Standard Test Method for Semiquantitative Micro Determination of Acid Number of Lubricating Oils During Oxidation Testing

Available format(s)

Hardcopy , PDF

Language(s)

English

Published date

08-01-2023

Publisher

American Society for Testing and Materials

1.1This 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 mg 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 D974 and it produces results similar to that method.

1.2This 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 D974 or D664. It shall not be used to monitor oils in-service.

1.3The values stated in SI units are to be regarded as the standard.

1.3.1Exception—The values given in parentheses are for information only.

1.4This 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.

1.5This 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.

Committee	D 02
DocumentType	Test Method
Pages	3
PublisherName	American Society for Testing and Materials
Status	Current
Supersedes	ASTM D 5770 : 2011 : R2017

ASTM D 943 : 2020	Standard Test Method for Oxidation Characteristics of Inhibited Mineral Oils
ASTM D 5846 : 2007 : R2017	Standard Test Method for Universal Oxidation Test for Hydraulic and Turbine Oils Using the Universal Oxidation Test Apparatus
ASTM D 4871 : 2011 : R2022	Standard Guide for Universal Oxidation/Thermal Stability Test Apparatus

ASTM D 974 : 2022	Standard Test Method for Acid and Base Number by Color-Indicator Titration
ASTM D 4175 : 2023	Standard Terminology Relating to Petroleum Products, Liquid Fuels, and Lubricants
ASTM D 4175 : 2023 : EDT 1	Standard Terminology Relating to Petroleum Products, Liquid Fuels, and Lubricants
ASTM D 4175 : 2023 : REV A	Standard Terminology Relating to Petroleum Products, Liquid Fuels, and Lubricants