The SAE ARP 5088 standard, developed by the Society of Automotive Engineers (SAE), provides a test method for determining the total acid number of new and degraded polyol ester and diester based gas turbine lubricants. In these tests, a potentiometric titration technique is used. This test method has been validated to cover the acidity range of 0,05 to 6,0 mg KOH g-1. The method is also considered suitable for the determination of acidities outside this range and for other classes of lubricants.
This test method can be used to aid in the evaluation of a lubricant during total acid count, condition monitoring, and during quality assurance or specification verification.
In determining the acid number, ASTM D1613, ASTM D3242, ASTM D3339, ASTM D664, ASTM D7795, ASTM D847, ASTM D974 and other standards developed by the American Testing and Materials Organization (ASTM) are also used. These different test methods use different instruments or procedures or are used for certain sample types. For example, the test method presented in the ASTM D1613 standard involves determining the total acidity as acetic acid at concentrations below 0.05 percent in organic compounds and mixtures of hydrocarbons used in paint, varnish and varnish solvents and diluents.
The basis of potentiometric titration methods is based on measuring the potential after each addition of the reagent. The solution to be titrated is connected to the reference electrode with the help of a salt bridge, the indicator electrode is immersed in the solution and the value of the solution is measured. During the test, a redox reaction occurs in the solution after each addition of the reagent. Potentiometric titrations are particularly versatile and suitable indicator electrodes are available for the study of almost any chemical reaction used in titrimetry. This method can be applied to any solution. This method is also used in the implementation of the SAE ARP 5088 standard.
Among the numerous test, measurement, analysis and evaluation studies it has given for businesses in various sectors, our organization, with its trained and expert staff and advanced technological equipment, is tested with automatic potentiometric titration for the determination of total acidity in polyol ester and diester gas turbine oils within the scope of SAE ARP 5088 standard. also provides services.
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