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pounds provide effective lubrication under extreme pressure conditions by reacting with metal surface to form sulfide film. But the author's previous report1),2) has shown that when the extreme pressure properties of various degassed lubricating oils and some sulfur compounds in a degassed mineral oil were assessed by the Soda Four Ball machine, the reduction of dissolved oxygen content in oils caused a decrease in the seizure load of degassed oil and a lowering of the extreme

Reaction between Iron and Sulfur Compound with S-35 as a Tracer