Accession Number : AD0654797

Title :   THERMAL STABILITY AT 750F OF HIGH TEMPERATURE FLUIDS AND FLUID INTERMIXTURES.

Descriptive Note : Technical rept.,

Corporate Author : ARMY WEAPONS COMMAND ROCK ISLAND ILL RESEARCH AND ENGINEERING DIV

Personal Author(s) : LeMar,Ralph L.

Report Date : APR 1967

Pagination or Media Count : 25

Abstract : The thermal stability of six high temperature fluids and twelve of their most stable intermixtures was evaluated at 750F for a period of six hours under nitrogen in the presence of copper, titanium, steel and monel metal specimens. When each of the six fluids was tested individually, polyphenyl ether and phenyl methyl polysiloxane displayed outstanding stability. A chlorinated biphenyl fluid was moderately stable but was corrosive to several metals. Diphenyl bis-n-dodecyl silane, tetra (2-ethyl-hexyl) ortho silicate and deep dewaxed, super refined mineral oil all underwent severe degradation. Among the fluid intermixtures, five displayed good to moderate thermal stability. These generally consisted of combinations of the three most stable fluids. Most mixtures containing the silicate and mineral oil fluids as well as these two fluids when tested separately, could be ignited at room temperature after exposure to 750F. The metals most resistant to fluid attack were copper and titanium. (Author)

Descriptors :   (*HEAT RESISTANT MATERIALS, HYDRAULIC FLUIDS), (*HYDRAULIC FLUIDS, THERMAL STABILITY), (*PHENYL ETHER, THERMAL STABILITY), (*SILICONES, THERMAL STABILITY), MIXTURES, SILOXANES, POLYMERS, SILANES, SILICATES, MINERAL OILS, PYROLYSIS, CORROSION, COPPER, STEEL, TITANIUM, NICKEL ALLOYS, COPPER ALLOYS, COMPATIBILITY

Subject Categories : Lubricants and Hydraulic Fluids

Distribution Statement : APPROVED FOR PUBLIC RELEASE