Abstract
AbstractThe evaluation is described of a seawater emulsifying, non‐corrosive, hydraulic and lubricating fluid in the external hydraulic systems of four ships for periods ranging from 33 to 71 weeks. Monthly fluid samples, valves, and corrosion coupons from the ships were analyzed during the evaluation period. No fluid‐related difficulty was experienced and no significant corrosion of any system component was detected, even though seawater contamination occurred in the system of two ships. The results indicate that the concept of using a seawater emulsifying, noncorrosive, hydraulic and lubricating fluid in external hydraulic systems is feasible. The particular fluid used in this study is considered satisfactory for use on an interim basis until fluids are available which conform to the newly issued specification Military Specification MIL‐H‐24430 (SHIPS). The new fluids will provide a significantly superior degree of corrosion protection to seawater contaminated hydraulic systems to that provided by the current service fluids.
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