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Abstract
Tribochemical surface reactions were kinetically analyzed using a radioactive tracer technique. Radioactive dibenzyl disulfide labeled with sulfur-35 was used as an additive, steel disks were used as specimens. To investigate the effects of the base-oil viscosity, four mineral oils having different viscosities were used as the base oils.
It was found that the behavior of additive molecules in the oil was explained by a concept of dynamic processes, such as a mechanical disturbance (friction), and an adsorption-desorption process of molecules which was under the influence of the base-oil viscosity.
Summarizing the results of kinetical analyses in the authors' previous works and this work, it was concluded that the role of the base oil was inevitably sustained even in a boundary lubrication where tribochemical reaction occurred and chemical wear was predominant. Also, it was shown by kinetical data that lubrication failure was caused by the geometry of contact rather than the pressure of contact.
Presented as an American Society of Lubrication Engineers paper at the ASME/ASLE Lubrication Conference in San Francisco, California, August 18–21, 1980.
Notes
Presented as an American Society of Lubrication Engineers paper at the ASME/ASLE Lubrication Conference in San Francisco, California, August 18–21, 1980.