ASTM D5483-20, developed by the American Society for Testing and Materials (ASTM), describes a test method for determining the oxidation induction time of lubricating greases exposed to oxygen at 3,5 MPa (500 psig) and temperatures between 155 and 210 degrees Celsius.
The oxidation induction time determined under the conditions of this test method is used as an indicator of oxidation stability. This test method is mainly used for research and development, quality control and specification studies. However, no relationship was found between the results of this test method and service performance.
The oxidation stability of engine oils is traditionally determined by the rotating pressure vessel oxidation test. However, recent experiments on a range of motor oils and a set of hydrocracking and solvent neutral base oils have shown that differential pressure scanning calorimetry also accurately determines the oxidation stability of lubricating oils.
In general, oxidation stability testing is performed for the following purposes:
The pressure difference scanning calorimetry device, used in tests properly conducted according to the ASTM D5483 standard, is an analytical testing instrument used by large companies to determine the oxidation resistance of lubricating oils and greases. For grease tests, obtaining a smooth surface film on the sample in the test pan is a complex process. Furthermore, operator expertise is required to ensure that the pressurization steps do not cause the test pans to be removed from the test area at the beginning of the test. Sometimes this necessitates a repetition of the test. Also, the effect of the chosen test pressure on the result is an important variable to understand.
Among the numerous test, measurement, analysis and evaluation studies that our company provides for businesses in various sectors, with its trained and expert staff and advanced technological equipment, standard testing services for the oxidation induction time of lubricating greases with pressure differential scanning calorimetry within the scope of ASTM D5483-20 standard. gives.
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