FLUIDS,LUBRICANTS, FUELS AND RELATED MATERIALS. Quarterly Report for January, February, and March 1959

Technical Report · Tue Mar 31 04:00:00 EST 1959

OSTI ID:4233636

7 9 3 icity data experimentally determined by this Laboratory over a period of years is presented to point out a potential explanation of lubrication difficulties experienced with the silicones and silicates in ferrous bearing systems. Data presented indicate that the fluids may preferentially react with the ferrous bearing surface to form a soft but inert compound or alloy involving iron and silicon This mechanism is similar to the mechanism which has been proposed for the antiwear reaction of materials such as tricresyl phosphate. The data shown have been obtained using a gear pump, a vane pump, and/or the Shell four-ball wear tester. The experimental data shown appear to support and to be consistent with this theory of silicone and silicate lubricity action with bearing surfaces. Recent research and development work at the Wright Air Development Center has suggested the use of 5-ethyl10,10-diphenylphenazasiline (5, 10, 10) alone and in combination with other inhibitors as an antioxidant for ester type lubricants. The combination of 5,10,10 and phenylalpha-naphthylamine (PAN) in a trimethylol propane ester has shown up well in bench tests, mock-up tests, and in a 400 F test in the J-57 engine. The initiation of a program to determine quantitatively the effect of 5,10,10 alone and in combination with PAN on oxidative stable life, oxidation rate, and oxygen tolerance is presented in this report. Various types of esters are being used in this study. In addition other additives such as phenothiazine and Primene-81R (a primary aliphatic amine) are being evaluated alone and in combinations. It has not been possible, in many cases, to evaluate completely the oxidative behavior of some materials available for use as high temperature fluid and lubricant components because of the limited sample size. The type test used by this Laboratory has been modified to allow evaluation at 347 or at 500 F using a charge of 25 milliliters instead of the 100 milliliters normally required. Test geometry is kept the same for the two tests. Data comparing the small volume tests with the tests at 347 or at 500 F are presented. A series of 13 experimertal neopentyl type esters obtained from the Food Machinery and Chemical Corporation are discussed. Using the small volume oxidation procedure discussed above, it has been possible to evaluate the oxidative behavior of these materials at 347 and at 500 F. Stable life type tests have been conducted at 347 F. At 500 F, oxidation rate and oxygen tolerance are emphasized. Studies to optimize the viscosity-volatility-low temperature fluidity properties of mineral oils and hydrocarbons have been continued. The effect of viscosity level or boiling point on wax yield is evaluated by the deep dewaxing (-65 F) of a series of paraffinic mineral oil fractions. This series of narrow boiling fractions covers a viscosity range of 15 to 83 centistokes at 100 F and normal boiling points over the range of 750 to 920 F. The effect of several dispersart Acryloid polymers on the deep dewaxed oils is shown. In all cases, the amount of thickening caused by the polymer is less, percentage-wise, at -40 than at 210 F. This is in contrast to conventional military hydraulic fluids which have about the same or a higher percentage viscosity due to the polymer at low temperature than at high temperature. Preliminary studies desigued to measure more quantitatively the thermal effects on the lubricant are outlined. These studies comprise a more rigorous analysis of the decomposition products, both gaseous and liquid. A series of fluids, lubricants, and base stocks, both mineral oil and synthetic types, have been taken from storage and are being evaluated for changes occurring after long-time storage. These fluids have been stored for periods

• Research Organization: Pennsylvania State Univ., University Park. Petroleum Refining Lab.
• NSA Number: NSA-13-021962
• OSTI ID: 4233636
• Report Number(s): PRL-5.26
• Country of Publication: United States
• Language: English

Related Subjects

ALCOHOLS
ALKYL RADICALS
AMINES
AROMATICS
BEARINGS
BOILING
CATALYSIS
CHEMICAL REACTIONS
CHEMISTRY
COMPOUNDS
CRESYL RADICALS
DECOMPOSITION
DISPERSIONS
EFFICIENCY
ESTERS
ETHYL RADICALS
FLUIDS
GASES
HETEROCYCLICS
HYDROCARBONS
IRON
IRON COMPOUNDS
LABORATORY EQUIPMENT
LIQUIDS
LOW TEMPERATURE
LUBRICATION
MACHINE PARTS
MATERIALS TESTING
MEASURED VALUES
MECHANICS
MOCKUP
MOTORS
NAPHTHALENE
OILS
ORGANIC COMPOUNDS
ORGANIC NITROGEN COMPOUNDS
ORGANIC PHOSPHORUS COMPOUNDS
ORGANIC SULFUR COMPOUNDS
OXIDATION
PARAFFIN
PENTANE
PHENOTHIAZINES
PHENYL RADICALS
PHOSPHATES
POLYMERS
PRESSURE
PRIMENE
PUMPS
REACTION KINETICS
REFINI