Study of Hydraulic System Component Storage with a Rust Inhibited Barium Free Development Hydraulic Fluid Candidate

摘要

METSS Corporation, under a Small Business Innovation Research program (F33615-96-C-5074) with AFRL/MLBT, developed a hydraulic fluid candidate known as METTS HyTherm CI-2. This fluid is intended to be rust inhibited, barium free, thermally stable and fire resistant hydraulic fluid suitable for aircraft use. METSS HyTherm CI-2 would eliminate the need for a separate storage fluid for components. The currently used storage fluid is classified as hazardous waste due to the barium additives. The METTS HyTherm CI- 2 fluid was contaminated with distilled water and stored in jars containing bearings and pistons in a controlled environment. Each jar was inspected once a year for three years. At the end of the storage period, the METTS HyTherm CI-2 fluid was endurance pump tested. The METSS HyTherm CI-2 fluid excelled in all storage tests as well as the pump endurance test. There was no corrosion present after three years of storage, and pump performance was comparable with the pump performance with fluid MIL-PRF-83282 used in an earlier study.