METHOD OF TESTING HYDRAULIC FLUIDS BASED ON GLYCOLS AND GLYCOL-BORIC ACID ESTERS FOR PRECIPITATION TENDENCY

摘要

The water content of the hydraulic fluid under test is first adjusted to between 3 and 20 wt % relative to the water-containing fluid and the water-containing fluid is then mixed with at least an equal volume of tetrahydrofurane or monoethylene glycol dimethyl ether. The formation or non-formation of precipitate is then determined.