- Author
- Krawetz, A. A. | Tovrog, T. | Krawetz, G. A.
- Title
- Thermochemical Behavior of Fluids, Lubricants and Related Materials. Final Report. September 22, 1981 to October 24, 1984.
- Coporate
- Phoenix Chemical Lab., Inc., Chicago, IL
- Report
- AFWAL-TR-85-4078 Volume 2, June 1985, 596 p.
- Keywords
- oxidation | hydraulic fluids | greases | induction period
- Abstract
- Thermal and oxidative stabilities of candidate advanced hydraulic fluids, gas turbine engine oils and greases were determined. An apparatus and accompanying test method were developed to investigate the oxidation resistance of candidate advanced fluids and lubricants by determining the induction period and rates of oxygen absorption of base stocks and candidate formulations using an automated small-scale dynamic oxygen absorption apparatus designed under this contract. A new shear stability apparatus and method were developed to determine the viscosity stability of candidate hydraulic aerospace hydraulic fluids. Flammability characteristics of candidate fire-resistant hydraulic fluids and lubricants and their mixtures were determined using two autoignition temperature methods and a linear flame propagation method. A newly developed Corrosion Rate Evaluation Procedure (CREP) was investigated with the primary pupose of improving reproducibility and repeatibility as well as laboratory-to-laboratory repeatibility. Simulation of the wear surfaces in a typical aerospace hydraulic pump was attempted using a steel pin on a bronze disc in a standard Fale No. 6 instrument and the related performance of candidate nonflammable hydraulic fluids were assessed.