-refined base stock could be formulated for use as automotive engine oil (see Test Method D4742). The test is run at 160°C in a pressure vessel under oxygen pressure, and the sample contains a metal catalyst package, a fuel catalyst, and water to partially simulate oil conditions in an operating engine. In addition, the test method has since been found broadly useful as an oxidation test of petroleum products.  
1.2 The applicable range of the induction time is from a few minutes up to several hundred minutes or more. However, the range of induction times used for developing the precision statements in this test method was from 40 to 280 min.
1.3 The values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard.
1.3.1 Exception—Pressure units are provided in psig, and dimensions are provided in inches in Annex A1 and Annex A2, because these are the industry accepted standard and the apparatus is built according to the figures shown.
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
14-Oct-2008
ICS
75.100 - Lubricants, industrial oils and related products
Technical Committee
D02 - Petroleum Products, Liquid Fuels, and Lubricants
Drafting Committee
D02.09.0G - Oxidation Testing of Engine Oils
Current Stage
Ref Project

Relations

Replaces
ASTM D7098-08 - Standard Test Method for Oxidation Stability of Lubricants by Thin-Film Oxygen Uptake (TFOUT) Catalyst B
Effective Date
15-Oct-2008

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ASTM D7098-08e1 - Standard Test Method for Oxidation Stability of Lubricants by Thin-Film Oxygen Uptake (TFOUT) Catalyst BASTM D7098-08e1 - Standard Test Method for Oxidation Stability of Lubricants by Thin-Film Oxygen Uptake (TFOUT) Catalyst B
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ASTM D7098-08e1 - Standard Test Method for Oxidation Stability of Lubricants by Thin-Film Oxygen Uptake (TFOUT) Catalyst B
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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
´1
Designation: D7098 − 08
StandardTest Method for
Oxidation Stability of Lubricants by Thin-Film Oxygen
1,2
Uptake (TFOUT) Catalyst B
This standard is issued under the fixed designation D7098; 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
ε NOTE—Updated units statement in 1.3 and improved figure quality editorially in November 2009.
1. Scope* 1.4 This standard does not purport to address all of the
safety concerns, if any, associated with its use. It is the
1.1 This test method covers the oxidation stability of
responsibility of the user of this standard to establish appro-
lubricants by thin-film oxygen uptake (TFOUT) Catalyst B.
priate safety and health practices and determine the applica-
This test method evaluates the oxidation stability of petroleum
bility of regulatory limitations prior to use.
products, and it was originally developed as a screening test to
indicate whether a given re-refined base stock could be
2. Referenced Documents
3
formulated for use as automotive engine oil (see Test Method
5
2.1 ASTM Standards:
D4742). The test is run at 160°C in a pressure vessel under
A314 Specification for Stainless Steel Billets and Bars for
oxygen pressure, and the sample contains a metal catalyst
Forging
package, a fuel catalyst, and water to partially simulate oil
B211 Specification for Aluminum and Aluminum-Alloy
conditions in an operating engine. In addition, the test method
Rolled or Cold Finished Bar, Rod, and Wire
has since been found broadly useful as an oxidation test of
4
D664 Test Method for Acid Number of Petroleum Products
petroleum products.
by Potentiometric Titration
1.2 The applicable range of the induction time is from a few
D1193 Specification for Reagent Water
minutes up to several hundred minutes or more. However, the
D2272 Test Method for Oxidation Stability of Steam Tur-
range of induction times used for developing the precision
bine Oils by Rotating Pressure Vessel
statements in this test method was from 40 to 280 min.
D4742 Test Method for Oxidation Stability of Gasoline
1.3 The values stated in SI units are to be regarded as Automotive Engine Oils by Thin-Film Oxygen Uptake
standard. No other units of measurement are included in this (TFOUT)
standard. E1 Specification for ASTM Liquid-in-Glass Thermometers
1.3.1 Exception—Pressure units are provided in psig, and E144 Practice for Safe Use of Oxygen Combustion Vessels
dimensionsareprovidedininchesinAnnexA1andAnnexA2,
3. Terminology
because these are the industry accepted standard and the
apparatus is built according to the figures shown. 3.1 Definitions of Terms Specific to This Standard:
3.1.1 break point—the precise point of time at which rapid
1
oxidation of the oil begins.
This test method is under the jurisdiction of ASTM Committee D02 on
Petroleum Products, Liquid Fuels, and Lubricants and is the direct responsibility of
3.1.2 oxidation induction time—the time until the oil begins
Subcommittee D02.09.0G on Oxidation Testing of Engine Oils.
to oxidize at a relatively rapid rate as indicated by the decrease
Current edition approved Oct. 15, 2008. Published November 2008. Originally
ε1
approved in 2005. Last previous edition approved in 2006 as D7098–06 . DOI: of oxygen pressure.
10.1520/D7098-08E01.
2 3.1.3 oxygen uptake—oxygen absorbed by oil as a result of
While Catalyst B can be used for testing oxidation stability of many lubricant
types, the mixture of fuel, nitro-paraffin, and catalyst components used in this test oil oxidation.
method simulates the Sequence IIIE Engine Test. Test results on several ASTM
reference oils have been found to correlate with Sequence IIIE engine tests in hours
4. Summary of Test Method
for a 375 % viscosity increase. (See Ku, Chia-Soon, Pei, Patrick T., and Hsu,
4.1 The test oil is mixed in a glass container with four other
Stephen M., “A Modified Thin-Film Oxygen Uptake Test (TFOUT) for the
Evaluation of Lubricant Stability in ASTM Sequence IIIE Test, SAE Technical
liquids used to simulate engine conditions: (1) an oxidized/
Paper Series 902121, Tulsa, OK, Oct. 22-25, 1990.)
3
Ku, C. S. and Hsu, S. M., “A Thin Film Uptake Test for the Evaluation of
5
Automotive Lubricants,” Lubrication Engineering, 40, 2, 1984, pp. 75–83. For referenced ASTM standards, visit the ASTM website, www.astm.org, or
4
Selby, Theodore W., “Oxidation Studies with a Modified Thin-Film Oxygen contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
Uptake Test”, SAE Technical Paper Series 872127, Toronto, Ontario, Nov. 2-5, Standards volume information, refer to the standard’s Document Summary page o
...

