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Test Method for the Determination of Total Acidity in Polyol Ester and Diester Gas Turbine Lubricants by Automatic Potentiometric Titration
- Aerospace Standard
- ARP5088B
- Revised
Sector:
Issuing Committee:
Language:
English
Scope
The test method describes the procedure for determination of the total acid number of new and degraded polyol ester and diester based gas turbine lubricants by potentiometric titration technique. The method was validated to cover an acidity range 0.05 to 6.0 mg KOH g-1. The method may also be suitable for the determination of acidities outside of this range and for other classes of lubricant.
Rationale
This document has been modified based on the results of a round robin which took place during 2013. Major modifications include use of combination electrodes and recognizing that the volume of samples available from service or laboratory tests may make using a 20 g sample size impractical for clean oils, thus a 2.5 g sample size may be used if the 20 g sample size cannot be obtained. Precision statements have been updated.
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Data Sets - Support Documents
No Datasets Available
Issuing Committee
E-34 Propulsion Lubricants Committee
This committee encompasses lubricants for gas turbine engines, as well as aircraft gear boxes and accessories. In addition, the work of the committee encompasses lubricants for privately owned jet or turbo propeller engines that operate on synthetic lubricants.
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ISO 3696 | This document is not part of the subscrption. |
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