ASTM-D5770 › Historical Revision Information
Standard Test Method for Semiquantitative Micro Determination of Acid Number of Lubricating Oils During Oxidation Testing
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Scope
1.1 This test method is a semiquantitative micro method intended for monitoring the changes in acidic constituents occurring in lubricating oils during oxidation testing, when the acid number of such oils falls within the range from 0.02 to 1.0 mg of potassium hydroxide per gram of sample. It is applicable to such oils as turbine oils, hydraulic oils, and other circulating oils. Note 1 - This test method is a micro version of Test Method D 974 and it produces results similar to that method.
1.2 This test method is designed for use where sample size is limited. It shall not be used as a replacement for higher precision methods such as Test Methods D 974 or D 664. It shall not be used to monitor oils in-service.
1.3 The values stated in SI units are to be regarded as the standard. The values given in parentheses are for information only.
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.
Significance and Use
This test method provides a semiquantitative estimate of the acid number of lubricating oils obtained from laboratory oxidation tests using smaller amounts of sample than Test Methods D 974, D 664, or D 3339
Since this test method is semiquantitative, each laboratory shall develop its own criteria for each oxidation test method for determining when to switch from this semiquantitative test method to a more precise test method for acid number.
Keywords
acid number; color indicator titration; oxidation testing; semiquantitative; ICS Number Code 75.100 (Lubricants, industrial oils and related products)
To find similar documents by ASTM Volume:
05.02 (Petroleum Products and Lubricants (II): D3711 - D6122)
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Document Number
ASTM-D5770-02(2007)
Revision Level
2002 R07 EDITION
Status
Superseded
Modification Type
Reapproval
Publication Date
June 1, 2007
Document Type
Test Method
Page Count
3 pages
Committee Number
D02.06