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5.1 The low-temperature, low-shear-rate viscosity of automatic transmission fluids, gear oils, torque and tractor fluids, and industrial and automotive hydraulic oils (see Appendix X4) are of considerable importance to the proper operation of many mechanical devices. Measurement of the viscometric properties of these oils and fluids at low temperatures is often used to specify their acceptance for service. This test method is used in a number of specifications.  
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1.3 Spectra and distribution profiles presented herein are for illustrative purposes only and are not to be construed as representing or establishing lubricant or machinery guidelines.  
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1.4 The several reference elastomer formulations specified in this test method were chosen to be representative of those used in both heavy-duty diesel engines (detailed in Annex A1) and passenger-car spark-ignition engines (the latter are covered in Annex A2). The procedures described in this test method can, however, also be used to evaluate the compatibility of automotive engine oils with different elastomer types/formulations or different test durations and temperatures to those employed in this test method.
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Standard Test Method for Determination of Glycol for In-Service Engine Oils by Gas Chromatography

SIGNIFICANCE AND USE
5.1 Some glycol/antifreeze dilution of in-service engine oil is normal under typical operating conditions. However, excessive glycol dilution can lead to decreased performance, premature wear, or sudden engine failure. This test method provides a means of quantifying the level of glycol based antifreeze dilution, allowing the user to take necessary action.
SCOPE
1.1 This test method covers the determination of glycol based antifreeze for in-service engine oil by derivative headspace/gas chromatography.  
1.2 Sample is derivatized in-situ directly in a headspace sampling vial prior to vapor phase extraction and injection into a gas chromatograph.  
1.3 The chemistry of the derivatization is unique to the detection of the molecules of ethylene glycol and 1,2-propylene glycol. 1,3-propylene glycol could also be detected but is not used in any known anti-freeze at this time. Other coolant analyses are beyond the scope of this test method.  
1.4 The derivatization process does not affect glycol breakdown products such as glycolate and formate and hence the presence of these compounds in the oil will not be quantified.  
1.5 The test method concentration range is from 50 µg/g to 1000 µg/g. Lower levels are possible by method modifications. Higher levels are possible through sample dilution.  
1.6 Units—The values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard.  
1.7 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.  
1.8 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.

  • Standard
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  • Standard
    8 pages
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ASTM
ASTM D7918-23(Test Method)
Standard Test Method for Measurement of Flow Properties and Evaluation of Wear, Contaminants, and Oxidative Properties of Lubricating Grease by Die Extrusion Method and Preparation

SIGNIFICANCE AND USE
5.1 Trending the wear, contamination, consistency, and oxidative properties of a lubricating grease is a crucial part of condition-monitoring programs. Changes in these properties or deviations from the new grease can be indicative of problems within the lubricated component, such as the mixing of incompatible thickener types, excessive wear or contaminant levels, or significant depletion of antioxidant levels. These test methods also makes it possible to develop trends that can be used to predict failures before they occur and allow for corrective action to be taken.
SCOPE
1.1 This test method covers the determination and evaluation of flow properties, wear levels, contaminants, and oxidative condition of new and in-service lubricating grease.  
1.2 This test method provides guidance on evaluating in-service grease samples, NLGI grades 00 to 3, for wear, consistency, contamination, and oxidation.  
1.3 The values stated in SI units are to be regarded as the standard. The values given in parentheses are for information only.  
1.3.1 Exception—The exception to this will be where units of references were developed by the developers of the test equipment and necessary to report the results of the test.  
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, health, and environmental practices and determine the applicability of regulatory limitations prior to use.  
1.5 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.

  • Standard
    9 pages
    English language
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  • Standard
    9 pages
    English language
    sale 15% off