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Abstract
A boundary lubrication study was made to compare five recently developed C-ether-formulated fluids with an advanced formulated MIL-L-27502 candidate ester. Steady-state wear and friction measurements were made with a sliding pin-on-disk friction apparatus. Conditions included disk temperatures up to 260°C, dry-air test atmosphere, 1-kilogram load, 50-rpm disk speed, and test times to 130 minutes. Based on wear rates and coefficients of friction, three of the C-ether formulations as well as the C-ether base fluid gave better boundary lubrication than the ester fluid under all test conditions. The susceptibility of C-ethers to selective additive treatment (phosphinic esters or acids and other antiwear additives) was demonstrated when two of the formulations gave somewhat improved lubrication over the base fluid. Also, the increased operating potential for this fluid was shown in relationship to bulk oil temperature for MIL-L-23699 and MIL-L-27502 type esters.
Presented at the 37th Annual Meeting in Cincinnati, Ohio, May 10–13, 1982
Notes
Presented at the 37th Annual Meeting in Cincinnati, Ohio, May 10–13, 1982