TESTING AND CONSERVATION LIQUID FOR HYDRAULIC SYSTEMS Russian patent published in 1997 - IPC

FIELD: hydraulic testing and simultaneous conservation of inside holes of units and details of hydrosystems. SUBSTANCE: testing and conservation liquid comprises, mas. %: ethylene glycol, 0.54-1.5; triethanolanime, 1.128-1.726; antifrothing agent, 0.002-0.004; mineral base, 5.80-7.82; tallow oil, 9.13-12.20; isopropyl or ethyl alcohol, 1.24-2.19; protective and conservation additive, 0.16-0.28; water, up to 100. Said additive comprises, mas.%: triethanolamine, 9-11; sodium benzoate or sodium tetraborate, 19-21; water, up to 100. Proposed liquid is used as 18-23 % aqueous solution. Using of testing and conservation liquid enables protection of inside holes against corrosion at ± 50 C and at 100 % moisture content, it excludes freezing out at transportation and storage up to -50 C. Proposed liquid is completely compatible with water-containing working solutions. EFFECT: improved quality of desired product. 2 cl, 2 tbl