Lubricant Performance and Evaluation.
Abstract
In Task I, Arrhenius plots were developed to describe the effective lives of six MIL-L-7808 lubricants as a function of temperature for selected limiting values of changes in total acid numbers, viscosities and weight losses. Relative ranking of lubricants with respect to their stability depends to some degree on defining maximum permissible limiting values. The static coker deposition tester was used to study the coking characteristics of lubricants. Ranking lubricants with respect to their deposit levels using the static coker was in general similar to the MCRT and coking propensity tests. Foaming characteristics of MIL-L-7808 lubricants were investigated using a static foaming test. Parameters studied included sample volume, airflow, ASTM stone and metal spargers. Foaming data shows the 25 ml volume test using the 13/16 inch diameter 5 micron rated pore size sparger correlates the best with the 200 ml volume Test Method 3213. Chromatographic methods developed for analysis of antioxidants in MIL-L-7808 resulted in isolation and identification of the major intermediates produced during oxidation of PANA and DODPA containing lubricants. Keywords: Lubricant degradation, Deposition, Wear, Load carrying capacity, Lubricant foaming, Lubricant monitoring.
Document Details
- Document Type
- Technical Report
- Publication Date
- Jun 01, 1987
- Accession Number
- ADA183881
Entities
People
- Costandy S. Saba
- Hoover A. Smith
- Michael A. Keller
- Robert E. Kauffman
- Vinod K. Jain
Organizations
- University of Dayton