Accession Number:

ADA183881

Title:

Lubricant Performance and Evaluation.

Descriptive Note:

Interim rept. 17 Jun 85-17 Jan 87,

Corporate Author:

DAYTON UNIV OH RESEARCH INST

Personal Author(s):

Report Date:

1987-06-01

Pagination or Media Count:

567.0

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 1316 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.

Descriptors:

Subject Categories:

  • Lubricants and Hydraulic Fluids

Distribution Statement:

APPROVED FOR PUBLIC RELEASE


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