Effectiveness of various organometallics as antiwar additives in mineral oil
Donald H. Buckley, United States. National Aeronautics and Space Administration. Scientific and Technical Information Office
National Aeronautics and Space Administration, Scientific and Technical Information Office, 1977 - Science - 17 pages
Sliding friction experiments were conducted with 1045 steel contacting 302 stainless steel and lubricated with various organometallics in mineral oil. Auger emission spectroscopy was used to determine the element present in the wear contact zone. The results indicate that there are organometallics which are as effective an antiwear additives as the commonly used zinc dialkyl dithiophosphate. These include dimethyl cadmium, triphenyl lead thiomethoxide, and triphenyl tin chloride. The additives were examined in concentrations to 1 weight percent. With dimethyl cadmium at concentrations of 0.5 weight percent and above, cadmium was detected in the contact zone. Coincident with the detection of cadmium, a marked decrease in the friction coefficient was observed. All additives examined reduced friction, but only the aforementioned reduced wear to a level comparable to that observed with zinc dialkyl dithiophosphate.
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1-percent zinc dialkyl 1045 steel rider 302 stainless steel additive-free mineral oil ADDITIVES IN MINERAL AES analysis AES results obtained AES spectrum argon Auger emission spectroscopy Auger emission spectrum Auger spectroscopy friction bromine carbon peak chloride in mineral chromium cient of wear cobalt carbonyl concentrations of dimethyl degassed mineral oil detected with cient disk specimen disk surface elements present experiments were conducted friction and wear friction coefficient halogen include dimethyl cadmium Lewis Research Center lubricated with various metal oil containing ORGANOMETALLICS AS ANTIWEAR Percent dimethyl Percent triphenyl Percent zinc phosphorus presented in figure presented in table reduced wear Rider Elements detected rider specimen scar Auger spectroscopy Sliding friction experiments spectroscopy friction diameter spectrum for 302 spectrum of figure stainless steel lubricated sulfur triphenyl lead thiomethoxide triphenyl methyl tin triphenyl tin chloride VARIOUS ORGANOMETALLICS wear results obtained wear scar Auger wear scar diameter wear surface wear track weight percent zinc dialkyl dithiophosphate