An Investigation of the Effects of Oxygen and Water Vapor on the Compressive Film Strength of Boundary Films on Iron Substrates - Part II.
BATTELLE COLUMBUS LABS OHIO
Pagination or Media Count:
The objectives of this program are to study the effect of O2 and H2O on the compressive strength of boundary lubricant films on iron surfaces and to correlate these effects with the basic physical and chemical phenomena responsible for the formation and stabilization of the films and the converse phenomena of degradation and dissolution. The work described in this report is for the second year of a 3-year AFOSR program. In the second year of the program, the film penetration apparatus was modified to permit repeatable, routine measurements under controlled atmospheres. Experiments carried out in dry and wet air environments indicate that the presence of H2O has a strong retarding effect on the formation of strong boundary films from both pure ester and TCP solutions. The reaction rates were observed to increase sharply at temperatures above 105 - 110 C. Experiments carried out in dry and wet argon environments indicate that O2 is essential to the formation of compressively strong films. Weak films found in argon gained strength with exposure to air.
- Physical Chemistry
- Lubricants and Hydraulic Fluids