Chemical resistance of candidate accelerometer cable sheathings to fluids used on CF ships


  1. Haggett, R.D.
  2. Hiltz, J.A.
Corporate Authors
Defence Research Establishment Atlantic, Dartmouth NS (CAN)
The Ship Noise Group DREA is studying ships vibrations radiated into the ocean. This study is part of the "Ship Noise Management System" project whose goal is to predict a ship's signature from within the ship. To monitor the vibration, accelerometers are to be mounted in the bilge spaces of CF Ships. There was concern that the fluids in the bilge space might degrade the accelerometer cable sheathing and affect the accelerometer output. The Materials Chemistry Group DREA was asked to aid in the selection of an accelerometer cable sheathing with the required resistance to bilge fluids. The sheathings, taken from Vibra Metrics, PCB Piezotronics and Wilcoxon Research accelerometers, were immersed in six fluids and their chemical resistance evaluated by monitoring weight gain. The six fluids were 3-GP-24 aviation turbine fuel, HIL-H-5606 hydraulic fluid, MIL-L-23699 synthetic lubricating oil, MIL-L-9000 diesel lubricating oil, 6% AFFF in water, and ethlyene glycol/water (1:1). The urethane based sheathings had good to excellent resistance to all fluids except the synthetic lubricating oi. The copolymer sheathing exhibited only fair resistance to the aviation turbine fuel and the hydraulic fluid. As the major organic constituents of bilge fluids, are fuels and hydrocarbon based lubricants, polyurethane cable sheathing is suitable for use in bilge spaces.
Polyurethane;Bilges;Bilge water;Cable sheathing;Cables;Resistance testing
Report Number
DREA-TM-2000-011 — Technical Memorandum
Date of publication
01 Jan 2000
Number of Pages
Hardcopy;Document Image stored on Optical Disk

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